An input switching circuit dynamically connects, based on an input mapping table, input streams to inputs of a wavefront pre-transform circuit. An output switching circuit dynamically connects, based on an output mapping table, output data at outputs of the wavefront pre-transform circuit to transport streams. A controller controls, based on a wiping command, at least one of the input and output switching circuits to alter at least one of the input and output mapping tables such that the at least one of the input and output switching circuits is disabled for connection. A first subset of the transport streams operates in a foreground mode available to a user and is transported for storage in remote storage sites at a network and a second subset of the transport streams operates in a background mode available to an administrator and is not transported for storage in the remote storage sites.
A communication system comprises a remote digital beam-forming network configured to receive a set of input signals destined for a set of user devices and generate element signals to be radiated by a set of remote antenna array elements; a pre-processor coupled to the remote digital beam-forming network, configured to perform a wavefront multiplexing transform on signal waveforms including the element signals and generate wavefront multiplexed signals; an optical line terminal coupled to the pre-processor, configured to process the wavefront multiplexed signal streams to generate optical waveform streams; and optical fibers coupling the optical line terminal to a set of optical network units.
H04B 7/0452 - Systèmes MIMO à plusieurs utilisateurs
H04B 7/06 - Systèmes de diversitéSystèmes à plusieurs antennes, c.-à-d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station d'émission
H04B 10/2575 - Radio sur fibre, p. ex. signal radio modulé en fréquence sur une porteuse optique
H04N 7/20 - Adaptations pour la transmission sur une bande de fréquence du domaine des GHz, p. ex. par satellite
H04L 27/26 - Systèmes utilisant des codes à fréquences multiples
H04W 52/42 - Commande de puissance d'émission [TPC Transmission power control] le TPC étant effectué dans des situations particulières dans des systèmes à diversité de temps, d'espace, de fréquence ou de polarisation
3.
Remote wiping for data transport, storage and retrieval
An input switching circuit dynamically connects, based on an input mapping table, input streams to inputs of a wavefront pre-transform circuit. An output switching circuit dynamically connects, based on an output mapping table, output data at outputs of the wavefront pre-transform circuit to transport streams. A controller controls, based on a wiping command, at least one of the input and output switching circuits to alter at least one of the input and output mapping tables such that the at least one of the input and output switching circuits is disabled for connection. A first subset of the transport streams operates in a foreground mode available to a user and is transported for storage in remote storage sites at a network and a second subset of the transport streams operates in a background mode available to an administrator and is not transported for storage in the remote storage sites.
An active scattering device comprises a set of N identical single chain RF devices functioning as repeaters or transponders, which are placed adjacent to each other and in parallel over an area of active scattering, where N is an integer ≥2. Each of the N identical RF devices includes a receiving aperture, having a first coverage, for receiving a first signal within the first coverage; and a transmitting aperture, having a second coverage, for re-radiating a second signal within the second coverage, the second signal being received by one of the respective receiving apertures of the N identical RF devices. In various embodiments, the active scattering device is configured to function as a reflective directional repeater/transponder, or a retro-directive repeater/transponder, or a 2-D directional repeater/transponder that is retro-directive in a first dimension and reflective in a second dimension perpendicular to the first dimension.
A source terminal for communications with a destination terminal, both located near or on earth surface, via satellite links to a cluster of satellites in corresponding slightly inclined Geostationary Satellite Orbits (GSOs). The source terminal comprises a transmitter which includes a preprocessor to perform a K-muxing transform on M concurrent input data streams to generate concurrently M output data streams, M>1, each of the M output data streams being a linear combination of the M concurrent input data streams, the K-muxing transform having an inverse transform; a bank of modulators to transform the M output data streams into N signal streams destined for the destination terminal, N≤M; and a multibeam antenna system to dynamically track and communicate with the cluster of satellites. The multibeam antenna system transforms the N signal streams into shaped beams and radiates the shaped beams towards the cluster of satellites.
For data writing, a first input device performs a first wavefront multiplexing transform on a first input stream and a first probing stream to generate L first intermediate streams. An en-route processing device generates J output streams from the stored L first intermediate streams and at least a second probing stream. For data reading, an en-route processing device generates L first intermediate streams and at least a first recovered probing stream from J input streams including a first stored probing stream. The L first intermediate streams are stored in a first storage site. A first output device performs a first wavefront demultiplexing transform on the L first intermediate streams to generate a first output stream and a second recovered probing stream. The J input streams are stored in a distributed storage structure having at least a second storage site that stores P of the J input streams.
An apparatus comprises an antenna array having N elements to receive N input streams from a plurality of transmitters and a post-processing device to perform a wavefront de-multiplexing transform on the N input streams corresponding to M orthogonal beams to generate M output streams using a weight matrix having M beam weight vectors (BWVs) associated with the M orthogonal beams, where M and N are positive integers and 1
H04K 1/10 - Communications secrètes en utilisant deux signaux transmis simultanément ou successivement
G06F 3/06 - Entrée numérique à partir de, ou sortie numérique vers des supports d'enregistrement
H04J 99/00 - Matière non prévue dans les autres groupes de la présente sous-classe
H04B 7/06 - Systèmes de diversitéSystèmes à plusieurs antennes, c.-à-d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station d'émission
H04L 29/08 - Procédure de commande de la transmission, p.ex. procédure de commande du niveau de la liaison
9.
Systems for surveillance using airborne platforms as receiving platforms for bistatic radars
A system comprises a ground hub and a mobile airborne platform hovering over or close to a coverage area on or near the earth surface. A bistatic radar receiver on the airborne platform includes a first antenna system to capture reflected radiofrequency signals originated from a satellite via reflected paths from the coverage area; and a second antenna system to transmit the reflected radiofrequency signals to the ground hub via a feeder link. At the ground hub, a multibeam antenna system receives the reflected radiofrequency signals and captures radiation signals directly from the satellite via a direct path; and a remote beam forming network remotely forms receiving beams for the first antenna system. A remote radar processing center includes a cross-correlator to receive the reflected radiofrequency signals and the radiation signals as two input signal streams, perform cross-correlations between the two input signal streams, and output an output signal stream.
For data writing, a first wavefront multiplexing (WFM) processor performs WFM on M input streams to generate N output streams. A pre-processor segments or codes a source stream to produce the M input streams. For data reading, a first wavefront demultiplexing (WFD) processor performs WFD on M input streams to generate N output streams. A post-processor de-segments or decodes the N output streams into a source stream.
H04L 29/08 - Procédure de commande de la transmission, p.ex. procédure de commande du niveau de la liaison
G06F 3/06 - Entrée numérique à partir de, ou sortie numérique vers des supports d'enregistrement
G06F 11/20 - Détection ou correction d'erreur dans une donnée par redondance dans le matériel en utilisant un masquage actif du défaut, p. ex. en déconnectant les éléments défaillants ou en insérant des éléments de rechange
11.
Multi-channel communications system using mobile airborne platforms
A communications system includes a ground hub, mobile airborne platforms, and a user terminal. The ground hub includes an antenna system, a beam-forming system and a baseband processor. The antenna system receives return-link signals radiated respectively by the mobile airborne platforms. The return-link signals correspond to signal streams transmitted by the user terminal and received by the mobile airborne platforms. The signal streams correspond to data streams including a known pilot code stream. The beam-forming system forms beams to receive the return-link signals and transforms the received return-link signals into baseband signals. The baseband processor includes adaptive equalizers to equalize the baseband signals and a wavefront demultiplexing processor to perform a wavefront demultiplexing transform on the equalized baseband signals to produce recovered versions of the data streams.
H04B 7/208 - Accès multiple par division de fréquence
H04W 4/90 - Services pour gérer les situations d’urgence ou dangereuses, p. ex. systèmes d’alerte aux séismes et aux tsunamis
H04B 7/06 - Systèmes de diversitéSystèmes à plusieurs antennes, c.-à-d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station d'émission
For signal transmission, a pre-processing device performs a wavefront multiplexing (WVM) transform on M input streams corresponding to M orthogonal beams to generate N output streams using a weight matrix having M beam weight vectors (BWVs) associated with the M orthogonal beams. An antenna array having N elements transmits the N output streams to a plurality of receivers. For signal reception, an antenna array having N elements receives N input streams from a plurality of transmitters. A post-processing device performs a wavefront de-multiplexing (WVD) transform on the N input streams corresponding to M orthogonal beams to generate M output streams using a weight matrix having M beam weight vectors (BWVs) associated with the M orthogonal beams. M and N are positive integers and 1
H04K 1/10 - Communications secrètes en utilisant deux signaux transmis simultanément ou successivement
H04B 7/06 - Systèmes de diversitéSystèmes à plusieurs antennes, c.-à-d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station d'émission
H04J 99/00 - Matière non prévue dans les autres groupes de la présente sous-classe
G06F 3/06 - Entrée numérique à partir de, ou sortie numérique vers des supports d'enregistrement
H04L 29/08 - Procédure de commande de la transmission, p.ex. procédure de commande du niveau de la liaison
13.
Architectures and methods for novel antenna radiation optimization via feed repositioning
An antenna system includes N movable antenna elements configured to generate concurrently M receiving beams pointing respectively at M satellites radiating in a common frequency band, N and M being integers and N≥M≥2. A beam forming system is coupled to the N movable antenna elements and configured to shape the M receiving beams using weights inputted from a beam controller. The beam controller optimizes the M receiving beams by computing spatial displacements to spatially reposition the N movable antenna elements relative to each other, using an iterative optimization processing to satisfy a plurality of constraints concurrently. A position driver system spatially re-positions the N movable antenna elements in accordance to the spatial displacements inputted from the beam controller.
H01Q 3/06 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne utilisant un mouvement mécanique de l'ensemble d'antenne ou du système d'antenne pour faire varier une coordonnée de l'orientation dans un angle limité
H01Q 3/04 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne utilisant un mouvement mécanique de l'ensemble d'antenne ou du système d'antenne pour faire varier une coordonnée de l'orientation
H01Q 19/13 - Combinaisons d'éléments actifs primaires d'antennes avec des dispositifs secondaires, p. ex. avec des dispositifs quasi optiques, pour donner à une antenne une caractéristique directionnelle désirée utilisant des surfaces réfléchissantes où les surfaces sont concaves la source rayonnante primaire étant un élément rayonnant unique, p. ex. un dipôle, une fente, une terminaison de guide d'onde
H01Q 19/10 - Combinaisons d'éléments actifs primaires d'antennes avec des dispositifs secondaires, p. ex. avec des dispositifs quasi optiques, pour donner à une antenne une caractéristique directionnelle désirée utilisant des surfaces réfléchissantes
H01Q 3/40 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la phase relative ou l’amplitude relative et l’énergie d’excitation entre plusieurs éléments rayonnants actifsDispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la distribution de l’énergie à travers une ouverture rayonnante faisant varier la phase par des moyens électriques avec une matrice faisant varier l'angle de déphasage
H01Q 19/12 - Combinaisons d'éléments actifs primaires d'antennes avec des dispositifs secondaires, p. ex. avec des dispositifs quasi optiques, pour donner à une antenne une caractéristique directionnelle désirée utilisant des surfaces réfléchissantes où les surfaces sont concaves
14.
Ground terminals via remote digital-beam-forming networks for satellites in non-geostationary orbit
A receiving terminal for communication via NGSO satellites comprises an outdoor unit coupled to an indoor unit via optical fibers. The outdoor unit comprises an array antenna for capturing signals from the satellites; low-noise amplifiers; analog-to-digital conversion blocks for converting the captured signals to digital signals; a pre-processor for performing a wavefront multiplexing transform on the digital signals and generating wavefront multiplexed signals; and RF-to-optical drivers for transforming the wavefront multiplexed signals to optical waveforms. The indoor unit comprises optical-to-RF converters for optical demodulating the optical waveforms to recover the wavefront multiplexed signals; a post-processor for performing a wavefront demultiplexing transform on the wavefront multiplexed signals to recover the digital signals, the wavefront demultiplexing transform being an inverse of the wavefront multiplexing transform; a remote digital beam-forming network for generating receive beam signals from the recovered digital signals; and RF demodulators for generating data streams from the receive beam signals.
H04B 7/0452 - Systèmes MIMO à plusieurs utilisateurs
H04B 7/06 - Systèmes de diversitéSystèmes à plusieurs antennes, c.-à-d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station d'émission
H04B 10/2575 - Radio sur fibre, p. ex. signal radio modulé en fréquence sur une porteuse optique
H04N 7/20 - Adaptations pour la transmission sur une bande de fréquence du domaine des GHz, p. ex. par satellite
H04L 27/26 - Systèmes utilisant des codes à fréquences multiples
H04W 52/42 - Commande de puissance d'émission [TPC Transmission power control] le TPC étant effectué dans des situations particulières dans des systèmes à diversité de temps, d'espace, de fréquence ou de polarisation
15.
Digital enveloping for digital right management and re-broadcasting
An apparatus includes a memory storing a digital envelope and a wavefront demultiplexing (WFD) device which receives M input streams concurrently, M being an integer greater than 1, performs a WFD transformation on the M input streams, and generates M output streams concurrently. A first input stream includes wavefront multiplexed digital identifiers for digital right management. A second input stream is the digital envelope. The first input stream presented in a digital format appears to human perception as having identical features to the digital envelope presented in the digital format. Each output stream is a linear combination of the M input streams such that the digital identifiers are recovered from at least one of the M output streams. The digital envelope is a data file used by a sender to send the M input streams and is scaled with a magnification factor greater than 1 in the WFD transformation.
H04N 13/161 - Encodage, multiplexage ou démultiplexage de différentes composantes des signaux d’images
G06F 21/62 - Protection de l’accès à des données via une plate-forme, p. ex. par clés ou règles de contrôle de l’accès
H04L 29/06 - Commande de la communication; Traitement de la communication caractérisés par un protocole
H04N 21/434 - Désassemblage d'un flux multiplexé, p. ex. démultiplexage de flux audio et vidéo, extraction de données additionnelles d'un flux vidéoRemultiplexage de flux multiplexésExtraction ou traitement de SIDésassemblage d'un flux élémentaire mis en paquets
G06Q 20/12 - Architectures de paiement spécialement adaptées aux systèmes de commerce électronique
16.
Data transport privacy and redundancy via small UAVs in cooperation
A communication system includes (1) a first airborne linear array configured to project a first fan beam over a first ground coverage elongated in a first direction, the first fan beam delivering a first information data associated with a first data stream; and (2) a second airborne linear array configured to project a second fan beam over a second ground coverage elongated in a second direction, the second fan beam delivering a second information data associated with a second data stream. The first and second ground coverages are overlapped to form a common coverage area. The first and second data streams are complementary to each other and are linear combinations of a plurality of segmented substreams. The plurality of segmented substreams is formed from an information data stream. The first and second data streams are generated from a ground control facility.
A communication system includes a transmitter and remote receivers having each a set of receive elements. The transmitter includes a preprocessor and a set of transmit elements which radiate shaped beams including probing signals through a multipath communication channel. The preprocessor computes channel state information based on received responses to the probing signals, generate composited transfer functions based on the channel state information, generate the shaped beams based on the composited transfer functions, and process a plurality of input signals to be transmitted via the shaped beams to the remote receivers. The channel state information includes transfer functions, each characterizing at least one propagation path from one transmit element to one receive element. Each composited transfer function is a linear combination of the transfer functions. Each receive element is identified by a user element identification index in the transfer functions. Each remote receiver is identified by a user identification index.
H04B 7/06 - Systèmes de diversitéSystèmes à plusieurs antennes, c.-à-d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station d'émission
H04L 5/00 - Dispositions destinées à permettre l'usage multiple de la voie de transmission
A broadband linear processing system includes a pre-processing module and a set of M linear processors coupled to the pre-processing module, M being an integer greater than 1. The pre-processing module includes a wavefront multiplexer having M input ports and M output ports. The wavefront multiplexer receives M input signals at the M input ports, performs a wavefront multiplexing transform on the M input signals and outputs M narrowband signal streams at the M output ports. The wavefront multiplexing transform has an inverse. Each of the M linear processors receives and processes a corresponding one of the M narrowband signal streams, and outputs a corresponding one of M processed narrowband signal streams.
H04J 14/02 - Systèmes multiplex à division de longueur d'onde
H03F 1/02 - Modifications des amplificateurs pour augmenter leur rendement, p. ex. étages classe A à pente glissante, utilisation d'une oscillation auxiliaire
H03F 1/32 - Modifications des amplificateurs pour réduire la distorsion non linéaire
H03F 3/21 - Amplificateurs de puissance, p. ex. amplificateurs de classe B, amplificateur de classe C comportant uniquement des dispositifs à semi-conducteurs
H03F 3/24 - Amplificateurs de puissance, p. ex. amplificateurs de classe B, amplificateur de classe C d'étages transmetteurs de sortie
H03F 3/68 - Combinaisons d'amplificateurs, p. ex. amplificateurs à plusieurs voies pour stéréophonie
H03F 3/72 - Amplificateurs commandés, c.-à-d. amplificateurs mis en service ou hors service au moyen d'un signal de commande
H04B 10/118 - Dispositions spécifiques à la transmission en espace libre, c.-à-d. dans l’air ou le vide spécialement adaptées aux communications par satellite
19.
Resource allocation via wave-front multiplexing in a PON network
A data communication system comprises an optical transferring device, optical network units, and user processors. The optical transferring device splits a received optical signal into split optical signals. Each optical network unit transforms a respective split optical signal into M first electronic signals, M>1. Each user processor comprises an input mapping unit to map the respective M first electronic signals into N second electronic signals, N≥M; an equalization processor to equalize the N second electronic signals and generate a set of N equalized electronic signals; a wave-front demultiplexer to perform a wave-front demultiplexing transform on the N equalized electronic signals, and output N wave-front demultiplexed signals, each of the N wave-front demultiplexed signals being a unique linear combination of the N equalized electronic signals; and an output mapping unit to map the N wave-front demultiplexed signals into at least M third digital electronic data signals.
H04J 14/02 - Systèmes multiplex à division de longueur d'onde
H04Q 11/00 - Dispositifs de sélection pour systèmes multiplex
H04J 14/08 - Systèmes multiplex à division de temps
H04B 10/071 - Dispositions pour la surveillance ou le test de systèmes de transmissionDispositions pour la mesure des défauts de systèmes de transmission utilisant un signal réfléchi, p. ex. utilisant des réflectomètres optiques temporels [OTDR]
th input port. The pre-processor generates P output streams from the P-1 substreams and the second stream using a P-to-P K-muxing operation. The P output streams are uploaded to a cloud storage via a network. Redundancy of the P output streams recovered by a user from the cloud storage is based on whether the second stream is accessible to the user.
A system includes a ground hub and a mobile airborne platform hovering over or close to a coverage area on or near the earth surface. The mobile airborne platform comprises a bistatic radar receiver including an antenna system to capture first radiofrequency signals originated from a first satellite and second radiofrequency signals originated from a second satellite, via direct paths and via reflected paths from the coverage area. The mobile airborne platform transmits the captured first and second radiofrequency signals to a ground hub via a feeder link. The ground hub includes a remote beam forming network to remotely form receiving beams for the antenna system of the bistatic radar receiver to capture the first and second radiofrequency signals, and a remote radar processing center to transform the captured first and second radiofrequency signals into a first and a second two-dimensional radiofrequency image, respectively.
H04B 7/06 - Systèmes de diversitéSystèmes à plusieurs antennes, c.-à-d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station d'émission
H04W 4/90 - Services pour gérer les situations d’urgence ou dangereuses, p. ex. systèmes d’alerte aux séismes et aux tsunamis
A method and a system for reducing undesired interference in a target zone. A set of M pickup sensors pick up undesired signals in real time and generate M pickup signals, M being an integer greater than or equal to 1. A beam forming network coupled to the M pickup sensors comprises a receiving beam forming module and a transmitting beam forming module. The receiving beam forming module receives the M pickup signals and generates K beam signals, K being an integer greater than or equal to 1. The transmitting beam forming module receives the K beam signals and generates N interference signals, N being an integer greater than 1. A set of N injectors coupled to the transmitting beam forming module receives the N interference signals, respectively, and radiates the N interference signals to the target zone.
G10K 11/178 - Procédés ou dispositifs de protection contre le bruit ou les autres ondes acoustiques ou pour amortir ceux-ci, en général utilisant des effets d'interférenceMasquage du son par régénération électro-acoustique en opposition de phase des ondes acoustiques originales
G10K 11/34 - Procédés ou dispositifs pour transmettre, conduire ou diriger le son pour focaliser ou pour diriger le son, p. ex. balayage par commande électrique de systèmes de transducteurs, p. ex. en dirigeant un faisceau acoustique
A communication system includes a transmitter, one or more active scattering platforms, and one or more remote receivers. The transmitter includes a beam forming network for transforming M signals into a set of shaped beams which are radiated toward the active scattering platforms by transmitter antenna elements. The active scattering platforms receive and re-radiate one or more of the radiated shaped beams toward the receivers. The beam forming network optimizes composite transfer functions under performance constraints. Each composite transfer function is a linear combination of transfer functions. Each transfer function characterizes propagation paths from one transmitter antenna element to one receiving antenna element. Each receiving antenna element is identified by a user element identification index in the transfer functions. Each receiver is identified by a user identification index. The performance constraints are specified for locations identified by the user identification indices or the user element identification indices.
H04B 7/06 - Systèmes de diversitéSystèmes à plusieurs antennes, c.-à-d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station d'émission
A power amplification system comprises a pre-processor including a wavefront multiplexer, a set of power amplifiers, and a post-processor including a wavefront demultiplexer. The wavefront multiplexer receives concurrently N input signals, N being an integer greater than 2, performs a wavefront multiplexing transform on the N input signals by attaching N wavefronts to the N input signals respectively, and generates N first output signals. The N wavefronts are unique and mutually orthogonal. The wavefront multiplexing transform has an inverse. The N power amplifiers amplify the N first output signals and generate N amplified signals. The wavefront demultiplexer performs the inverse of the wavefront multiplexing transform on the N amplified signals and generates N second output signals, the N second output signals corresponding respectively to the N input signals. Each of the N second output signals is an amplified version of a corresponding one of the N input signals.
H03F 3/21 - Amplificateurs de puissance, p. ex. amplificateurs de classe B, amplificateur de classe C comportant uniquement des dispositifs à semi-conducteurs
H03F 1/02 - Modifications des amplificateurs pour augmenter leur rendement, p. ex. étages classe A à pente glissante, utilisation d'une oscillation auxiliaire
H03F 3/68 - Combinaisons d'amplificateurs, p. ex. amplificateurs à plusieurs voies pour stéréophonie
H03F 3/72 - Amplificateurs commandés, c.-à-d. amplificateurs mis en service ou hors service au moyen d'un signal de commande
H03F 1/32 - Modifications des amplificateurs pour réduire la distorsion non linéaire
H03F 3/24 - Amplificateurs de puissance, p. ex. amplificateurs de classe B, amplificateur de classe C d'étages transmetteurs de sortie
25.
Channel bonding using K-muxing and multiple-beam antenna
A user terminal for transmitting data to a plurality of access points comprises a pre-processor to pre-process at least one source data stream and a multi-beam antenna. The pre-processor comprises a segmenting device to segment the at least one source data stream into a set of N data sub streams, N being an integer greater than 1; a K-muxing unit to perform a N-to-N K-muxing transform on the N data substreams to generate N K-muxed data streams, each of the N K-muxed data streams being a linear combination of the N data substreams; and a bank of modulators to modulate the N K-muxed data streams to generate N K-muxed signal streams. The multi-beam antenna comprises beam forming networks to transform the N K-muxed signal streams into transmit beams, and an array of antenna elements to transmit the transmit beams to the access points.
H01Q 3/26 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la phase relative ou l’amplitude relative et l’énergie d’excitation entre plusieurs éléments rayonnants actifsDispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la distribution de l’énergie à travers une ouverture rayonnante
H01Q 3/28 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la phase relative ou l’amplitude relative et l’énergie d’excitation entre plusieurs éléments rayonnants actifsDispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la distribution de l’énergie à travers une ouverture rayonnante faisant varier l'amplitude
H01Q 1/00 - Détails de dispositifs associés aux antennes
H01Q 1/22 - SupportsMoyens de montage par association structurale avec d'autres équipements ou objets
H01Q 3/24 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier l'orientation, par commutation de l'énergie fournie, d'un élément actif rayonnant à un autre, p. ex. pour commutation du lobe
H01Q 25/00 - Antennes ou systèmes d'antennes fournissant au moins deux diagrammes de rayonnement
H01Q 3/36 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la phase relative ou l’amplitude relative et l’énergie d’excitation entre plusieurs éléments rayonnants actifsDispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la distribution de l’énergie à travers une ouverture rayonnante faisant varier la phase par des moyens électriques avec des déphaseurs variables
H01Q 3/40 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la phase relative ou l’amplitude relative et l’énergie d’excitation entre plusieurs éléments rayonnants actifsDispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la distribution de l’énergie à travers une ouverture rayonnante faisant varier la phase par des moyens électriques avec une matrice faisant varier l'angle de déphasage
A data communication system comprises a central office processor which comprises a first input mapping unit, a first wave-front multiplexer, and a first output mapping unit. The first input mapping unit receives and dynamically maps digital data into a plurality of first electronic signals. The first wave-front multiplexer is coupled to the first input mapping unit to receive the first electronic signals, perform a wave-front multiplexing transformation on the first electronic signals, and output wave-front multiplexed signals, each of the wave-front multiplexed signals being a linear combination of the first electronic signals. The first output mapping unit is coupled to the first wave-front multiplexer to receive and dynamically map the wave-front multiplexed signals into second electronic signals.
H04J 14/08 - Systèmes multiplex à division de temps
H04B 10/071 - Dispositions pour la surveillance ou le test de systèmes de transmissionDispositions pour la mesure des défauts de systèmes de transmission utilisant un signal réfléchi, p. ex. utilisant des réflectomètres optiques temporels [OTDR]
27.
Accessing CP channels with LP terminals via wavefront multiplexing
An apparatus comprises a wavefront muxing processor receiving first and second input signals to generate first and second output signals on first and second communication channels, respectively, the first and second output signals being at a common frequency slot and having relative differential amplitude and phase delays; and an amplitude and phase adjustment element located at one of the first and second communication channels to adjust the relative differential amplitude and phase delays using an adjustment amount to reduce interference in the first and second communication channels. The first output signal is a weighted sum of the first input signal and the second input signal that is phase shifted by a second phase shift. The second output signal is a weighted sum of the second input signal and the first input signal that is phase shifted by a first phase shift. The two output signals are transmitted to a transponder.
H01Q 21/24 - Combinaisons d'unités d'antennes polarisées dans des directions différentes pour émettre ou recevoir des ondes polarisées circulairement ou elliptiquement ou des ondes polarisées linéairement dans n'importe quelle direction
A communications system for providing recovery communication service to users in a coverage area affected by an emergency disruption of normal communication services. The system comprises a ground hub serving as a gateway to terrestrial networks including a dispatch center and configured to communicate with at least three mobile airborne platforms roving over the coverage area via respective feeder-links in a Ku or Ka band. A first mobile airborne platform communicates in a first frequency band with emergency workers that are working in the coverage area and associated with the dispatch center. A second mobile airborne platform communicates, in place of at least one disrupted base station in the coverage area, with user mobile phones in mobile phone frequency bands or user personal devices in WiFi bands located in the coverage area. A third mobile airborne platform generates real-time imaging of surfaces located in the coverage area.
Enveloping techniques using incoherent wavefront multiplexing (WF muxing or K-muxing) will enhance privacy protection on data communications. The disclosure relates to methods and architectures of packing or enveloping data using WF muxing, or K-muxing, for information transport via multiple communication links such as concurrently via multiple satellites, airborne platforms, wireless terrestrial links, and/or other wireless links. The multi-link communications may include the use of cloud transport of multiple WF-muxed data packages. It is focused to appearance of a digital envelop and reliability of enclosed data. The K-muxing on information digital streams before modulation in a transmitter shall provide enhanced data privacy and better availability. The WF multiplexed (WF muxed or K-muxed) information data streams will be individually and concurrently sent to the multiple links accordingly for data transport. The corresponding WF demuxing or K-demuxing will be performed on received K-muxed information digital stream after demodulation in a receiver. The terms of information data or digital information streams are used to differentiate them from those of data signals or digital signal streams. In a transmission, information data usually will be modulated by modulators and converted into data signals before being transmitted. Similarly in a receiver, a received digital signal stream is demodulated by a demodulator and become a digital information stream. The incoherent K-muxing and K-demuxing will be used for processing information data or digital information streams for the benefits of enhanced privacy and better availability. On the other hand, the coherent K-muxing and K-demuxing for processing data signals or digital signal streams will be used for power combining and/or dynamic resource allocations for communications channels.
A portable device for wireless communication is disclosed. The portable device comprises an antenna array having N array elements distributed on and conforming to the surfaces of the portable device, N being an integer greater than 1. The N array elements output N signals to a frontend unit. The frontend unit receives the N signals and generates N digital signals. A digital beam forming network, coupled to the frontend unit, processes M digital signals selected from the N digital signals, M being an integer less than or equal to N, and generates K beams based on the M digital signals, K being an integer greater than 1. A controlling unit, coupled to the digital beam forming network, computes dynamically a beam weight vector for each of the K beams based on data on orientation and position of the portable device and data on geometry of the antenna array and hub directions. A position information unit, coupled to the controlling unit, generates the data on position and orientation of the portable device. A memory, coupled to the controlling unit, stores the data on geometry of the antenna array and hub directions.
H01Q 3/00 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne
H01Q 1/24 - SupportsMoyens de montage par association structurale avec d'autres équipements ou objets avec appareil récepteur
H04B 7/08 - Systèmes de diversitéSystèmes à plusieurs antennes, c.-à-d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station de réception
H01Q 3/24 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier l'orientation, par commutation de l'énergie fournie, d'un élément actif rayonnant à un autre, p. ex. pour commutation du lobe
H01Q 3/26 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la phase relative ou l’amplitude relative et l’énergie d’excitation entre plusieurs éléments rayonnants actifsDispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la distribution de l’énergie à travers une ouverture rayonnante
H01Q 21/20 - Réseaux d'unités d'antennes, de même polarisation, excitées individuellement et espacées entre elles les unités étant espacées le long d'un trajet curviligne ou adjacent à celui-ci
A communications system comprises a ground hub in a background area, aerial vehicles flying in a formation with slowly varying spacing between the aerial vehicles, and a user terminal in a region within a foreground area. The foreground area is spatially separate from the background area. The ground hub comprises a ground-based beam forming facility (GBBF) for receiving and transforming input signals into beam-formed signals, and a first antenna system coupled to the GBBF for transmitting concurrently the beam-formed signals in a first frequency band to respective aerial vehicles via respective background links. The aerial vehicles receive respectively the beam-formed signals via the background links and transmit respectively the beam-formed signals as respective signal beams covering at least the region within the foreground area in a second frequency band. The user terminal comprises a second antenna system for receiving concurrently the signal beams via foreground links to the aerial vehicles.
H04B 7/04 - Systèmes de diversitéSystèmes à plusieurs antennes, c.-à-d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées
A retro-directive antenna system on a mobile airborne platform for communication with a ground hub located within a coverage area. The system comprises an antenna array, a receive beamforming network, and a diagnostic processor. The antenna array comprises a plurality of antenna elements. The receive beamforming network generates concurrently a plurality of receive beams for the respective antenna elements. The receive beams correspond to respective beam positions within the coverage area. A first beam position points to the ground hub and a corresponding receive beam receives a target signal from the ground hub. The diagnostic processor determines a best position for the first beam position based on a ranking system and controls the receive beamforming network by updating the beam positions based on the best position for the first beam position.
H04B 7/06 - Systèmes de diversitéSystèmes à plusieurs antennes, c.-à-d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station d'émission
A satellite communications system for communicating at a first frequency slot with first and second pairs of satellite transponders in linear polarization format. The system comprises a first terminal, a second terminal and a station. The first terminal receives at least one first input signal and concurrently radiates a first output signal at the first frequency slot to the first and second pairs of satellite transponders via a first beam and a second beam, respectively, in right-hand circularly polarized format. The second terminal receives at least one second input signal and concurrently radiates a second output signal at the first frequency slot to the first and second pairs of satellite transponders via a third beam and a fourth beam, respectively, in left-hand circularly polarized format. The station receives four satellite signals from the first and second pairs of transponders and recovers the at least one first input signal and the at least one second input signal using wavefront multiplexing technique.
H01Q 21/24 - Combinaisons d'unités d'antennes polarisées dans des directions différentes pour émettre ou recevoir des ondes polarisées circulairement ou elliptiquement ou des ondes polarisées linéairement dans n'importe quelle direction
H01Q 3/24 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier l'orientation, par commutation de l'énergie fournie, d'un élément actif rayonnant à un autre, p. ex. pour commutation du lobe
H04B 7/06 - Systèmes de diversitéSystèmes à plusieurs antennes, c.-à-d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station d'émission
H04L 5/00 - Dispositions destinées à permettre l'usage multiple de la voie de transmission
H04L 5/02 - Canaux caractérisés par le type de signal
H04W 24/02 - Dispositions pour optimiser l'état de fonctionnement
Presented are cloud storage architectures for private data among terminals with enhanced capability of data privacy and survivability. Pre-processing for storing data in IP cloud comprises: transforming multiple first data sets into multiple second data sets at an uploading site, wherein one of said second data sets comprises a weighted sum of said first data sets; storing said second data sets in an IP cloud via IP connectivity; and storing multiple data storages linking to said second data sets at said uploading site. In accordance with an embodiment post processing may comprise recovering said second data sets at a downloading site via IP network.
Four independent technologies are incorporated in this invention to efficiently and cost effectively implement dynamic last mile connectivity. The four technologies are passive optical networks (PON), Small cell, wavefront multiplexing (or K-muxing), and digital beam forming (DBF). We have filed US patents for communications architectures featuring K-muxing overlaid over low cost of PON. Those inventions relate particularly to resource allocation in passive optical networks (PON) via wavefront multiplexing (WF-muxing or K-muxing) and wavefront demultiplexing (WF-demuxing or K-demuxing). The “WF-muxing in PON” can be configured for performing remote digital beam forming (RDBF) over a service area covered by multiple small cells. The RDBF may generate multiple shaped beams with enhanced connectivity and better isolations over a same frequency slot concurrently to serve multiple users over the coverage area.
H04B 7/06 - Systèmes de diversitéSystèmes à plusieurs antennes, c.-à-d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station d'émission
H04B 10/2575 - Radio sur fibre, p. ex. signal radio modulé en fréquence sur une porteuse optique
Presented are cloud storage architectures for private data of scanned documents uploaded from smart phone among terminals with enhanced capability of data privacy and survivability. Pre-processing for storing data in IP cloud comprises: transforming multiple first data sets into multiple second data sets at an uploading site, wherein one of said second data sets comprises a weighted sum of said first data sets; storing said second data sets in an IP cloud via IP connectivity; and storing data in multiple data storages linking to said second data sets at said uploading site. In accordance with an embodiment of present invention post processing may comprise recovering said second data sets at a downloading site via IP network.
A system for reducing undesired interference in a target zone is disclosed. The system comprises a set of M pickup sensors, a beam forming network coupled to the M pickup sensors, and a set of N injectors coupled to the beam forming network. The M pickup sensors pick up undesired signals in real time and generate M pickup signals, M being an integer greater than or equal to 1. The beam forming network comprises a set of M beam forming modules. Each of the M beam forming modules receives a respective one of the M pickup signals and generates N intermediate signals, N being an integer greater than 1. The N intermediate signals generated by each of the M beam forming modules are combined correspondingly with remaining intermediate signals generated by remaining M−1 beam forming modules to generate N interference signals. The N injectors receive and radiate the N interference signals to the target zone.
G10K 11/178 - Procédés ou dispositifs de protection contre le bruit ou les autres ondes acoustiques ou pour amortir ceux-ci, en général utilisant des effets d'interférenceMasquage du son par régénération électro-acoustique en opposition de phase des ondes acoustiques originales
38.
Broadband digital beam forming system including wavefront multiplexers and narrowband digital beam forming modules
A broadband digital beam forming system comprises a set of Q pre-processing modules, Q being an integer greater than or equal to 2, and a set of M digital beam forming modules in communication with the Q preprocessing modules. Each of the Q preprocessing modules receives a respective one of Q broadband input signal streams and outputs M narrowband signal streams, M being an integer greater than or equal to 2. The total number of narrowband signal streams outputted by the Q pre-processing modules is Q times M. Each of the M digital beam forming modules receives corresponding Q narrowband signal streams of the Q times M narrowband signal streams, and outputs R beam signals, R being an integer greater than or equal to 1. The system further comprises a set of R post-processing modules in communication with the M digital beam forming modules. Each of the R post-processing modules receives M beam signals, each of the M beam signals being a corresponding one of the R beam signals from each of the M digital beam forming modules, and outputs a corresponding broadband output signal.
H04J 14/02 - Systèmes multiplex à division de longueur d'onde
H03F 1/02 - Modifications des amplificateurs pour augmenter leur rendement, p. ex. étages classe A à pente glissante, utilisation d'une oscillation auxiliaire
H03F 1/32 - Modifications des amplificateurs pour réduire la distorsion non linéaire
H03F 3/21 - Amplificateurs de puissance, p. ex. amplificateurs de classe B, amplificateur de classe C comportant uniquement des dispositifs à semi-conducteurs
H03F 3/24 - Amplificateurs de puissance, p. ex. amplificateurs de classe B, amplificateur de classe C d'étages transmetteurs de sortie
H03F 3/68 - Combinaisons d'amplificateurs, p. ex. amplificateurs à plusieurs voies pour stéréophonie
H03F 3/72 - Amplificateurs commandés, c.-à-d. amplificateurs mis en service ou hors service au moyen d'un signal de commande
H04B 10/118 - Dispositions spécifiques à la transmission en espace libre, c.-à-d. dans l’air ou le vide spécialement adaptées aux communications par satellite
39.
Analog-to-digital conversion with noise injection via wavefront multiplexing techniques
An analog-to-digital conversion system includes a first processor, a bank of N analog-to-digital converters, and a second processor. The first processor receives M input signal streams, performs a wave-front multiplexing transform that includes a first set of wave-front vectors on the M input signal streams in analog domain and outputs concurrently N mixed signal streams, M and N being integers and N≧M>1. The N analog-to-digital converters convert the N mixed signal streams from analog format to digital format and output concurrently N digital data streams. The second processor receives the N digital data streams, performs a wave-front de-multiplexing transform that includes a second set of wave-front vectors on the N digital data streams in digital domain and outputs concurrently N output data streams such that the N output data streams include M output data streams that correspond respectively to the M input signal streams.
An antenna system comprises: multiple antenna elements; and multiple beam forming networks configured to produce radiation patterns for both receiving and transmission functions configured to be optimized by re-positioning said antenna elements, wherein said beam forming networks comprise a receiving beam forming network configured to combine multiple first inputs from said antenna elements into at least a first output, and a transmission beam forming network configured to divide a second input into multiple second outputs to said antenna elements.
H01Q 3/06 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne utilisant un mouvement mécanique de l'ensemble d'antenne ou du système d'antenne pour faire varier une coordonnée de l'orientation dans un angle limité
H01Q 3/04 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne utilisant un mouvement mécanique de l'ensemble d'antenne ou du système d'antenne pour faire varier une coordonnée de l'orientation
H01Q 19/10 - Combinaisons d'éléments actifs primaires d'antennes avec des dispositifs secondaires, p. ex. avec des dispositifs quasi optiques, pour donner à une antenne une caractéristique directionnelle désirée utilisant des surfaces réfléchissantes
H01Q 19/13 - Combinaisons d'éléments actifs primaires d'antennes avec des dispositifs secondaires, p. ex. avec des dispositifs quasi optiques, pour donner à une antenne une caractéristique directionnelle désirée utilisant des surfaces réfléchissantes où les surfaces sont concaves la source rayonnante primaire étant un élément rayonnant unique, p. ex. un dipôle, une fente, une terminaison de guide d'onde
H01Q 3/40 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la phase relative ou l’amplitude relative et l’énergie d’excitation entre plusieurs éléments rayonnants actifsDispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la distribution de l’énergie à travers une ouverture rayonnante faisant varier la phase par des moyens électriques avec une matrice faisant varier l'angle de déphasage
H01Q 19/12 - Combinaisons d'éléments actifs primaires d'antennes avec des dispositifs secondaires, p. ex. avec des dispositifs quasi optiques, pour donner à une antenne une caractéristique directionnelle désirée utilisant des surfaces réfléchissantes où les surfaces sont concaves
A compact patch antenna array for mobile terminal applications comprising: a plurality of radiators mounted on one surface of a dielectric, with a ground plane being mounted on the other side of the dielectric. Beneath the ground plane, another dielectric with feeding network is placed. Other embodiments are described and shown in FIG. 2.
H01Q 21/20 - Réseaux d'unités d'antennes, de même polarisation, excitées individuellement et espacées entre elles les unités étant espacées le long d'un trajet curviligne ou adjacent à celui-ci
42.
Multi-channel communication optimization methods and systems
Aircrafts flying near Earth or naval vessels are used as communications towers or relays. Using techniques of ground based beam forming and wavefront multiplexing enhance the ability to coherently combine the power of the communication signals, and improve the signal-to-noise ratio. When multiple antennas or signal sources exist, a ranking system is employed to optimize performance.
A receiver with orthogonal beam forming technique is achieved that is capable of differentiating different signal components within the received composite signal. An adaptive processor is used to eliminate the signal component whose phase information is known or can be calculated. The phase information of the major component of a signal can be easily acquired by using a limiter. The phase information of other signal components can be acquired by their direction information and other characteristics, such as modulation scheme, etc. Multiple orthogonal beams can be formed by eliminating one unwanted signal component each time by the adaptive processor until all unwanted signal is eliminated. Thus, a composite signal from multiple sources can be broken down into their component signals.
A novel noise injection technique is presented to improve dynamic range with low resolution and low speed analog to digital converters. This technique combines incoming signal and noise signal with wave front de-multiplexer and split into several channels. Then low resolution and low speed analog to digital converters are used to sample each channels. All signals are recovered using wave front multiplexer. For advanced design, ground diagnostic signals with optimizing processor can be added to guarantee recovery quality.
A data communication system comprises a wave-front multiplexer configured to wave-front multiplex first electronic signals into second electronic signals. The data communication system further comprises an electronic-to-optical converter configured to convert a third electronic signal carrying information associated with the second electronic signals into a first optical signal; and an optical transferring module configured to split the first optical signal into second optical signals, wherein each of the second optical signals carries the same data as the first optical signal carries. The data communication system further comprises optical-to-electronic converters configured to convert the second optical signals into fourth electronic signals; and wave-front demultiplexers each configured to wave-front demultiplex one of the fourth electronic signals into fifth electronic signals equivalent to the first electronic signals respectively.
A system comprises a plurality of personal devices identified by at least one remote storage network as belonging to a user. A personal device comprises a first folder for storing a known a priori digital file, a second folder for storing a data file, a processor, and a network interface. The processor performs an M-to-M waveform multiplexing transformation on M input files, M>1, and generates M output files. Each output file comprises a respective linear combination of the M input files. The M input files comprise the data file and the known a priori digital file. Each of the M output files appears to human perception as having substantially identical visual or audio features to the known a priori digital file. The network interface sends at least M−1 of the M output files to at least one destination in the at least one remote storage network for storage.
At a ground-based transmitting system, a first processor receives and performs an N-to-N wavefront-multiplexing (WFM) transform on N signals and outputs N WFM signals, N>1. The N WFM signals are orthogonal to one another and each of which is a unique linear combination of the N signals. The N-to-N WFM transform has a unique inverse. A transmit back-end transmits the N WFM signals over a transmission medium via propagation channels. At a user terminal, a receive front-end receives the N transmitted WFM signals and generates N received WFM signals. An equalizer generates N equalized signals from the N received WFM signals. A second processor performs the unique inverse of the N-to-N WFM transform on the N equalized signals and outputs N wavefront demultiplexed signals, each of which is a unique linear combination of the N equalized signals and is a recovered version of a respective one of the N signals.
H04W 52/34 - Gestion du TPC, c.-à-d. partage de la quantité limitée de puissance entre les utilisateurs ou les canaux ou encore les types de données, p. ex. charge des cellules
H04N 21/61 - Structure physique de réseauTraitement de signal
A system is provided for high speed optical fiber data transmission by generating artificial wavefronts along multiple paths exhibiting spatial mutual orthogonality. Multiple independent signal streams are “structured” over a group of different propagation paths that are coherently organized by wavefront multiplexing and dc-multiplexing techniques. Therefore, signal streams with enhanced throughput and reliability may be fully recovered at destinations via embedded diagnostic signals and optimization loops. Multiple optical channels are matched with multiple orthogonal wavefronts created by a signal pre-processor. A receiving end signal post-processor dynamically aligns propagation paths via diagnostic signals and orthogonality of the propagation wavefronts electronically. The multiple optical channels are coherently bonded into a single virtual channel, thereby increasing data bandwidth while reducing interference and unwanted multi-path effects. The wavefront multiplexing and de-multiplexing functions may be performed in a dedicated signal processor or may reside in a general-purpose microprocessor located in the user terminal.
A wireless communications system comprises a transmitting terminal, transponding repeaters located on moving airborne platforms, and receiving terminals located in a first coverage area and a second coverage area. The transmitting terminal comprises a preprocessing unit to receive information data streams, perform a wavefront multiplexing transformation on the information data streams, generate at least a first and a second wavefront multiplexed information data streams, and transmit the first and second wavefront multiplexed information data streams to the receiving terminals via the transponding repeaters. The transponding repeaters include first and second transponding repeaters, each of the transponding repeaters having an antenna array, the first transponding repeater having a first antenna array, receiving and relaying the first wavefront multiplexed information data stream to a first coverage area, the second transponding repeater having a second antenna array, receiving and relaying the second wavefront multiplexed information data stream to a second coverage area.
A communication system and method for a deep space spacecraft receiver to perform post-processing to dynamically combine received signal power coherently for pre-processed signal streams radiated non-coherently from a distributed, multiple element, Ka-band transmitting array via multiple concurrent propagation paths. Mutually orthogonal data and pilot signals travel though the multiple propagation paths. A pre-processor utilizing wavefront multiplexing restructures signal streams on the ground into multi-channel wavefrom structures along with injections of pilot signals for diagnostic and probing purposes. These restructured, or “wavefront multiplexed” (WFM) signals are transmitted through propagation channels to a receiver on the spacecraft, wherein adaptive equalization and wavefront de-multiplexing coherently separates the mixtures of received WFM signals. Transmitting power can be dynamically allocated for the multiple concurrent data streams, radiated to different spacecraft within the same field of view according to continuously changing demand by changing the relative input power ratios of the WFM signal mixtures.
Presented are MIMO communications architectures among terminals with enhanced capability of frequency reuse by strategically placing active scattering platforms at right places. These architectures will not depend on multipaths passively from geometry of propagation channels and relative positions of transmitters and those of receivers. For advanced communications which demand high utility efficiency of frequency spectrum, multipath effects are purposely deployed through inexpensive active scattering objects between transmitters and receivers enable a same frequency slot be utilized many folds such as 10×, 100× or even more. These active scatters are to generate favorable geometries of multiple paths for frequency reuse through MIMO techniques. These scatters may be man-made active repeaters, which can be implemented as small as 5 to 10 watt lightbulbs for indoor mobile communications such as in large indoor shopping malls. The architecting concept can be certainly implemented via mini-UAV platforms parking on tops of light-poles, or tree tops, or tops of stadiums, or circulating in small “figure-8” or small circles slowly. This systems can be pushed to facilitate >>100× frequency reuses among users. It may be one of possible solutions for 5G deployment and many other applications which needs high efficiency in frequency utility.
H04B 7/04 - Systèmes de diversitéSystèmes à plusieurs antennes, c.-à-d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées
H04B 7/06 - Systèmes de diversitéSystèmes à plusieurs antennes, c.-à-d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station d'émission
A novel terrestrial wireless communications technique for terrestrial portable terminals including hand-held mobile devices and fixed wireless instruments, utilizing a spoke-and-hub communications system, having a plurality of individual hubs and/or base-stations all in communications with the portable terminals. The portable terminals and the hubs are assigned to use incompatible polarity formats in terms of circularly polarity (CP) and linearly polarity (LP). In forward links, a signal processed by the LP ground telecommunications hubs is radiated through multiple antennas with various LP polarities to an individual CP user simultaneously. The multiple paths are organized via assignments of a plurality of polarities, frequency slots, and directions by wavefront multiplexing/demultiplexing techniques such that the same communications assets including frequency spectrum may be re-used by other users. The same polarity diversity methods can be extended to peer-to-peer communications.
Presented are methods that utilize wavefront multiplexing for enabling linearly-polarized terminals to access circularly-polarized satellite transponders. The methods disclosed herein feature (1) polarization formation capability that renders transmitted signal conditioned on circularly-polarized channels through multiple linearly-polarized feeds, and (2) polarization-conversion capability that compensate path differentials introduced by electromagnetic wave propagation channels. Data streams to be transmitted are pre-processed by a wavefront multiplexer into multiple wavefront components in linear polarization formats, where signals from respective data streams are replicated into linearly-polarized sub-channels. These replicated data streams are linked via a unique complex weighting vector (amplitude and phase or their equivalents), or “wavefront”, which are also linked by various spatially independent wavefronts. Additionally, a probing signal is sent on the transmitting side and linked via some of the independent wavefronts. Aggregated signals in linearly-polarized sub-channels are unique linear combinations of all input data streams. Aggregated signals in turn appear in circularly-polarized formats and propagate through circularly-polarized channels including circularly-polarized satellite transponders and a circularly-polarized teleport on the receiving side. Correlation between the circularly-polarized signal and the probing signal is sent back to the transmitting side that drives the polarization-conversion function toward the optimal state such that this correlation is lower than a pre-defined level. Accordingly, an optimally configured satellite communication system either (1) enables the linearly-polarized terminal on the transmitting side to access right-hand circularly-polarized satellite transponder without interfering the left-hand circularly-polarized satellite transponder, or (2) enables the linearly-polarized terminal on the transmitting side to access left-hand circularly-polarized satellite transponder without interfering the right-hand circularly-polarized satellite transponder.
H01Q 21/24 - Combinaisons d'unités d'antennes polarisées dans des directions différentes pour émettre ou recevoir des ondes polarisées circulairement ou elliptiquement ou des ondes polarisées linéairement dans n'importe quelle direction
A system for processing data streams or signals includes a wave-front multiplexer configured to process first and second input signals into first and second output signals each carrying information associated with the first and second input signals, a first processing unit configured to process a third input signal carrying information associated with the first output signal into a third output signal, a second processing unit configured to process a fourth input signal carrying information associated with the second output signal into a fourth output signal, and a wave-front demultiplexer configured to process fifth and sixth input signals into fifth and sixth output signals each carrying information associated with the fifth and sixth input signals. The fifth input signal carries information associated with the third output signal, and the sixth input signal carries information associated with the fourth output signal.
H04J 14/02 - Systèmes multiplex à division de longueur d'onde
H03F 1/02 - Modifications des amplificateurs pour augmenter leur rendement, p. ex. étages classe A à pente glissante, utilisation d'une oscillation auxiliaire
H03F 1/32 - Modifications des amplificateurs pour réduire la distorsion non linéaire
H03F 3/21 - Amplificateurs de puissance, p. ex. amplificateurs de classe B, amplificateur de classe C comportant uniquement des dispositifs à semi-conducteurs
H03F 3/24 - Amplificateurs de puissance, p. ex. amplificateurs de classe B, amplificateur de classe C d'étages transmetteurs de sortie
H03F 3/68 - Combinaisons d'amplificateurs, p. ex. amplificateurs à plusieurs voies pour stéréophonie
H03F 3/72 - Amplificateurs commandés, c.-à-d. amplificateurs mis en service ou hors service au moyen d'un signal de commande
Presented is a multi-channel data process to utilize wavefront multiplexing for data storage and data stream transport with redundancy on cloud or in a distribution network. This processing features additional applications for multi-media recording and data communications via transponding platforms including satellites, unmanned air vehicles (UAVs), or others for better survivability and faster accessing. Multiple concurrent data streams are pre-processed by a wavefront multiplexer into multiple sub-channels or wavefront components, where signals from respective data streams are replicated into sub-channels. These replicated data streams are linked via a unique complex weighting vector (amplitude and phase or their equivalents), or “wave-front”, which are also linked by various spatially independent wavefronts. Additionally, probing data streams are embedded and linked via some of the independent wavefronts. Aggregated data streams in sub-channels are unique linear combinations of all input data streams. Generating redundancy for stored or transported data are options in the WF muxing process. Post-processing via a wavefront de-multiplexer converts various sub-channel data streams back to the original data streams, utilizing the embedded known priori data streams as additional knowledge for reducing degrees of freedom to restore orthogonality or independency among multiple wavefronts.
A novel noise injection technique is presented to improve dynamic range with low resolution and low speed analog to digital converters. This technique combines incoming signal and noise signal with wave front de-multiplexer and split into several channels. Then low resolution and low speed analog to digital converters are used to sample each channels. All signals are recovered using wave front multiplexer. For advanced design, ground diagnostic signals with optimizing processor can be added to guarantee recovery quality.
Multiple data sets are preprocessed by WF muxing before stored/transported. WF muxed data is aggregated data from multiple data sets. The original data is reassembled via WF demuxing after retrieving a lesser but scalable number of WF muxed data sets. A customized set of WF muxing on multiple digital files as inputs including at least a data message file and a selected digital envelop file, is configured to guarantee at least one of the multiple outputs comprising a weighted sum of all inputs with an appearance to human natural sensors substantially identical to the appearance of the selected digital envelop in a same image, video or audio format. The output file is the file with enveloped or embedded messages. The embedded message may be reconstituted by a corresponding WF demuxing processor at destination with the known a priori information of the original digital envelope.
Data files with digital envelops may be used for many new applications for cloud computing. The new applications include games and entertainments such as digital fortune cookies, and treasure hunting, unique techniques for digital right management, or even additional privacy and survivability on data storage and transport on cloud computing. Wavefront multiplexing/demultiplexing process (WF muxing/demuxing) embodying an architecture that utilizes multi-dimensional waveforms has found applications in data storage and transport on cloud. Multiple data sets are preprocessed by WF muxing before stored/transported. WF muxed data is aggregated data from multiple data sets that have been “customized processed” and disassembled into any scalable number of sets of processed data, with each set being stored on a storage site. The original data is reassembled via WF demuxing after retrieving a lesser but scalable number of WF muxed data sets. A customized set of WF muxing on multiple digital files as inputs including at least a data message file and a selected digital envelop file, is configured to guarantee at least one of the multiple outputs comprising a weighted sum of all inputs with an appearance to human natural sensors substantially identical to the appearance of the selected digital envelop in a same image, video or audio format. Enveloping processing is a subset of WF muxing processing. The output file is the file with enveloped or embedded messages. The embedded message may be reconstituted by a corresponding WF demuxing processor at destination with the known a priori information of the original digital envelope. In short, digital enveloping/de-enveloping can be implemented via WF muxing and demuxing formulations. WF muxed data featured enhanced privacy and redundancy in data transport and storage on cloud. On the other hand, data enveloping is an application in an opposite direction for conventional WF muxing applications as far as redundancy is concerned. Enveloped data are intended only for limited receivers who has access to associated digital envelope data files with enhanced privacy for no or minimized redundancy.
A satellite broadcasting system is achieved where remote beam forming processors combined with wavefront multiplexers located among distributed ground stations are used to control downlink beam footprints and pointing directions. Digital beam forming (DBF) techniques allow a single satellite download broadcast antenna array to generate multiple independently pointed simultaneous downlinks, which may contain distinct information content. Allocation of some uplink back-channel elements as diagnostic signals allows for continuous calibration of uplink channels, improving downlink broadcast array and user broadcast performance. Wavefront multiplexing/demultiplexing allows all array element signals to be radiated by the broadcasting antenna array, with simultaneous propagation from ground stations to the broadcasting satellites through available parallel propagation channels in the uplinks of feeder links, with equalized amplitude and phase differentials. Further, additional wavefront multiplexing/demultiplexing pairs are further used to coherently broadcast signals from a remote beam forming facility on ground to cover areas through multiple broadcasting satellites.
H04L 12/28 - Réseaux de données à commutation caractérisés par la configuration des liaisons, p. ex. réseaux locaux [LAN Local Area Networks] ou réseaux étendus [WAN Wide Area Networks]
H04L 27/26 - Systèmes utilisant des codes à fréquences multiples
A receive only smart antenna with a command pointing option for communicating with geostationary satellites that autonomously detects the directions from which desired signal are received, and steer the multiple beams accordingly. An array feed is used to illuminate a parabolic reflector. Each feed element of the receive only smart antenna is associated with a unique beam pointing direction. As a receiver is switched to different feed elements, the far-field beam is scanned, making it possible to track a geostationary satellite in a slightly inclined orbit. This eliminates the need for mechanical tracking and maintains high antenna gain in the direction of the geostationary satellite. The receive only smart antenna also features capabilities to form multiple simultaneous beams supporting operations of multiple geo-satellites in closely spaced slightly inclined orbits. The designs can support orthogonal beams for enhanced bandwidth capacity via multiple beams with excellent spatial isolation.
H01Q 3/02 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne utilisant un mouvement mécanique de l'ensemble d'antenne ou du système d'antenne
H04B 7/08 - Systèmes de diversitéSystèmes à plusieurs antennes, c.-à-d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station de réception
H01Q 3/26 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la phase relative ou l’amplitude relative et l’énergie d’excitation entre plusieurs éléments rayonnants actifsDispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la distribution de l’énergie à travers une ouverture rayonnante
H01Q 3/46 - Lentilles actives ou réseaux réfléchissants
H01Q 3/24 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier l'orientation, par commutation de l'énergie fournie, d'un élément actif rayonnant à un autre, p. ex. pour commutation du lobe
H04B 7/06 - Systèmes de diversitéSystèmes à plusieurs antennes, c.-à-d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station d'émission
61.
Concurrent airborne communication methods and systems
Aircrafts or unmanned air vehicles flying near Earth are used as airborne communications towers or relays. Using techniques of ground based beam forming and wavefront multiplexing enhance the ability to coherently combine the power of the communication signals, and improve the signal-to-noise ratio.
A communication system includes a transmitter segment at a source location inputting a plurality of input signals to be transmitted. The input signals are transformed to wavefront multiplexed signals (WFM signals), and the WFM signals are modulated into WFM waveforms. The WFM waveforms are transmitted through a segment of propagation to a receiver segment; wherein the segment of propagation includes a plurality of UAV based transmission channels among the WFM waveforms; wherein the WFM waveforms are transmitted over the transmission channels; wherein the receiver segment receives the WFM waveforms from the transmission channels. Demodulation is performed on the received WFM waveforms to convert the received WFM waveforms to received WFM signals individually. A wavefront de-multiplexing transform is performed on the received WFM signals to recover individual desired signals.
Aircrafts flying near Earth or naval vessels are used as active scattering platforms in a multipath communications channel in MIMO communications systems. These man-made platforms in a communications channel, with techniques of beam forming and wavefront multiplexing in both transmitters at source and receivers at destinations enhance the ability to coherently combine the power of the communication signals, and improve the signal-to-noise ratio in addition to the MIMO advantage of multiple times of channel capacity over a finite bandwidth via frequency reuse. These platforms may be stationary, mobile ground based, or ocean surface based. They may also be airborne, or space borne. A swarm of 10's micro-UAV based mini-transponders is an example through active scattering of these micro-UAV to generate 10× more available bandwidth between a base station and ground mobile users over same bandwidth.
H04B 7/06 - Systèmes de diversitéSystèmes à plusieurs antennes, c.-à-d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station d'émission
H04L 5/00 - Dispositions destinées à permettre l'usage multiple de la voie de transmission
Signals of data streams for transmission to user equipment (UE) in spoke-and-hub configurations will utilize multiple transponders of satellites. Radiation patterns from ground terminals with distributed apertures feature orthogonal beams (OB). A tracking OB beam from a moving platform dynamically shall autonomously be formed as a shaped beam by a digital-beam-forming (DBF) network with a peak to a desired satellite, and nulls to undesired satellites to minimize mutual interferences among multiple satellite spatially. Ground hubs and mobile terminals feature “coherent” bandwidth aggregating capability from multiple available but non-contiguous slices of frequency slots in many transponders by wavefront multiplexing/demultiplexing (WF muxing/demuxing) techniques. These individual frequency slots must be dynamically selected, calibrated and equalized continuously in receivers via embedded probing signals as a part of WF muxing/demuxing techniques.
Security on data storage and transport are important concerns on cloud computing. Wavefront multiplexing/demultiplexing process (WF muxing/demuxing) embodying an architecture that utilizes multi-dimensional waveforms has found applications in data storage and transport on cloud. Multiple data sets are preprocessed by WF muxing before stored/transported. WF muxed data is aggregated data from multiple data sets that have been “customized processed” and disassembled into any scalable number of sets of processed data, with each set being stored on a storage site. The original data is reassembled via WF demuxing after retrieving a lesser but scalable number of WF muxed data sets. In short, the WF muxed data storage solution enhances data security and data redundancy by, respectively, creating a new dimension to existing security/privacy methods and significantly reducing the storage space needed for data redundancy. In addition, WF muxing/demuxing methods enable a monitoring capability on the integrity of stored data.
G06F 17/30 - Recherche documentaire; Structures de bases de données à cet effet
G06F 11/10 - Détection ou correction d'erreur par introduction de redondance dans la représentation des données, p. ex. en utilisant des codes de contrôle en ajoutant des chiffres binaires ou des symboles particuliers aux données exprimées suivant un code, p. ex. contrôle de parité, exclusion des 9 ou des 11
H04L 29/08 - Procédure de commande de la transmission, p.ex. procédure de commande du niveau de la liaison
G06F 11/20 - Détection ou correction d'erreur dans une donnée par redondance dans le matériel en utilisant un masquage actif du défaut, p. ex. en déconnectant les éléments défaillants ou en insérant des éléments de rechange
66.
Flexible multi-channel amplifiers via wavefront muxing techniques
This invention aims to present a smart and dynamic power amplifier module that features both power combining and power sharing capabilities. The proposed flexible power amplifier (PA) module consists of a pre-processor, N PAs, and a post-processor. The pre-processor is an M-to-N wavefront (WF) multiplexer (muxer), while the post processor is a N-to-M WF de-multiplexer (demuxer), where N≧M≧2. Multiple independent signals can be concurrently amplified by a proposed multi-channel PA module with a fixed total power output, while individual signal channel outputs feature different power intensities with no signal couplings among the individual signals. In addition to basic configurations, some modules can be configured to feature both functions of parallel power amplifiers and also as M-to-M switches. Other programmable features include configurations of power combining and power redistribution functions with a prescribed amplitude and phase distributions, as well as high power PA with a linearizer.
H03F 1/02 - Modifications des amplificateurs pour augmenter leur rendement, p. ex. étages classe A à pente glissante, utilisation d'une oscillation auxiliaire
H03F 1/32 - Modifications des amplificateurs pour réduire la distorsion non linéaire
H03F 3/21 - Amplificateurs de puissance, p. ex. amplificateurs de classe B, amplificateur de classe C comportant uniquement des dispositifs à semi-conducteurs
H03F 3/24 - Amplificateurs de puissance, p. ex. amplificateurs de classe B, amplificateur de classe C d'étages transmetteurs de sortie
H03F 3/68 - Combinaisons d'amplificateurs, p. ex. amplificateurs à plusieurs voies pour stéréophonie
H03F 3/72 - Amplificateurs commandés, c.-à-d. amplificateurs mis en service ou hors service au moyen d'un signal de commande
67.
Accessing LP transponders with CP terminals via wavefront multiplexing techniques
The invention is about a method and apparatus for grouping multiple satellite transponders with both (LP) polarization formats in different frequencies through Wave-Front (WF) Multiplexing (muxing) techniques for ground terminals with incompatible (CP) polarization formats. As a result of this invention, linear polarized (LP) transponders can be accessed and efficiently utilized by circularly polarized (CP) ground terminals and vice versa. This invention consists of conventional ground terminals, a unique organization of space assets, and a unique polarization alignment processor. The applications of wavefront multiplexing techniques to satellite communications offer many potential advantages, including improved flexibility and utility efficiency of existing space assets. Our proposed “Polarization Utility Waveforms” is an entirely new concept in VSAT and Earth Station Antenna diversity. The implementation enables antennas to switch between different polarization formats at the press of a button, and provides teleport operators with greater flexibility in how they manage their assets.
H01Q 3/24 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier l'orientation, par commutation de l'énergie fournie, d'un élément actif rayonnant à un autre, p. ex. pour commutation du lobe
H01Q 21/24 - Combinaisons d'unités d'antennes polarisées dans des directions différentes pour émettre ou recevoir des ondes polarisées circulairement ou elliptiquement ou des ondes polarisées linéairement dans n'importe quelle direction
A receive-only smart antenna with a directional-point command capability for communication with geostationary satellites, allowing autonomous detection of received signals in order to allow steerage of multiple beams. An array feed is used to illuminate a parabolic reflector, with each feed element of the smart antenna associated with a unique beam-pointing direction. As the receiver switches to different feed elements, the far-field beam is scanned, making it possible to track a geostationary satellite in slightly inclined orbits, eliminating the need for mechanical tracking mechanisms while maintaining high antenna gain in the direction of the satellite. The receive-only smart antenna also features capabilities for forming multiple simultaneous beams supporting operations of multiple geo-satellites closely space in slightly inclined orbits. The designs can support orthogonal beams for enhanced bandwidth capacity via multiple beams with excellent spatial isolation. In addition, the use of toroidal reflectors with multiple linear array feeds spaced in the azimuth direction enables multi-beam operation, allowing multiple geostationary satellites spaced up to ±15 beam-widths of the terminal in azimuth, to be tracked simultaneously and independently.
H01Q 3/02 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne utilisant un mouvement mécanique de l'ensemble d'antenne ou du système d'antenne
H04B 7/08 - Systèmes de diversitéSystèmes à plusieurs antennes, c.-à-d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station de réception
H01Q 3/26 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la phase relative ou l’amplitude relative et l’énergie d’excitation entre plusieurs éléments rayonnants actifsDispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la distribution de l’énergie à travers une ouverture rayonnante
H01Q 3/46 - Lentilles actives ou réseaux réfléchissants
H01Q 3/24 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier l'orientation, par commutation de l'énergie fournie, d'un élément actif rayonnant à un autre, p. ex. pour commutation du lobe
H04B 7/06 - Systèmes de diversitéSystèmes à plusieurs antennes, c.-à-d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station d'émission
69.
Resource allocation in PON networks via wave-front multiplexing and de-multiplexing
A data communication system comprises a wave-front multiplexer configured to wave-front multiplex first electronic signals into second electronic signals. An electronic-to-optical converter is configured to convert a third electronic signal carrying information associated with the second electronic signals into a first optical signal. An optical transferring module is configured to split the first optical signal into second optical signals, wherein each of the second optical signals carries the same data as the first optical signal carries. Optical-to-electronic converters are configured to convert the second optical signals into fourth electronic signals. Wave-front demultiplexers each are configured to wave-front demultiplex the fourth electronic signals into fifth electronic signals equivalent to the first electronic signals respectively.
Aircrafts or unmanned air vehicles flying near Earth are used as airborne communications towers or relays. Using techniques of ground based beam forming and wavefront multiplexing enhance the ability to coherently combine the power of the communication signals, and improve the signal-to-noise ratio.
An advanced multiple-beam GPS receiving system is achieved that is capable of simultaneously tracking multiple GPS satellites independently, detecting multiple interference signals individually, and suppressing directional gain in the antenna pattern of each beam in the interference directions. The GPS receiving system can be used for both planar and non-planar receiving arrays, including arrays that are conformally applied to the surface of a platform such as an aircraft. The GPS receiver combines spatial filtering and acquisition code correlation for enhanced rejection of interfering sources. Enhanced gain in the direction of GPS satellites and the ability to shape the beam patterns to suppress gain in the direction of interfering sources make the GPS receiving system largely insensitive to interfering and jamming signals that plague conventional GPS receivers.
H01Q 3/00 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne
G01S 19/35 - Détails de construction ou détails de matériel ou de logiciel de la chaîne de traitement des signaux
G01S 19/36 - Détails de construction ou détails de matériel ou de logiciel de la chaîne de traitement des signaux concernant l'étage d'entrée du récepteur
H01Q 3/26 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la phase relative ou l’amplitude relative et l’énergie d’excitation entre plusieurs éléments rayonnants actifsDispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la distribution de l’énergie à travers une ouverture rayonnante
H01Q 25/00 - Antennes ou systèmes d'antennes fournissant au moins deux diagrammes de rayonnement
H01Q 1/28 - Adaptation pour l'utilisation dans ou sur les avions, les missiles, les satellites ou les ballons
72.
Method and apparatus for channel bonding using multiple-beam antennas
A system is provided that enhances the throughput and reliability of wireless communications by providing multi-beam user terminals that exhibit directional discrimination. Multiple wireless communication channels are matched with multiple beams created from an array antenna by a beam-forming processor. The multiple wireless communication channels are bonded into a single virtual channel, thereby increasing data bandwidth while reducing interference and multi-path effects that can degrade communications. The beam-forming function may be performed in a dedicated beam-forming processor or may reside within a general-purpose microprocessor located in the user terminal. In addition, a wireless communications system with access points featuring multiple beams that exhibit directional discrimination that can concurrently support multiple users with multi-beam terminals via a common frequency channel. Both forward and return links feature multiple-folded frequency reuse, enabling multiple users with higher throughput and improved reliability. The spectrum utility of the communications system has been enhanced with multiple folds.
H04B 7/10 - Diversité de polarisationDiversité de direction
H01Q 25/00 - Antennes ou systèmes d'antennes fournissant au moins deux diagrammes de rayonnement
H01Q 1/22 - SupportsMoyens de montage par association structurale avec d'autres équipements ou objets
H01Q 1/00 - Détails de dispositifs associés aux antennes
H01Q 3/26 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la phase relative ou l’amplitude relative et l’énergie d’excitation entre plusieurs éléments rayonnants actifsDispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la distribution de l’énergie à travers une ouverture rayonnante
This invention aims to present a smart and dynamic power amplifier module that features both power combining and power sharing capabilities. The proposed flexible power amplifier (PA) module consists of a pre-processor, N PAs, and a post-processor. The pre-processor is an M-to-N wavefront (WF) multiplexer (muxer), while the post processor is a N-to-M WF de-multiplexer (demuxer), where N≧M≧2. Multiple independent signals can be concurrently amplified by a proposed multi-channel PA module with a fixed total power output, while individual signal channel outputs feature different power intensities with no signal couplings among the individual signals. In addition to basic configurations, some modules can be configured to feature both functions of parallel power amplifiers and also as M-to-M switches. Other programmable features include configurations of power combining and power redistribution functions with a prescribed amplitude and phase distributions, as well as high power PA with a linearizer.
A communication system and method that allows a transmitter segment (ground end of uplink segment) to dynamically combine power from a plurality of propagation channels (transponders) to improve power levels of signals being transmitted, without affecting the receiver segment (user end of downlink segment) and the propagation segment (space segment), and without modifying propagation apparatus configurations (satellite). Specifically, the transmitter segment generates mixtures of input signals by using Wavefront-Multiplexing and transmits wavefront-multiplexed (WFM) signals through propagation channels to a receiver segment that coherently separates the mixtures of received WFM signals by using adaptive equalization and Wavefront-De-Multiplexing. The WFM signal mixtures allow an operator, or automated system, at the transmitter segment to dynamically allocate equivalent channel (transponder) powers according to continuously changing market demands by dynamically including change of relative input powers into ratios of the WFM signal mixtures being transmitted.
An advanced digital beam forming technique is achieved that is capable of simultaneously forming multiple beams and attenuating the cross-pol component at multiple locations. The proposed invention, comprising a series of signal inputs, optimization loops and weighting processes, successfully eliminates the side effect of an increase of the cross-pol in the process of beam-forming, thus reducing potential interference. This technique utilizes the orthogonally polarized signal component which is already available and can minimize both the horizontally polarized and vertically polarized cross-pol at the same time. The complexity of computation can be reduced by using only part of the orthogonal polarized components in the optimization.
A receive only smart antenna with a command pointing option for communicating with geostationary satellites that autonomously detects the directions from which desired signal are received, and steer the multiple beams accordingly. An array feed is used to illuminate a parabolic reflector. Each feed element of the receive only smart antenna is associated with a unique beam pointing direction. As a receiver is switched to different feed elements, the far-field beam is scanned, making it possible to track a geostationary satellite in a slightly inclined orbit. This eliminates the need for mechanical tracking and maintains high antenna gain in the direction of the geostationary satellite. The receive only smart antenna also features capabilities to form multiple simultaneous beams supporting operations of multiple geo-satellites in closely spaced slightly inclined orbits. The designs can support orthogonal beams for enhanced bandwidth capacity via multiple beams with excellent spatial isolation.
H01Q 3/00 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne
77.
Polarization diversity with portable devices via wavefront muxing techniques
A novel terrestrial wireless communications technique for terrestrial portable terminals including hand-held mobile devices and fixed wireless instruments, utilizing a spoke-and-hub communications system, having a plurality of individual hubs and/or base-stations all in communications with the portable terminals. The portable terminals and the hubs are assigned to use incompatible polarity formats in terms of circularly polarity (CP) and linearly polarity (LP). In forward links, a signal processed by the LP ground telecommunications hubs is radiated through multiple antennas with various LP polarities to an individual CP user simultaneously. The multiple paths are organized via assignments of a plurality of polarities, frequency slots, and directions by wavefront multiplexing/demultiplexing techniques such that the same communications assets including frequency spectrum may be re-used by other users. The same polarity diversity methods can be extended to peer-to-peer communications.
The present invention features novel methods of implementing configurable arrays for personal portable devices including hand-held mobile devices and re-locatable wireless devices, utilizing a wireless communications system that employs multiple individual hubs and/or base-stations. The digital beam forming (DBF) methodology utilizes multiple low gain elements conformal to the mechanical contours of handheld devices to function as arrays. The distributed N element arrays dynamically provide the options of reconfigurable shaped beams with near hemispheric radiation patterns for various handheld orientations and conditions by various users, while also supporting operations of multiple orthogonal beams concurrently connecting to multiple hubs. The larger the N becomes, the more flexibility the residing devices can provide.
H04B 7/08 - Systèmes de diversitéSystèmes à plusieurs antennes, c.-à-d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station de réception
H01Q 1/24 - SupportsMoyens de montage par association structurale avec d'autres équipements ou objets avec appareil récepteur
H01Q 3/24 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier l'orientation, par commutation de l'énergie fournie, d'un élément actif rayonnant à un autre, p. ex. pour commutation du lobe
H01Q 3/26 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la phase relative ou l’amplitude relative et l’énergie d’excitation entre plusieurs éléments rayonnants actifsDispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la distribution de l’énergie à travers une ouverture rayonnante
H01Q 21/20 - Réseaux d'unités d'antennes, de même polarisation, excitées individuellement et espacées entre elles les unités étant espacées le long d'un trajet curviligne ou adjacent à celui-ci
A receiver with orthogonal beam forming technique is achieved that is capable of differentiating different signal components within the received composite signal. An adaptive processor is used to eliminate the signal component whose phase information is known or can be calculated. The phase information of the major component of a signal can be easily acquired by using a limiter. The phase information of other signal components can be acquired by their direction information and other characteristics, such as modulation scheme, etc. Multiple orthogonal beams can be formed by eliminating one unwanted signal component each time by the adaptive processor until all unwanted signal is eliminated. Thus, a composite signal from multiple sources can be broken down into their component signals.
A novel noise injection technique is presented to improve dynamic range with low resolution and low speed analog to digital converters. This technique combines incoming signal and noise signal with wave front de-multiplexer and split into several channels. Then low resolution and low speed analog to digital converters are used to sample each channels. All signals are recovered using wave front multiplexer. For advanced design, ground diagnostic signals with optimizing processor can be added to guarantee recovery quality.
A novel wide null forming system achieves both wide bandwidth and beam width null through employing an antenna array to receive and transmit signals to which a complex null weight vector, calculated by perturbation program, is applied. The novel wide null forming system includes a multiple-element antenna array for receiving or transmitting signals. Multiple conditioning units matching the number of elements is present to condition the signals for proper reception and analysis, after which a series of complex multiplier processors adds complex weights. After being weighted each constituent beam is combined in an adding processor to form one composite beam for use by the user.
G01S 3/16 - Systèmes pour déterminer une direction ou une déviation par rapport à une direction prédéterminée utilisant une comparaison d'amplitude de signaux provenant successivement d'antennes ou de systèmes d'antennes réceptrices ayant des caractéristiques de directivité différemment orientées ou d'un système d'antenne ayant une caractéristique de directivité à orientation variant périodiquement
H01Q 3/00 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne
82.
Satellite ground terminal incorporating a smart antenna that rejects interference
This device combines multiple elements that function like a single smart antenna that performs both connectivity and spatial discrimination functions. The antenna functions in both receive and transmit modes. The apparatus utilizes commonly used components to distinguish and separate desired satellite signals from those signals of satellites in close directional proximity. Disclosed are six methods for optimizing simultaneously reception of multiple desired satellite signals performed either mechanically or electronically and also included is an optimization technique. The transmission apparatus uses many of the same components as the receiver antenna and additionally uses in-beam nulling to fine tune transmission.
H01Q 3/26 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la phase relative ou l’amplitude relative et l’énergie d’excitation entre plusieurs éléments rayonnants actifsDispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la distribution de l’énergie à travers une ouverture rayonnante
H01Q 19/12 - Combinaisons d'éléments actifs primaires d'antennes avec des dispositifs secondaires, p. ex. avec des dispositifs quasi optiques, pour donner à une antenne une caractéristique directionnelle désirée utilisant des surfaces réfléchissantes où les surfaces sont concaves
H01Q 21/29 - Combinaisons d'unités d'antennes de types différents interagissant entre elles pour donner une caractéristique directionnelle désirée
83.
Apparatus and method of generating quiet zone by cancellation-through-injection techniques
A quiet zone generation technique is proposed for interference mitigation for a receive antenna by injecting the very interference signals via iterative processing, generating quiet zones dynamically for receive (RCV) antennas. The receive antenna may feature multiple receiving apertures distributed over a finite area. Optimization loops consist of four cascaded functional blocks; (1) a pick-up array to obtain the interference signals, (2) element weighting and/or repositioning processors, (3) an auxiliary transmit (XMIT) array with optimized element positions, (4) a diagnostic network with strategically located probes, and (5) an optimization processor with cost minimization algorithms. To minimize interferences between transmit (Tx) and receiving (Rx) apertures in limited space of an antenna farm for communications and/or radar applications are very tough problems. However, solutions for co-site interference mitigation may not be generic ones but more specific to geometries of antenna farms, Tx apertures and Rx antenna locations, and beam positions of the Tx beams.
H04K 3/00 - Brouillage de la communicationContre-mesures
G10K 11/178 - Procédés ou dispositifs de protection contre le bruit ou les autres ondes acoustiques ou pour amortir ceux-ci, en général utilisant des effets d'interférenceMasquage du son par régénération électro-acoustique en opposition de phase des ondes acoustiques originales
84.
Generating acoustic quiet zone by noise injection techniques
A quiet zone generation technique for acoustic/audio signals is proposed for mitigation of selected noise or interferences over limited areas in free space by injecting the very acoustic noise, interference, or audio feedback signals via iterative processing, generating quiet zones dynamically. This creates undesired noise-free quiet zones. Optimization loops operating iteratively to electronically process cancellation signals consist of three interconnected functional blocks: (1) an acoustic injection array, consisting of pick-up arrays to obtain the interference signals, beam forming networks for element weighting and/or re-positioning, and array elements for noise injections, (2) a diagnostic network with strategically located probes, and (3) an optimization processor with cost minimization algorithms to calculate element weights for updating.
G10K 11/34 - Procédés ou dispositifs pour transmettre, conduire ou diriger le son pour focaliser ou pour diriger le son, p. ex. balayage par commande électrique de systèmes de transducteurs, p. ex. en dirigeant un faisceau acoustique
G10K 11/178 - Procédés ou dispositifs de protection contre le bruit ou les autres ondes acoustiques ou pour amortir ceux-ci, en général utilisant des effets d'interférenceMasquage du son par régénération électro-acoustique en opposition de phase des ondes acoustiques originales
85.
Apparatus and method for remote beam forming for DBS satellites
A satellite broadcasting system is achieved where remote beam forming processors combined with wavefront multiplexers located among distributed ground stations are used to control downlink beam footprints and pointing directions. Digital beam forming (DBF) techniques allow a single satellite download broadcast antenna array to generate multiple independently pointed simultaneous downlinks, which may contain distinct information content. Allocation of some uplink back-channel elements as diagnostic signals allows for continuous calibration of uplink channels, improving downlink broadcast array and user broadcast performance. Wavefront multiplexing/demultiplexing allows all array element signals to be radiated by the broadcasting antenna array, with simultaneous propagation from ground stations to the broadcasting satellites through available parallel propagation channels in the uplinks of feeder links, with equalized amplitude and phase differentials. Further, additional wavefront multiplexing/demultiplexing pairs are further used to coherently broadcast signals from a remote beam forming facility on ground to cover areas through multiple broadcasting satellites.
H04L 12/28 - Réseaux de données à commutation caractérisés par la configuration des liaisons, p. ex. réseaux locaux [LAN Local Area Networks] ou réseaux étendus [WAN Wide Area Networks]
H04N 7/20 - Adaptations pour la transmission sur une bande de fréquence du domaine des GHz, p. ex. par satellite
The invention is about a method and apparatus for grouping multiple satellite transponders with both (LP) polarization formats in different frequencies through Wave-Front (WF) Multiplexing (muxing) techniques for ground terminals with incompatible (CP) polarization formats. As a result of this invention, linear polarized (LP) transponders can be accessed and efficiently utilized by circularly polarized (CP) ground terminals and vice versa. This invention consists of conventional ground terminals, a unique organization of space assets, and a unique polarization alignment processor. The applications of wavefront multiplexing techniques to satellite communications offer many potential advantages, including improved flexibility and utility efficiency of existing space assets. Our proposed “Polarization Utility Waveforms” is an entirely new concept in VSAT and Earth Station Antenna diversity. The implementation enables antennas to switch between different polarization formats at the press of a button, and provides tele-port operators with greater flexibility in how they manage their assets.
A system for allowing ground terminals, mobile or stationary, to dynamically and electronically re-align signal polarizations to match that of incoming signal polarizations from transmitting sources. An adaptive re-orientation technique utilizes a cost minimization function to determine the difference between actual orientation values and desired orientation values. Calculations of satellite and ground terminal orientations and bearings to create weighting components allow a mobile ground terminal to electronically realign itself to the signals of a transmitting source, thereby eliminating the need for physically re-orienting the antenna array through mechanical processes.
An advanced multiple-beam GPS receiving system is achieved that is capable of simultaneously tracking multiple GPS satellites independently, detecting multiple interference signals individually, and suppressing directional gain in the antenna pattern of each beam in the interference directions. The GPS receiving system can be used for both planar and non-planar receiving arrays, including arrays that are conformally applied to the surface of a platform such as an aircraft. The GPS receiver combines spatial filtering and acquisition code correlation for enhanced rejection of interfering sources. Enhanced gain in the direction of GPS satellites and the ability to shape the beam patterns to suppress gain in the direction of interfering sources make the GPS receiving system largely insensitive to interfering and jamming signals that plague conventional GPS receivers.
H01Q 3/00 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne
89.
Architectures and methods for novel antenna radiation optimization via feed repositioning
An antenna system comprises: multiple antenna elements; and multiple beam forming networks configured to produce radiation patterns for both receiving and transmission functions configured to be optimized by re-positioning said antenna elements, wherein said beam forming networks comprise a receiving beam forming network configured to combine multiple first inputs from said antenna elements into at least a first output, and a transmission beam forming network configured to divide a second input into multiple second outputs to said antenna elements.
H01Q 1/08 - Moyens pour replier tout ou partie des antennes
H01Q 19/10 - Combinaisons d'éléments actifs primaires d'antennes avec des dispositifs secondaires, p. ex. avec des dispositifs quasi optiques, pour donner à une antenne une caractéristique directionnelle désirée utilisant des surfaces réfléchissantes
H01Q 3/04 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne utilisant un mouvement mécanique de l'ensemble d'antenne ou du système d'antenne pour faire varier une coordonnée de l'orientation
H01Q 3/06 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne utilisant un mouvement mécanique de l'ensemble d'antenne ou du système d'antenne pour faire varier une coordonnée de l'orientation dans un angle limité
H01Q 19/13 - Combinaisons d'éléments actifs primaires d'antennes avec des dispositifs secondaires, p. ex. avec des dispositifs quasi optiques, pour donner à une antenne une caractéristique directionnelle désirée utilisant des surfaces réfléchissantes où les surfaces sont concaves la source rayonnante primaire étant un élément rayonnant unique, p. ex. un dipôle, une fente, une terminaison de guide d'onde
90.
A DIGITAL BEAM-FORMING APPARATUS AND TECHNIQUE FOR A MULTI-BEAM GLOBAL POSITIONING SYSTEM (GPS) RECEIVER
An advanced multiple-beam GPS receiving system is achieved that is capable of simultaneously tracking multiple GPS satellites independently, detecting multiple interference signals individually, and suppressing directional gain in the antenna pattern of each beam in the interference directions. The GPS receiving system can be used for both planar and non-planar receiving arrays, including arrays that are conformally applied to the surface of a platform such as an aircraft. The GPS receiver combines spatial filtering and acquisition code correlation for enhanced rejection of interfering sources. Enhanced gain in the direction of GPS satellites and the ability to shape the beam patterns to suppress gain in the direction of interfering sources make the GPS receiving system largely insensitive to interfering and jamming signals that plague conventional GPS receivers.
G01S 1/00 - Radiophares ou systèmes de balisage émettant des signaux ayant une ou des caractéristiques pouvant être détectées par des récepteurs non directionnels et définissant des directions, situations ou lignes de position déterminées par rapport aux émetteurs de radiophareRécepteurs travaillant avec ces systèmes
91.
APPARATUS AND METHOD FOR RADAR IMAGING BY MEASURING SPATIAL FREQUENCY COMPONENTS
A radar imaging system is provided that directly measures the spatial frequency components of a scene via digital-beam-forming techniques applied along the cross-track dimension. Separate transmit and receive antennas provide increased integration time for the receive function, thus improving the signal-to-noise ratio. A segmented receive antenna is employed and processed as a series of interferometers sensitive to spatial frequency components of the scene corresponding to the separation between pairs of antenna elements. Range gating is used in the along-track dimension to divide the return from an illuminated swath into multiple range bins that may be processed independently. The system provides an improved signal-to-noise ratio and lends significant flexibility to the image formation process, improving the quality of the radar imaging. An embodiment having multiple transmit antennas is also provided that enables the generation of three-dimensional stereoscopic radar images.
G01S 13/00 - Systèmes utilisant la réflexion ou la reradiation d'ondes radio, p. ex. systèmes radarSystèmes analogues utilisant la réflexion ou la reradiation d'ondes dont la nature ou la longueur d'onde sont sans importance ou non spécifiées
92.
Digital beam-forming apparatus and technique for a multi-beam global positioning system (GPS) receiver
An advanced multiple-beam GPS receiving system is achieved that is capable of simultaneously tracking multiple GPS satellites independently, detecting multiple interference signals individually, and suppressing directional gain in the antenna pattern of each beam in the interference directions. The GPS receiving system can be used for both planar and non-planar receiving arrays, including arrays that are conformally applied to the surface of a platform such as an aircraft. The GPS receiver combines spatial filtering and acquisition code correlation for enhanced rejection of interfering sources. Enhanced gain in the direction of GPS satellites and the ability to shape the beam patterns to suppress gain in the direction of interfering sources make the GPS receiving system largely insensitive to interfering and jamming signals that plague conventional GPS receivers.
G01S 19/24 - Acquisition ou poursuite des signaux émis par le système
G01S 19/37 - Détails de matériel ou de logiciel de la chaîne de traitement des signaux
H01Q 3/36 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la phase relative ou l’amplitude relative et l’énergie d’excitation entre plusieurs éléments rayonnants actifsDispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la distribution de l’énergie à travers une ouverture rayonnante faisant varier la phase par des moyens électriques avec des déphaseurs variables
93.
METHOD AND APPARATUS FOR CHANNEL BONDING USING A MULTIPLE-BEAM ANTENNA
A system is provided that enhances the throughput and reliability of wireless communications by providing multi-beam user terminals that exhibit directional discrimination. Multiple wireless communication channels are matched with multiple beams created from an array antenna by a beam-forming processor. The multiple wireless communication channels are bonded into a single virtual channel, thereby increasing data bandwidth while reducing interference and multi-path effects that can degrade communications. The beam-forming function may be performed in a dedicated beam-forming processor or may reside within a general-purpose microprocessor located in the user terminal.
A retro-directive antenna for communicating with a geostationary satellite autonomously detects the direction from which a signal is received, and transmits a beam that points back along the same direction. An array feed is used to illuminate a parabolic reflector. Each feed element of the retro-directive antenna is associated with a unique pointing direction of the beam in the far field. As the transmit energy is switched to different feed elements, the far-field beam is scanned, making it possible to track a geostationary satellite in a slightly inclined orbit. This eliminates the need for mechanical tracking and maintains high antenna gain in the direction of the geostationary satellite. The use of a toroidal reflector with multiple linear array feeds spaced in the azimuth direction enables multi-beam operation, allowing multiple geostationary satellites, spaced by up to fifteen beam widths in azimuth, to be tracked simultaneously and independently.
A satellite broadcasting system is achieved in which remote beam forming processors located among distributed ground stations are used to control downlink beam footprints and pointing directions. Digital beam forming techniques allow a single satellite downlink broadcast antenna array to generate multiple simultaneous downlinks that can be pointed independently and that may contain distinct information content. By allocating some of the uplink back-channel elements as null channels, continuous calibration of the uplink channel can be performed, improving the performance of the downlink broadcast array and the quality of the broadcast for users. By wavefront multiplexing, all of the uplink channel elements propagate through the all of the available propagation channels simultaneously, eliminating the need for complex and costly individual array-element calibration equipment using on-board or ground-based references.
A system is provided that enhances the throughput and reliability of wireless communications by providing multi-beam user terminals that exhibit directional discrimination. Multiple wireless communication channels are matched with multiple beams created from an array antenna by a beam-forming processor. The multiple wireless communication channels are bonded into a single virtual channel, thereby increasing data bandwidth while reducing interference and multi-path effects that can degrade communications. The beam-forming function may be performed in a dedicated beam-forming processor or may reside within a general-purpose microprocessor located in the user terminal.
A retro-directive antenna for communicating with a geostationary satellite autonomously detects the direction from which a signal is received, and transmits a beam that points back along the same direction. An array feed is used to illuminate a parabolic reflector. Each feed element of the retro-directive antenna is associated with a unique pointing direction of the beam in the far field. As the transmit energy is switched to different feed elements, the far-field beam is scanned, making it possible to track a geostationary satellite in a slightly inclined orbit. This eliminates the need for mechanical tracking and maintains high antenna gain in the direction of the geostationary satellite. The use of a toroidal reflector with multiple linear array feeds spaced in the azimuth direction enables multi-beam operation, allowing multiple geostationary satellites, spaced by up to fifteen beam widths in azimuth, to be tracked simultaneously and independently.
H01Q 1/00 - Détails de dispositifs associés aux antennes
H01Q 3/00 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne
98.
APPARATUS AND METHOD FOR REMOTE BEAM FORMING FOR SATELLITE BROADCASTING SYSTEMS
A satellite broadcasting system is achieved in which remote beam forming processors located among distributed ground stations are used to control downlink beam footprints and pointing directions. Digital beam forming techniques allow a single satellite downlink broadcast antenna array to generate multiple simultaneous downlinks that can be pointed independently and that may contain distinct information content. By allocating some of the uplink back-channel elements as null channels, continuous calibration of the uplink channel can be performed, improving the performance of the downlink broadcast array and the quality of the broadcast for users. By wavefront multiplexing, all of the uplink channel elements propagate through the all of the available propagation channels simultaneously, eliminating the need for complex and costly individual array element calibration equipment using on-board or ground-based references.
brevets
