Goods & Services

Electronic systems, embedded software sold as a component thereof and downloadable software that perform digital signal processing, command and control, radio signal receipt, digitization, storage, processing, and analysis of radio signal data, signals intelligence, namely, locating the source of radio signals, intercepting and decoding radio signals, and geolocation Engineering design services for electronic hardware systems and software that perform digital signal processing, command and control, radio signal receipt, digitization, processing and analysis, signals intelligence and geolocation; RF system and antenna design; Engineering design data analysis; orbit analysis

Abstract

Systems and methods for detecting, localizing, and filtering signals such as radiofrequency signals using an array of antennas are disclosed. Input signals each containing a signal of interested are received, along with a reference signal sharing one or more characteristics of the signal-of-interest. Predetermined time delays and frequency shifts are applied to the input signals such that the signal-of-interest components of the signals are synchronized and to cancel any Doppler-shifting between the signal-of-interest components. A filtering process is employed to filter the shifted input signals and sum them such that a metric indicating the degree of difference between the reference signal and the summed filtered signals (such as the mean squared error, for example) is minimized.

IPC Classes  ?

• H04B 1/709 - Correlator structure
• H04B 1/7097 - Interference-related aspects
• H04B 1/10 - Means associated with receiver for limiting or suppressing noise or interference

Goods & Services

Electronic systems and software that perform digital signal processing, command and control, radio signal receipt, digitization, storage, processing, and analysis of radio signal data, signals intelligence namely, locating the source of radio signals, intercepting and decoding radio signals, and geolocation; RF amplifiers, radio systems and antennas; digital-to-analog and analog-to-digital converters; Field-programmable gate arrays (FPGAs); software defined radios Engineering design services for electronic hardware systems and software that perform digital signal processing, command and control, radio signal receipt, digitization, processing and analysis, signals intelligence and geolocation; RF system and antenna design; Engineering design data analysis; orbit analysis

Goods & Services

wideband software defined radio (SDR) system comprised primarily of computer hardware and software for use in receiving, digitizing, processing and transmitting radio signals in the fields of signals intercept, intelligence and analysis, excluding autosound; Software defined radio (SDR) software platform, namely, processing platform for use in receiving, digitizing, processing and transmitting radio signals in the fields of signals intercept, intelligence and analysis, excluding autosound

Abstract

The process validates measurement data that are consistent with the current orbit or allowable maneuvers for Earth-orbiting satellites. The validated data may be processed to detect both large and small maneuvers; large maneuvers that may have been rejected by standard data validation process and small maneuvers that may have been missed. Large maneuvers may present as “trends” in the residuals above the noise threshold from multiple sensors. Small maneuvers may present as a deviation from the expected orbit. The OD engine is suitably configured (as per normal operation) to enforce data reduction on any outliers (e.g. >3 sigma). The maneuver estimation routines employ an objective function for selection of maneuver estimates that combines a residual fit to the current orbit and maneuver, orbit consistency and a penalty for validated but unused data (data that is rejected by the OD engine). The combination of enforcing data reduction in the OD engine of validated data while penalizing that reduction biases the estimation routines to select maneuver estimates that fit all or substantially all of the validated data. The maneuver estimation routines also suitably use a center time & duration window to select the maneuver estimate and iterate the process as new measurement data is received to refine the maneuver estimate.

IPC Classes  ?

• B64G 3/00 - Observing or tracking cosmonautic vehicles
• G01C 21/24 - NavigationNavigational instruments not provided for in groups specially adapted for cosmonautical navigation
• B64G 1/24 - Guiding or controlling apparatus, e.g. for attitude control

Abstract

Systems and methods of correlating potential transmitters with received radio signals is provided. Image data is provided including paths traveled by potential transmitter. Potential transmitters are identified within the image data along with path segments traveled by potential transmitters. A first and second transmitter calculate certain parameters of received signals assuming that signals originated along the path segments. The calculated signal parameters are then compared to measured signal parameter to determine whether a transmitter is associated with a particular path.

IPC Classes  ?

• G01S 3/28 - Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived simultaneously from receiving antennas or antenna systems having differently-oriented directivity characteristics

Abstract

A method of geolocating a stationary transmitter observed by a fixed receiver device and at least two receiver devices, at least one of the receiver devices moving includes obtaining wavelength-scaled phase difference measurements between pairs of receiver devices, and obtaining a result lattice of possible locations of the transmitter, one location more probable than the remainder. A method of geolocating a moving transmitter observed by a plurality of fixed or nearly fixed receiver devices, and a moving receiver device, includes obtaining wavelength-scaled phase difference measurements from the plurality of fixed or nearly fixed receiver devices to obtain a shape of the transmitter trajectory, measuring the phase difference between the moving receiver device and at least one of the plurality of fixed or nearly fixed receiver devices to obtain a phase error residual, and moving an estimated starting point of the transmitter to obtain a best-fit residual.

IPC Classes  ?

• G01S 5/04 - Position of source determined by a plurality of spaced direction-finders

Abstract

Systems and methods for on-the-fly characterization of an arbitrary array of antenna elements are provided. An array of arbitrary antenna elements and a reference receiver is provided. A location for a target source of signals is provided or assumed. Cross ambiguity functions are computed between the signal received by the reference receiver and the signal received by each antenna element. The cross ambiguity functions are analyzed to determine the phase and amplitude response of the antenna array to signals originating from the location of the target source of signals.

IPC Classes  ?

• H04B 7/00 - Radio transmission systems, i.e. using radiation field

Abstract

A method of geolocating a stationary transmitter observed by a fixed receiver device and at least two receiver devices, at least one of the receiver devices moving includes obtaining wavelength-scaled phase difference measurements between pairs of receiver devices, and obtaining a result lattice of possible locations of the transmitter, one location more probable than the remainder. A method of geolocating a moving transmitter observed by a plurality of fixed or nearly fixed receiver devices, and a moving receiver device, includes obtaining wavelength-scaled phase difference measurements from the plurality of fixed or nearly fixed receiver devices to obtain a shape of the transmitter trajectory, measuring the phase difference between the moving receiver device and at least one of the plurality of fixed or nearly fixed receiver devices to obtain a phase error residual, and moving an estimated starting point of the transmitter to obtain a best-fit residual.

IPC Classes  ?

• G01S 5/04 - Position of source determined by a plurality of spaced direction-finders
• G01S 1/18 - Elevational guidance systems, e.g. system for defining aircraft glide path

Abstract

Systems and methods of correlating potential transmitters with received radio signals is provided. Image data is provided including paths traveled by potential transmitter. Potential transmitters are identified within the image data along with path segments traveled by potential transmitters. A first and second transmitter calculate certain parameters of received signals assuming that signals originated along the path segments. The calculated signal parameters are then compared to measured signal parameter to determine whether a transmitter is associated with a particular path.

IPC Classes  ?

• G01S 3/16 - Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived sequentially from receiving antennas or antenna systems having differently-oriented directivity characteristics or from an antenna system having periodically-varied orientation of directivity characteristic
• G01S 3/28 - Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived simultaneously from receiving antennas or antenna systems having differently-oriented directivity characteristics

Abstract

An antennal arrangement for radio signals includes two loop antennas. Each of the antennas is provided with a capacitor. The antennas are separated from one another by a gap and are coupled to each other by a conductor.

IPC Classes  ?

• H01Q 9/00 - Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements

Goods & Services

computer software for digital-signal processing, namely, an object-oriented program that permits the systematic reuse of existing, tested components with new, user-written components in problem areas of digital-signal processing, such as signal processing, data display, networking, graphical user interface design, and hardware control

Goods & Services

computer software for digital-signal processing, namely, an object-oriented program that permits the systematic reuse of existing, tested components with new, user-written components in problem areas of digital-signal processing, such as signal processing, data display, networking, graphical user interface design, and hardware control