A calibration link, a signal transmission link, an integrated circuit, an electromagnetic wave device, and an apparatus. A signal transmission main path is configured to transmit an electromagnetic wave signal, the calibration link is integrated in the integrated circuit comprising the signal transmission main path, and the calibration link is at least connected between the signal transmission main path and an antenna corresponding to the signal transmission main path; the calibration link is configured to calibrate the signal transmission main path to obtain calibration information; the signal transmission main path is configured to undergo a calibration operation on the basis of the calibration information obtained by the calibration link, and the calibrated signal transmission main path transmits the electromagnetic wave signal.
H04B 17/21 - Monitoring; Testing of receivers for correcting measurements
2.
SIGNAL TRANSMISSION LINK, SIGNAL CALIBRATION LINK, SIGNAL COMPENSATION LINK, SIGNAL TRANSCEIVING LINK, INTEGRATED CIRCUIT, ELECTROMAGNETIC WAVE SENSOR, AND DEVICE
The present disclosure relates to the technical field of electromagnetic wave sensors, and in particular to a signal transmission link, a calibration signal link, a signal compensation link, a signal transceiving link, an integrated circuit, an electromagnetic wave sensor, and a device. The transmission link comprises an analog signal source and a digital phase shifter, wherein the analog signal source may be configured to provide an initial analog signal, and the digital phase shifter may be configured to generate a phase shift signal in a digital domain, and perform phase shifting on the initial analog signal on the basis of the phase shift signal, so as to perform a preset phase shift operation on the initial analog signal, such that the phase modulation resolution and phase modulation accuracy are effectively improved, and an off-line calibration operation on a link and a device such as a phase shifter in the transmission link can also be avoided, thus reducing the complexity and difficulty of engineering implementation. In addition, the area and loss of a transmission link having a phase shifter architecture can also be effectively reduced, thereby improving the stability of a system, and reducing a channel coupling degree.
Disclosed in the present application are a signal processing method and link, and a target detection method and an electronic device. For an FMCW radar having at least two receiving channels and unequal-length lines, the unequal-length receiving of a digital baseband signal is compensated for in a digital domain according to a length difference between the receiving channels, such that the problem of the generation of a relative time delay between different receiving channels which is inevitably caused by a line length difference, is eliminated, thereby improving the signal receiving quality, and further improving the receiving performance.
H04B 1/525 - Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
G01S 7/35 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group - Details of non-pulse systems
G01S 7/41 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group using analysis of echo signal for target characterisation; Target signature; Target cross-section
G01S 13/58 - Velocity or trajectory determination systems; Sense-of-movement determination systems
G01S 13/522 - Discriminating between fixed and moving objects or between objects moving at different speeds using transmissions of interrupted pulse modulated waves
42 - Scientific, technological and industrial services, research and design
Goods & Services
Communications by cellular phones; message sending;
communications by telephone; communications by telegrams;
communications by fibre optic networks; providing
telecommunications connections to a global computer network;
providing access to databases; communications by computer
terminals; radio broadcasting; news agency services. Technological research; research in the field of
telecommunications technology; scientific research;
integrated circuit design; calibration (measuring);
information technology (IT) consultancy; consultancy in the
design and development of computer hardware; updating of
computer software; computer software design.
5.
Signal Processing Method and Device, Radar, Medium, Program Product and Terminal
The disclosed are a signal processing method, a signal processing device, a radar, a medium, a program product and a terminal. The method is applied to the radar, the radar includes M transmit channels, and the method includes: transmitting, during a first transmit cycle, a first detection signal through the M transmit channels; transmitting, during a second transmit cycle, a second detection signal through ml transmit channels in the M transmit channels, where m1
G01S 7/35 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group - Details of non-pulse systems
G01S 13/58 - Velocity or trajectory determination systems; Sense-of-movement determination systems
6.
ANTENNA, RADAR SENSING SYSTEM, AND ELECTRONIC DEVICE
The antenna includes: a first antenna structure extending along a first direction and having a first side and a second side. The antenna further includes multiple second antenna structures arranged along the first direction, where each of the multiple second antenna structures is connected to the first side and extends in a direction opposite to the second direction with an extension length of k1×(λ/2). The antenna further includes multiple third antenna structures arranged along the first direction, where each of the multiple third antenna structures is connected to the second surface and extends along the second direction with an extension length of k2×(λ/2). The multiple second antenna structures and the multiple third antenna structures are arranged alternatingly along the first direction. One of k1 and k2 is a positive integer greater than 1, and the other is a positive integer greater than or equal to 1.
The present disclosure provides a phase-locked loop, a radio frequency transmitter, a radar sensor and an electronic device. The phase-locked loop includes a phase-locked loop circuit, a charge compensation circuit and a digital modulation controller. The phase-locked loop circuit is connected to the charge compensation circuit. The digital modulation controller is connected to the phase-locked loop circuit and configured to output a frequency control signal so as to cause the phase-locked loop circuit to generate a valid interval of a frequency modulated signal in accordance with the frequency control signal. The digital modulation controller is further connected to the charge compensation circuit and configured to control the charge compensation circuit to regulate charges in the phase-locked loop circuit during an invalid interval of the frequency modulated signal to shorten a duration of frequency callback of the frequency modulated signal.
H03L 7/099 - Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop - Details of the phase-locked loop concerning mainly the controlled oscillator of the loop
09 - Scientific and electric apparatus and instruments
38 - Telecommunications services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Computer programs [downloadable software]; Microwave antennas; Navigational apparatus for automobiles; Radar apparatus; Distance measuring apparatus; chips [integrated circuits]; integrated circuits; Semiconductor devices; Sensors; Sensors for measuring speed; Radar machines and apparatus. communications by cellular phones; message sending; communications by telephone; communications by telegrams; communications by fibre optic networks; providing telecommunications connections to a global computer network; providing access to databases; communications by computer terminals; radio broadcasting; news agency services. technological research; research in the field of telecommunications technology; scientific research; Design of integrated circuits; calibration [measuring]; information technology [it] consultancy; consultancy in the design and development of computer hardware; updating of computer software; computer software design; Technical consultancy in relation to the production of semiconductors.
42 - Scientific, technological and industrial services, research and design
Goods & Services
Communications by cellular phones; electronic message sending; communications by telephone; communications by telegrams; communications by fibre optic networks; providing telecommunications connections to a global computer network; providing access to databases; communications by computer terminals; radio broadcasting; news agency services for electronic transmission Technological research in the area of semiconductor chips technology; research in the field of telecommunications technology; scientific research; design of integrated circuits; calibration (measuring); information technology consulting services relating to installation, maintenance and repair of computer software; consultancy in the design and development of computer hardware; updating of computer software; computer software design
12.
ANTENNA IN PACKAGE, RADIO FREQUENCY CHIP, TEST DEVICE AND TEST METHOD
The present disclosure provides an antenna in package, a RF chip, a test device and a test method. The antenna in package includes at least one antenna, one or more coupling structures and at least one testing terminal. The at least one antenna, the one or more coupling structures and the at least one testing terminal are disposed in a package body. The one or more coupling structures are coupled to one or more radiation units of the at least one antenna, and each coupling structure of the one or more coupling structures is coupled to a respective testing terminal of the at least one testing terminal. The one or more coupling structures are configured to transmit RF test signals of a RF link in which the one or more radiation units are disposed during testing the RF link.
The present disclosure provides a signal processing method, a storage medium, an integrated circuit, a device, and a terminal. The method is applied to perform interference detection and/or constant false alarm detection on signal units of a discrete signal to be detected, and includes: obtaining, for any signal unit, a signal statistical characteristic value of a respective discrete point in the signal unit; determining, based on the signal statistical characteristic value of the respective discrete point, a detection threshold for the signal unit; and, based on the detection threshold, performing constant false alarm detection, and/or, determining whether the respective discrete point is subject to interference.
The embodiments of the present disclosure relate to the technical field of signal processing. Disclosed are a MIMO sensor, a method for determining a direction-of-arrival approximation degree, and a target information matching method. The method for determining the direction-of-arrival approximation degree includes: respectively obtaining receiving vectors of a first target and a second target according to a processing result of a multi-channel echo signal, calculating a correlation coefficient between the receiving vectors of the first target and the second target, and determining a direction-of-arrival approximation degree between the first target and the second target according to the correlation coefficient. By using the method for determining the direction-of-arrival approximation degree, the real-time performance of multi-channel echo signal processing can be improved.
G01S 7/41 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group using analysis of echo signal for target characterisation; Target signature; Target cross-section
G01S 3/46 - Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems
G01S 13/58 - Velocity or trajectory determination systems; Sense-of-movement determination systems
15.
Frequency Multiplier, Signal Transmitter and Radar Chip
Disclosed are a frequency multiplier, a signal transmitter and a radar chip. The frequency multiplier includes a signal generator that is configured to receive an FMCW signal and output a square wave signal at a frequency same as a frequency of the FMCW signal; and a third harmonic amplifier that is coupled to the signal generator and is configured to amplify a third harmonic wave in the square wave signal and output a frequency-tripled FMCW signal. The above-mentioned solution can improve the generation efficiency of the frequency-tripled signal.
H03K 5/00 - Manipulation of pulses not covered by one of the other main groups of this subclass
H03H 11/04 - Frequency selective two-port networks
H03K 17/56 - Electronic switching or gating, i.e. not by contact-making and -breaking characterised by the use of specified components by the use, as active elements, of semiconductor devices
H03K 19/20 - Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits characterised by logic function, e.g. AND, OR, NOR, NOT circuits
16.
CALIBRATION CIRCUIT AND METHOD, PHASE-SHIFT CIRCUIT, RADIO-FREQUENCY TRANSCEIVER CIRCUIT, RADAR AND DEVICE
A calibration circuit and a calibration method for a phase shifter, a phase-shift circuit, a radio frequency transmitting circuit, a radio frequency receiving circuit, a radar sensor and an electronic device are provided. The calibration circuit for the phase shifter includes a phase acquisition circuit and a phase calibration circuit, the phase acquisition circuit coupled to the phase shifter is configured to modulate a radio frequency sample signal acquired from the phase shifter using a first baseband signal, down-convert the modulation signal to obtain a second baseband signal containing an actual phase; the phase calibration circuit coupled to the phase acquisition circuit is configured to acquire the actual phase in the second baseband signal, determine calibration phase information according to a phase deviation between the actual phase and a preset phase-shift phase, generate a phase-shift control signal according to calibration phase information and transmit it to the phase shifter.
G01S 7/03 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group - Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
G01S 13/28 - Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein the transmitted pulses use a frequency- or phase-modulated carrier wave with time compression of received pulses
H03C 3/40 - Angle modulation by converting amplitude modulation to angle modulation using two signal paths the outputs of which have a predetermined phase difference and at least one output being amplitude-modulated
17.
PHASE-LOCKED LOOP, RADAR SYSTEM AND METHOD FOR RANDOMIZING INITIAL PHASES OF FMCW SIGNALS
Embodiments of the present disclosure disclose a phase-locked loop, a radar system and a method for randomizing initial phases of FMCW signals. The phase-locked loop includes a phase-locked loop circuit and a random control signal generator. In response to a clock signal indicating a respective target moment of one or more target moments, the random control signal generator inputs a random control signal to the phase-locked loop circuit, so that the accumulated value of the plurality of fractional frequency division values is converted into a random value, and that a plurality of phase differences respectively corresponding to the plurality of chirp signals form a non-arithmetic sequence.
H03L 7/197 - Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division
G01S 7/35 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group - Details of non-pulse systems
G06F 7/58 - Random or pseudo-random number generators
H03K 3/84 - Generating pulses having a predetermined statistical distribution of a parameter, e.g. random pulse generators
H03L 7/085 - Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop - Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
18.
DATA COMPRESSION METHOD AND APPARATUS, AND DATA DECOMPRESSION METHOD AND APPARATUS
A data compression method, apparatus, a data decompression method and apparatus are provided. In the methods and apparatuses, on the basis of an average effective bit value of data in a data block and an average storage bit width occupied by the remaining part of each item of data in the compressed data block, compression of a fixed compression rate is implemented on the remaining part of the data, reducing the storage space occupied by the remaining part of the data whilst allowing for quick restoration of the compressed data into the original data.
The present application discloses a method and apparatus for determining the number of real targets corresponding to a constant false alarm target, a method for determining the number of real targets, an integrated circuit, a radio device, a terminal device, and a non-transitory computer readable storage medium. For any constant false alarm target point, by acquiring combined projection energy of real targets, energy of hypothetical targets, and energy of the constant false alarm target point on the basis of a constant false alarm target point signal vector, constructing a preset target signal vector on the basis of each obtained energy, and then determining the number of real targets corresponding to the constant false alarm target point on the basis of at least one set of preset determination coefficients, subsequent accurate direction-of-arrival estimation is facilitated.
G01S 7/41 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group using analysis of echo signal for target characterisation; Target signature; Target cross-section
G01S 7/48 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group
20.
SEMICONDUCTOR INTEGRATED CIRCUIT, PHASE-LOCKED LOOP, RADAR AND ELECTRONIC DEVICE
A semiconductor integrated circuit, a phase-locked loop, a radar sensor and an electronic device. The semiconductor integrated circuit comprises a substrate layer and a plurality of insulated metal layers, which are arranged on the substrate layer, wherein the plurality of metal layers comprise a shielding structure layer (100), a first device structure layer and a plurality of second device structure layers. The semiconductor integrated circuit contains an oscillator used for outputting a differential signal, and the oscillator contains: a first inductor and a second inductor, which are formed in different second device structure layers; a capacitor device, which is formed in the first device structure layer; and a first transistor and a second transistor, which are formed in the substrate layer, wherein the first inductor and the second inductor are symmetric about the same axis of symmetry, and the shielding structure layer is provided with a shielding structure used for shielding interference signals leaked by the first inductor and/or the second inductor.
H01L 23/552 - Protection against radiation, e.g. light
G01S 7/02 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group
A charge pump, a phase-locked loop, a radar sensor, and an electronic device. The charge pump is applicable to the phase-locked loop, and the phase-locked loop enters a locked state when two input clock signals are in the same frequency and the same phase. The charge pump comprises: a discharging circuit (200) and a charging circuit (300), both the discharging circuit (200) and the charging circuit (300) being connected to an output end of the charge pump. The discharging circuit (200) reduces a current of the output end under the control of a first control signal, and the charging circuit (300) increases the current of the output end under the control of a second control signal, the first control signal and the second control signal being corresponding error signals between the two clock signals. The charge pump further comprises a voltage control circuit, wherein the voltage control circuit is connected to a first node in the discharging circuit (200) and/or a second node in the charging circuit (300), so as to maintain the locked state of the phase-locked loop by controlling voltages of the corresponding nodes, the first node and the second node being both connected to the output end.
H03L 7/08 - Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop - Details of the phase-locked loop
22.
DATA COMPRESSION METHOD AND APPARATUS, AND DATA DECOMPRESSION METHOD AND APPARATUS
A data compression method, apparatus, a data decompression method and apparatus are provided. In the methods an apparatuses, on the basis of an average effective bit value of data in a data block and an average storage bit width occupied by e remaining part of each item of data in the compressed data block, compression of a fixed compression rate is implemented on the remaining part of the data, reducing the storage space occupied by the remaining part of the data whilst allowing for quick restoration of the compressed data into the original data.
Embodiments of the present disclosure provide a method and apparatus for determining a noise floor estimated value, a target detection method and apparatus, and an electronic device. The determining method comprises: obtaining a two-dimensional Fourier data plane corresponding to a linear frequency modulation continuous wave, wherein the two-dimensional Fourier data plane comprises a distance dimension and a Doppler dimension, and the distance dimension comprises a plurality of distances gates; and for each distance gate, determining a noise floor estimated value according to a plurality of two-dimensional Fourier transform energy data of the distance gate along the Doppler dimension. According to the technical solution provided by the embodiments of the present disclosure, the noise floor estimated value of each distance gate is determined, and the efficiency and accuracy of the determined noise floor estimated value are improved.
G01S 7/35 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group - Details of non-pulse systems
G01S 13/58 - Velocity or trajectory determination systems; Sense-of-movement determination systems
24.
INTERFERENCE SIGNAL DETECTION METHOD AND APPARATUS, AND INTEGRATED CIRCUIT, RADIO DEVICE AND TERMINAL
An interference signal detection method, apparatus, integrated circuit, radio device and terminal are disclosed, wherein, the method includes: transmitting a target signal based on a radar, receiving N frames of echo signals, obtaining N pieces of 2D FFT plane information according to the N frames of echo signals, wherein any piece of 2D FFT plane information includes power information corresponding to a range and a velocity, and detecting whether an echo signal is interfered according to accumulated power information corresponding to the range gate in the piece of 2D FFT plane information. In this way, the interference is characterized by the accumulated power information, which has good robustness and simple operations, and can achieve low power consumption of the radar system.
G01S 7/02 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group
G01S 7/35 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group - Details of non-pulse systems
G01S 7/41 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group using analysis of echo signal for target characterisation; Target signature; Target cross-section
G01S 13/58 - Velocity or trajectory determination systems; Sense-of-movement determination systems
G01S 13/64 - Velocity measuring systems using range gates
25.
METHOD AND APPARATUS FOR DETERMINING DATA STORAGE BIT WIDTH, AND METHOD FOR STORING INDEX DATA
A method and apparatus for determining a data storage bit width and a method for storing exponential data. The method for determining the data storage bit width includes: acquiring data to be stored, the number of which is at least 4; dividing the data into blocks according to a preset number 2n, n is an integer greater than or equal to 2; determining effective bit numbers and a value of a maximum effective bit number in a block; dividing data in the block equally into a first sub-block and a second sub-block, acquiring effective bit numbers in first and second sub-blocks; performing a differential calculation on effective bit numbers in first and second sub-blocks to obtain an effective differential value; determining a storage bit width for storing effective differential value according to a preset storage bit width interval to which the value of maximum effective bit number belongs.
A data processing method is provided, which can be applied to calculating a histogram of a preset data sequence. Each piece of data in the preset data sequence comprises an exponential part and a mantissa part. The method comprises: performing normalization processing on the preset data sequence to obtain a first index and a first mantissa of each data; according to the first index and the first mantissa of each data, generating a register address; and according to the register address, adjusting a numerical value in the corresponding register. The data processing method provided by the disclosure can be used in the process of statistical sorting of fixed point non-negative real number data such as ADC sampling data, floating point non-negative real number data such as two-dimensional FFT power data, and other types of data.
G01S 7/35 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group - Details of non-pulse systems
G01S 13/58 - Velocity or trajectory determination systems; Sense-of-movement determination systems
27.
TRANSMISSION LINE PHASE SHIFTER, SYSTEM, CHIP, AND RADAR SENSOR
A transmission line phase shifter, a chip, and a radar sensor are provided. The transmission line phase shifter includes at least one transmission line phase-shifting unit. At a calibration stage, a preset number of transmission line phase-shifting units are configured to be in a state of a first phase or in a state of a second phase and configured to output an output RF signal, such that phase calibration information of each transmission line phase-shifting unit is determinable. At an operation stage, the phase adjusting circuit of the respective transmission line phase-shifting unit is configured to receive a corresponding phase shifting control signal and to adjust the respective transmission line phase-shifting unit, to enable the respective transmission line phase-shifting unit to shift a phase of an input RF signal by a calibrated first phase or a calibrated second phase.
H01Q 3/38 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase by electrical means with variable phase-shifters the phase-shifters being digital
G01S 7/02 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group
G01S 7/03 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group - Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
A transmission line phase shifter, a system, a chip, and a radar sensor are provided. The transmission line phase shifter includes at least one transmission line phase-shifting unit. A respective transmission line phase-shifting unit includes a first pair of differential transmission lines, a second pair of differential transmission lines, and a phase adjusting circuit. The phase adjusting circuit is configured to adjust electrical parameters of a transmission path where at least one pair of transmission lines of the first pair of differential transmission lines and the second pair of differential transmission lines is located according to at least one phase shifting control signal received, so as to enable that a RF signal output from the respective transmission line phase-shifting unit has a phase shift of a first phase or a second phase relative to an input RF signal of the respective transmission line phase-shifting unit.
H01P 1/185 - Phase-shifters using a diode or a gas filled discharge tube
H01P 5/18 - Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
A phase shifting system, a chip, and a radar sensor are provided. A respective transmission line phase-shifting unit is configured to receive at least one phase shifting control signal and to shift a phase of a RF signal by a first phase or a second phase. Each transmission line phase-shifting unit includes a first group of transmission lines and a second group of transmission lines. At least some transmission lines in the first group of transmission lines of each transmission line phase-shifting unit are physically isolated from at least some transmission lines in the first group of transmission lines of an adjacent transmission line phase-shifting unit and transmission lines of the second group of transmission lines of each transmission line phase-shifting unit are coupled to respective transmission lines of the second group of transmission lines of an adjacent transmission line phase-shifting unit.
G01S 7/03 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group - Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
G01S 7/02 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group
G01S 13/32 - Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
30.
RADIO FREQUENCY INVERTER, TRANSMISSION LINE PHASE SHIFTER, SYSTEM, CHIP, AND RADAR SENSOR
A radio frequency (RF) inverter, a transmission line phase shifter, a system, a chip, and a radar sensor are provided. The RF inverter includes an inductance circuit and a first phase adjusting circuit that both are arranged symmetrically along a same symmetry axis. The inductance circuit includes a single-ended signal interface and a differential signal interface. The first phase adjusting circuit includes two controlled switches, and each controlled switch is connected between the ground wire and a corresponding ground terminal of a pair of ground terminals in the single-ended signal interface, to enable the inductance circuit to perform in-phase or inverting phase shifting on a received RF signal.
H01Q 3/26 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture
H01Q 3/36 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase by electrical means with variable phase-shifters
31.
PHASE SHIFT SYSTEM, RADIO-FREQUENCY CHIP AND RADAR SENSOR
Provided in the present application are a phase shift system, a chip and a radar sensor. The phase shift system comprises at least two cascaded transmission-line phase shift units, wherein each transmission-line phase shift unit is controlled by at least one phase shift control signal, such that the transmission-line phase shift unit performs a phase shift on a radio-frequency signal according to a first phase or a second phase; each transmission-line phase shift unit at least comprises a plurality of groups of transmission lines; and at least some transmission lines in respective first groups of transmission lines in the two cascaded transmission-line phase shift units are physically isolated from each other and are connected by means of respective second groups of transmission lines. The phase shift system is used for solving the problem of a phase shift linearity being reduced due to a transmission path of a transmission-line phase shifter being relatively long.
A transmission line phase shifter, comprising at least one transmission line phase shift unit (11), wherein the transmission line phase shift unit (11) comprises a first pair of differential transmission lines (Sig1_P, Sig1_N), a second pair of differential transmission lines (Sig2_P, Sig2_N) and a phase adjustment circuit (21). According to at least one input phase shift control signal, the phase adjustment circuit (21) adjusts electrical parameters of transmission paths where the first pair of differential transmission lines (Sig1_P, Sig1_N) and/or the second pair of differential transmission lines (Sig2_P, Sig2_N) are located, so that radio frequency signals (Output_P, Output_N) outputted by the transmission line phase shift unit (11) have a first phase or second phase with respect to radio frequency signals (Input_P, Input_N) input into said unit.
H03K 19/094 - Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using semiconductor devices using field-effect transistors
G01S 7/02 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group
33.
TRANSMISSION LINE PHASE SHIFTER, SYSTEM, CHIP AND RADAR SENSOR
Provided in the present application are a transmission line phase shifter, a system, a chip and a radar sensor. The transmission line phase shifter comprises at least one transmission line phase shifting unit, wherein the transmission line phase shifting unit comprises a phase adjustment circuit and a plurality of groups of transmission lines. During calibration, a preset number of transmission line phase shifting units, as a whole, are respectively in the state of a first phase and the state of a second phase before calibration, and transmit radio frequency signals, so as to determine phase calibration information of each transmission line phase shifting unit by means of measuring actual phases, before calibration, of the radio frequency signals, which are transmitted in the different states. During operation, the phase adjustment circuits in the transmission line phase shifter adjust corresponding transmission line phase shifting units according to received phase shifting control signals, such that the transmission line phase shifter performs phase shifting on input radio frequency signals according to a calibrated first phase or second phase, wherein the phase shifting control signals are generated using the phase calibration information.
Provided in the present application are a radio-frequency phase inverter, a transmission line phase shifter, a system, a chip and a radar sensor. The radio-frequency phase inverter comprises an inductance circuit and a first phase adjustment circuit, which are symmetrically arranged with respect to the same axis of symmetry, wherein the inductance circuit comprises a single-ended signal interface and a differential signal interface; and the first phase adjustment circuit comprises two controlled switches, each controlled switch being connected between a ground line and a ground end in the single-ended signal interface, such that the inductance circuit performs in-phase or out-of-phase shift on a received radio frequency signal. In this way, a circuit structure, which is in a completely symmetrical layout, is provided, thereby effectively reducing phase errors during in-phase and out-of-phase shift.
G01S 13/58 - Velocity or trajectory determination systems; Sense-of-movement determination systems
H03K 19/094 - Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using semiconductor devices using field-effect transistors
A method and apparatus for improving target detection precision, an electronic device, and a non-transient computer-readable storage medium. The method comprises: obtaining a discrete spectrum function of an echo signal according to the discrete spectrum analysis process of the echo signal, wherein an independent variable of the discrete spectrum function is an offset between discrete point data obtained in discrete spectrum analysis on the basis of energy and target real data; constructing an inverse function of the discrete spectrum function by using the discrete spectrum function, wherein an independent variable of the inverse function is a discrete spectrum value of the echo signal; and calculating the offset by using the inverse function.
G01S 7/41 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group using analysis of echo signal for target characterisation; Target signature; Target cross-section
36.
SIGNAL PROCESSING METHOD, STORAGE MEDIUM, INTEGRATED CIRCUIT, DEVICE, AND TERMINAL EQUIPMENT
A signal processing method, a storage medium, an integrated circuit, a device, and terminal equipment. The signal processing method is applied to performing interference detection and/or constant false alarm detection on a signal unit in a discrete signal to be detected, and comprises: for any signal unit, acquiring a signal statistical characteristic value of each discrete point in the signal unit (101); determining a detection threshold of the signal unit on the basis of the signal statistical characteristic value of each discrete point (102); and performing constant false alarm detection on the basis of the detection threshold, and/or determining whether each discrete point is interfered (103).
A frequency multiplier, a signal transmitter, and a radar chip. The frequency multiplier comprises: a signal generator, used for receiving a frequency modulated continuous wave (FMCM) signal, and outputting a square wave signal having the same frequency as the FMCW signal; and a third harmonic amplifier, coupled to the signal generator, and used for amplifying third harmonic in the square wave signal and outputting a frequency tripled FMCW signal. The solution can improve the generation efficiency of a frequency tripled signal.
A calibration circuit (20) for a phase shifter (10), a calibration method, a phase-shifting circuit, a radio-frequency transmitting circuit, a radio-frequency receiving circuit, a radar sensor, and an electronic device. The calibration circuit (20) for a phase shifter (10) comprises a phase collection circuit (21) and a phase calibration circuit (22), wherein the phase collection circuit (21) is coupled to the phase shifter (10), and is configured to collect a radio-frequency signal that is output by means of the phase shifter (10), use a first baseband signal to modulate a radio-frequency sampling signal that is collected from the phase shifter (10), and down-converts, to a baseband, a modulated signal obtained after modulation, so as to obtain a second baseband signal, which includes the actual phase; and the phase calibration circuit (22) is coupled to the phase collection circuit (21), and is configured to acquire the actual phase in the second baseband signal, determine calibration phase information of the phase shifter (10) according to a phase deviation between the actual phase and a preset phase-shifting phase, and generate, according to the calibration phase information, a phase-shifting control signal that is sent to the phase shifter (10).
A solder ball detection apparatus (20), a printed circuit board (15), a radio frequency chip (11), and an electronic device. Signal pins of the radio frequency chip (11) are fixed to the printed circuit board (15) by means of solder balls (13); the solder ball detection apparatus (20) is used for detecting a soldering state of the solder balls (13); the solder ball detection apparatus (20) is electrically connected to the solder balls (13); the solder ball detection apparatus (20) comprises: a reference signal generation unit (21) for generating a reference signal, wherein the reference signal is used for representing a soldering state of the solder balls (13) in at least one loss condition; a sampling unit (23) for collecting a sampling signal of a circuit loop where the solder balls (13) are located; and a detection unit (25) for detecting the sampling signal by means of the reference signal to output state information reflecting the soldering state of the solder balls (13).
A signal processing method and apparatus, and a radar, a medium, a program product and a terminal. The method is applied to a radar that comprises M transmitting channels. The method comprises: within a first transmission period, transmitting a first detection signal by means of M transmitting channels (S110); within a second transmission period, transmitting a second detection signal by means of m1 channels among the M channels, wherein m1 < M, and M is an integer greater than 0 (S120); and processing a first echo signal and a second echo signal, and determining the correspondence between the first echo signal and the M transmitting channels, wherein the first echo signal and the second echo signal are respectively signals after the first detection signal and the second detection signal are reflected by means of a target (S130). Same is conducive to better meeting radar measurement requirements.
The sensing system includes at least one chip branch. In the chip branch, a clock circuit of each sensing chip integrates the received working clock signal to obtain stable clock signal that has a relative high frequency to be subjected to frequency dividing, and a frequency dividing circuit performs frequency dividing processing on the clock signal to obtain a working clock signal required by a next-stage sensing chip. In the cascade structure, a clock source only needs to satisfy the driving requirement of a first-stage sensing chip, and the working clock signal required by each of other sensing chips is provided by a previous-stage sensing chip, such that the problem that the number of sensing chips connected in series in the chip branch is limited by the driving capability of the clock source is solved, and the applicability of the sensing system is widened.
H04L 7/033 - Speed or phase control by the received code signals, the signals containing no special synchronisation information using the transitions of the received signal to control the phase of the synchronising-signal- generating means, e.g. using a phase-locked loop
The present application relates to the technical field of integrated circuit packaging. Provided are an antenna-in-package (AiP), a radio-frequency chip, a test apparatus, and a test method. The AiP comprises an antenna, a coupling structure and a test end, wherein the antenna, the coupling structure and the test end are all arranged in a packaging body; the coupling structure is coupled to a radiation unit of the antenna and the test end, and the coupling structure is used for transmitting a radio-frequency test signal of a radio-frequency link when the radio-frequency link where the radiation unit is located is tested. With regard to the AiP, a radio-frequency test signal of a radio-frequency link is transmitted by means of a coupling structure, such that there is no need to additionally provide an external load plate, thereby improving the stability of a transceiving link of the radio-frequency test signal. Therefore, the transceiving link of the radio-frequency test signal of an AiP chip can be stably and reliably tested.
A delay calibration circuit and method, an analog-to-digital converter, a radar sensor, and a device are provided. The delay calibration circuit monitors a timing relationship between signals in a chip in real time to extract PVT information, dynamically adjusts conversion timing of an asynchronous SAR ADC, maximally utilizes an available conversion time in each cycle of the asynchronous SAR ADC, improves the robustness of the asynchronous SAR ADC, and does not affect the normal operation of the asynchronous SAR ADC.
G01S 7/35 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group - Details of non-pulse systems
Embodiments of the present application relate to the technical field of phase lock loops, and provides a phase lock loop device, a locking method for the phase lock loop device and a radar system. The phase lock loop device comprises a filter (10), a first power supply (20), a monitoring controller (30) and an oscillator (40). The output end of the filter (10) is coupled to the control end of the first power supply and is used for providing a drive control signal generated on the basis of the frequency phase deviation of a reference signal and a feedback signal, wherein the feedback signal is obtained after a frequency multiplication signal output by the phase lock loop device are subjected to frequency division processing. The first power supply (20) is coupled to the filter (10) and the oscillator (40) and is used for providing a power signal to the oscillator according to the drive control signal. The monitoring controller (30) is coupled to the first power supply (20) to acquire a sampling signal and is used for adjusting an electrical parameter of the oscillator (40) by detecting the sampling signal. The phase lock loop device is always in a locked state, and the stability and accuracy of the phase lock loop device are improved.
H03L 7/085 - Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop - Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
H03L 7/093 - Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop - Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using special filtering or amplification characteristics in the loop
H03L 7/099 - Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop - Details of the phase-locked loop concerning mainly the controlled oscillator of the loop
H03L 7/18 - Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
G01S 7/02 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group
45.
VIDEO COMPRESSION METHOD AND APPARATUS, AND COMPUTER READABLE STORAGE MEDIUM
A video compression method and apparatus, and a computer-readable storage medium. The video compression method comprises: acquiring a detection result of a first sensor, and determining a target motion parameter according to the detection result; determining a video compression parameter according to the target motion parameter; and performing video compression on first video data according to the video compression parameter. A video compression ratio can be dynamically adjusted according to detection results of the first sensor, and thereby the efficiency of video compression, transmission, or storage is improved.
Embodiments of the present application relate to the technical field of antennas, and disclosed thereby are an antenna, a radar sensing system, and an electronic device. The antenna comprises: a first antenna structure (101), extending in a first direction and having a first side (111) and a second side (121); a plurality of second antenna structures (102) that are arranged in the first direction, are connected to the first side (111), and extend by k1 * (λ / 2) in a direction away from the first side (111); and a plurality of third antenna structures (103) that are arranged in the first direction, are connected to the second side (121), and extend by k2 * (λ / 2) in a direction away from the second side (121). The second antenna structures (102) and the third antenna structures (103) are arranged at intervals in the first direction. One of k1 and k2 is a positive integer greater than 1, and the other one of k1 and k2 is a positive integer greater than or equal to 1. The present invention at least facilitates increasing the radiation angle range of the antenna without significantly increasing the complexity and power loss of the antenna.
The radar signal processing method includes: after an echo signal is mixed based on a local oscillator signal, and digital signal processing is performed to obtain a signal to be processed, the signal to be processed is subtracted based on a datum difference frequency signal to obtain a target signal, and a travelling speed of a target relative to a radar and/or a distance of the target relative to the radar is determined according to the target signal. Since the datum differential frequency signal is a signal obtained by mixing a leakage signal based on the local oscillator signal and performing the digital signal processing in a target free environment. Therefore, subtracting the signal to be processed based on the datum differential frequency signal can effectively reduce the content of the leakage signal in the signal to be processed, thereby improving the accuracy of the measurement results.
G01S 7/35 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group - Details of non-pulse systems
G01S 13/58 - Velocity or trajectory determination systems; Sense-of-movement determination systems
48.
PHASE-LOCKED LOOP, RADIO FREQUENCY SIGNAL TRANSMITTER, RADAR SENSOR AND ELECTRONIC DEVICE
The present application provides a phase-locked loop, a radio frequency signal transmitter, a radar sensor and an electronic device. The phase-locked loop comprises a phase-locked loop circuit, a controlled charge compensation circuit and a digital modulation controller. The phase-locked loop circuit is connected to the charge compensation circuit. The digital modulation controller is connected to the phase-locked loop circuit and outputs a frequency control signal, so that the phase-locked loop circuit generates a valid interval of a frequency modulation signal according to the frequency control signal. The digital modulation controller is further connected to the charge compensation circuit, and the charge compensation circuit is controlled to adjust a charge in the phase-locked loop circuit in an invalid interval of the frequency modulation signal, so as to shorten the duration of frequency callback of the frequency modulation signal.
H03L 7/085 - Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop - Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
49.
PHASE LOCK LOOP, RADAR SYSTEM, AND METHOD FOR RANDOMIZING INITIAL PHASE OF FMCW SIGNAL
A phase lock loop, a radar system, and a method for randomizing an initial phase of an FMCW signal. The phase lock loop comprises a phase lock circuit (100) and a random control signal generator (200). Every time a clock signal reaches a target point in time, the random control signal generator (200) inputs a random control signal to the phase lock circuit (100), so that an accumulated value of fractional division values of the phase lock circuit (100) is changed to a random value, and thus in a plurality of chirp signals output by the phase lock circuit (100), an initial phase difference of a spurious signal relative to a main signal is in not in a constant-difference change. Speed information caused by the spurious signal is distributed on different speed dimensions, so that the intensity of the spurious signal on a single speed dimension is reduced, two false signals having fixed speeds are avoided, and the detection accuracy of the radar system is improved; in addition, the phase of each chirp signal is randomly changed, so that the anti-interference capability of the radar system is improved.
H03L 7/18 - Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
H03L 7/085 - Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop - Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
50.
METHOD FOR IMPROVING TARGET DETECTION ACCURACY, AND INTEGRATED CIRCUIT, AND RADIO DEVICE
Embodiments of the present disclosure provide a method for improving object detection accuracy, a computer device, a storage medium, an integrated circuit, a radio device, and an electronic device, and relate to the technical field of radar signal processing. The method for improving object detection accuracy includes: obtaining a velocity ambiguity factor and object peak data based on an echo signal (step 301), compensating the object peak data based on the velocity ambiguity factor (step 302), and obtaining the object data based on the compensated peak data, where the object data is adopted as real object data (step 303). Compared with the object data obtain in a conventional way, the real object data obtained by the method for improving object detection accuracy is more accurate, and this is especially true when the object velocity is excessive high.
G01S 7/35 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group - Details of non-pulse systems
G01S 13/58 - Velocity or trajectory determination systems; Sense-of-movement determination systems
G01S 7/41 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group using analysis of echo signal for target characterisation; Target signature; Target cross-section
51.
ON-BOARD ANTENNA, RADIO DEVICE, AND ELECTRONIC APPARATUS
An onboard antenna, a radio equipment and an electronic device. The onboard antenna includes a dielectric substrate, an antenna and a metal block, wherein the antenna is located on the dielectric substrate, a projection of the metal block on a plane where the dielectric substrate is located is not overlapped with a projection of the antenna on the plane where the dielectric substrate is located, the metal block is located on the dielectric substrate in a polarization direction of the antenna, and a distance between a metal edge of the metal block on a side close to the antenna and the antenna is greater than a coupling threshold. Using this onboard antenna, an influence of surface waves on the pattern can be suppressed to a certain extent by arranging the metal block, and a jitter of the antenna pattern can be reduced.
Disclosed are a delay calibration circuit and method, an analog-to-digital converter, a radar sensor and a device. The delay calibration circuit monitors in real time a time sequence relationship between signals in a chip so as to extract PVT information; a conversion sequence of an asynchronous SAR ADC is dynamically adjusted, and the available conversion time in each period of the asynchronous SAR ADC is utilized to the maximum extent, thus improving the robustness of the asynchronous SAR ADC without affecting normal operations of the asynchronous SAR ADC.
The disclosure provides a data processing method, which can be applied to calculating a histogram of a preset data sequence. Each piece of data in the preset data sequence comprises an exponential part and a mantissa part. The method comprises: performing normalization processing on the preset data sequence to obtain a first index and a first mantissa of each data; according to the first index and the first mantissa of each data, generating a register address; and according to the register address, adjusting a numerical value in the corresponding register. The data processing method provided by the disclosure can be used in the process of statistical sorting of fixed point non-negative real number data such as ADC sampling data, floating point non-negative real number data such as two-dimensional FFT power data, and other types of data. The statistical classification carried out by the method is high in speed and low in operation complexity, and the data processing efficiency is improved.
G06T 5/40 - Image enhancement or restoration by the use of histogram techniques
G06F 17/18 - Complex mathematical operations for evaluating statistical data
G06F 15/00 - Digital computers in general; Data processing equipment in general
G06F 7/38 - Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
An attenuation apparatus and a test system. The attenuation apparatus includes a signal transmission channel and at least one radiation loss structure, wherein the signal transmission channel is configured to perform transmission attenuation on the energy of a transmitted signal; the radiation loss structure is arranged in the signal transmission channel; the radiation loss structure has a first operating state and a second operating state; when the radiation loss structure is in the first operating state, the radiation loss structure is configured to perform radiation attenuation on the energy of a signal transmitted by the signal transmission channel; and when the radiation loss structure is in the second operating state, the radiation loss structure is configured to perform transmission attenuation on the energy of the signal transmitted by the signal transmission channel.
A microstrip antenna, an antenna array, a radar, and a vehicle are provided. The microstrip antenna includes: a dielectric layer, and a metal layer and a ground plane layer disposed at two sides of the dielectric layer, wherein the metal layer includes a first radiation patch and a feeding portion; a length of a long side edge of the first radiation patch is determined based on an operating wavelength of the microstrip antenna, and a length of a short side edge of the first radiation patch is smaller than the length of the long side edge; the feeding portion is coupled between a center position of the long side edge of the first radiation patch and a short side edge, and the feeding portion is configured to transmit a high frequency signal to the first radiation patch or to transmit a space radiation signal received by the first radiation patch.
Embodiments of the present disclosure provide a waveform control method, a radio device, a radio signal, a signal transmission link and an integrated circuit. The waveform control method includes: calling, by a chip structure, at least two types of frame-configuration parameters from an external storage and storing the frame-configuration parameters in a memory; acquiring a frame order, and calling corresponding frame-configuration parameters from the memory in sequence according to the frame order; and generating frame period signals according to the corresponding frame-configuration parameters. The frame period signals include at least two frames of signals.
A radar angle calibration system is provided according to the present disclosure, including a radar simulator, a receiving horn antenna, a transmitting horn antenna, a turntable, and a controller. The radar is arranged on the turntable, and the radar rotates along with the turntable. The controller is configured to gradually change angle of transmitting the signals with a preset angle step by the turntable to obtain spatial responses of the receiving antenna array corresponding to signal sources in different DoAs, and obtain a spatial response matrix of the receiving antenna array according to the spatial responses corresponding to the signal sources in different DoAs.
Disclosed are a MIMO sensor, a method for determining a direction-of-arrival approximation degree, and a target information matching method, relating to the technical field of signal processing. The method for determining a direction-of-arrival approximation degree comprises: respectively obtaining receiving vectors of a first target and a second target according to processing results of multi-channel echo signals; calculating a correlation coefficient between the receiving vectors of the first target and the second target; and determining a direction-of-arrival approximation degree between the first target and the second target according to the correlation coefficient. By means of the method for determining a direction-of-arrival approximation degree, the real-time performance of multi-channel echo signal processing can be improved.
G01S 7/41 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group using analysis of echo signal for target characterisation; Target signature; Target cross-section
G01S 7/02 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group
59.
Automatic gain control method, sensor, and radio device
An automatic gain control method, sensor (700), and radio device (900); by means of using the saturation information of a test echo unit to adjust the gain coefficient of a transmitting and receiving link, it is ensured that the received signal power used for target detection is located within a rated threshold range, further improving the accuracy of sensor (700) target detection, and avoiding defects such as missed detection, false detection, and even blindness.
H04L 27/10 - Frequency-modulated carrier systems, i.e. using frequency-shift keying
G01S 7/35 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group - Details of non-pulse systems
H04L 1/00 - Arrangements for detecting or preventing errors in the information received
60.
INTERFERENCE SIGNAL DETECTION METHOD AND APPARATUS, AND INTEGRATED CIRCUIT, RADIO DEVICE AND TERMINAL
An interference signal detection method and apparatus (90), and a device (1000). The method comprises: transmitting a target signal on the basis of a radar (S401); receiving N frames of echo signals (S402); obtaining N pieces of 2D FFT plane information according to the N frames of echo signals, wherein any piece of 2D FFT plane information comprises power information corresponding to a range and a speed (S403); and according to accumulated power information corresponding to a range gate in the 2D FFT plane information, detecting whether the echo signals are interfered with (S404). Therefore, interference is represented by means of accumulated power information, such that the robustness is good, the operation is simple, and low power consumption of a radar system can be realized. Also provided is a computer-readable storage medium, an integrated circuit, a radio device, and a terminal device.
A method and apparatus for determining a data storage bit width, and a method for storing index data. The method comprises: obtaining data to be stored, wherein there are at least four pieces of data, and performing block segmentation on the data according to a preset number, wherein the preset number is equal to 2n, n is an integer greater than or equal to 2, and determining an effective bit number and a maximum effective bit number value corresponding to each piece of data in the block; then equally dividing the number of intra-block data and the like into a first sub-block and a second sub-block, and obtaining the effective bit number contained in the first sub-block and the effective bit number contained in the second sub-block, and performing differential calculation on the effective bit number contained in the first sub-block and the effective bit number contained in the second sub-block to obtain an effective differential value; and finally determining a storage bit width for storing the effective differential value according to a preset storage bit width interval to which the maximum effective bit number value belongs. According to the method provided by embodiments of the present disclosure, the storage bit width occupied by the effective bit number of the data is reduced by storing the differential value of the effective bit number of the data.
A method and apparatus for determining a noise floor estimated value, an electronic device and a storage medium. The determining method comprises: obtaining a two-dimensional Fourier data plane corresponding to a linear frequency modulation continuous wave, wherein the two-dimensional Fourier data plane comprises a distance dimension and a Doppler dimension, and the distance dimension comprises a plurality of distance gates (S201); and for each distance gate, determining a noise floor estimated value according to a plurality of two-dimensional Fourier transform energy data of the distance gate along the Doppler dimension (S202). In said method, the noise floor estimated value of each distance gate is determined, and the efficiency and accuracy of the determined noise floor estimated value are improved.
G01S 7/41 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group using analysis of echo signal for target characterisation; Target signature; Target cross-section
G01S 13/50 - Systems of measurement based on relative movement of target
63.
DATA COMPRESSION METHOD AND APPARATUS AND DATA DECOMPRESSION METHOD AND APPARATUS
A data compression method and apparatus and a data decompression method and apparatus. In the methods and apparatuses, on the basis of an average effective bit value of data in a data block and an average storage bit width occupied by the remaining part of each item of data in the compressed data block, compression of a fixed compression rate is implemented on the remaining part of the data, reducing the storage space occupied by the remaining part of the data whilst allowing for quick restoration of the compressed data into the original data.
Disclosed are a radar angle calibration system, a radar chip, and a device. The radar angle calibration system comprises: a radar simulator (30), a transmitting horn antenna (40), a receiving horn antenna (50), a turntable (20) and a controller. A radar (10) is provided on the turntable (20) and rotates along with rotation of the turntable (20). The receiving horn antenna (50) and the transmitting horn antenna (40) are both connected to the radar simulator (30) by means of a waveguide. The radar (10) transmits a signal. The receiving horn antenna (50) receives the transmitted signal of the radar (10), and transmits the transmitted signal to the radar simulator (30) by means of the waveguide. The radar simulator (30) simulates, according to the received signal, an echo signal, and transmits the echo signal to the transmitting horn antenna (40) by means of the waveguide. The transmitting horn antenna (40) transmits the echo signal so that the echo signal is received by the radar (10). The controller, by means of the turntable (20), gradually changes the angle of the transmitted signal at a preset angle step length, so as to obtain a spatial response of a receiving antenna array corresponding to a signal source in different directions of arrival. By obtaining, according to the spatial response corresponding to the signal source in different directions of arrival, a spatial response matrix of the receiving antenna array, the radar angle can be accurately calibrated.
G01S 7/02 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group
65.
WAVEFORM CONTROL METHOD, RADIO DEVICE, AND RADIO SIGNAL AND TRANSMITTING LINK THEREFOR
The embodiments of the present application relate to the technical field of radio. Provided are a waveform control method, a radio device, a radio signal, a signal transmitting link and an integrated circuit. The waveform control method comprises: before frame period signals are transmitted, a chip structure retrieving at least two frame configuration parameters from an external memory, and storing same in a memory; acquiring a frame arrangement order, and on the basis of the frame arrangement order, sequentially retrieving the corresponding frame configuration parameters from the memory; and generating corresponding frame period signals on the basis of the corresponding frame configuration parameters, wherein the frame period signals comprise at least two frame signals. Frame configuration parameters corresponding to a plurality of frames can be retrieved by means of only one instance of configuration, and when two consecutive frames are different, there is no need to reconfigure a radio signal at the beginning of each frame, thereby reducing the time required for configuring a signal which is transmitted by a radio device, and improving the working efficiency of the radio device; moreover, the problem of a radio device being unable to continue to work during a configuration process can also be avoided.
A radar signal processing method, a radio signal processing method and apparatus, an integrated circuit, a radio component, and a device. The radar signal processing method comprises: performing frequency mixing on an echo signal on the basis of a local oscillator signal, and performing digital signal processing, so as to obtain a signal to be processed; on the basis of a baseline difference-frequency signal, performing reduction processing on the signal to be processed, so as to obtain a target signal; and according to the target signal, determining the movement speed of a target object relative to a radar and the distance thereof relative to the radar. The radio signal processing method comprises: on the basis of a reference difference-frequency signal, performing reduction processing on a signal to be processed, so as to obtain a target signal, wherein the reference difference-frequency signal is a signal which is obtained in a preset specific environment by means of performing a preset digital signal processing operation on a second reception signal. The apparatus comprises an acquisition unit, a reduction unit and a first determination unit. The integrated circuit comprises a storage module, and a digital signal processing module capable of implementing the radar signal processing method and the radio signal processing method. The radio component comprises a carrier provided with an integrated circuit, and an antenna. The device comprises a device body, and a radio component provided on the device body. Since a baseline difference-frequency signal is a signal which is obtained in a non-target environment by means of performing frequency mixing on a leakage signal on the basis of a local oscillator signal and performing digital signal processing, the baseline difference-frequency signal can represent information of the leakage signal during an actual measurement process; and on the basis of the baseline difference-frequency signal, reduction processing is performed on a signal to be processed, such that the leakage signal content of the signal to be processed can be effectively reduced, the influence of the leakage signal on a measurement result is reduced, and the accuracy of the measurement result can be improved.
G01S 13/34 - Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
G01S 13/06 - Systems determining position data of a target
67.
ON-BOARD ANTENNA, RADIO DEVICE, AND ELECTRONIC APPARATUS
An on-board antenna, a radio device, and an electronic apparatus. The on-board antenna comprises a dielectric substrate, an antenna, and a metal block. The antenna is located on the dielectric substrate, projections of the metal block and the antenna on the plane where the dielectric substrate is located do not overlap, the metal block is located on the dielectric substrate in a polarization direction of the antenna, and the distance between the metal edge of the metal block on the side close to the antenna and the antenna is greater than a coupling threshold value. By using the on-board antenna, the effect of surface waves on the pattern can be suppressed to a certain degree by providing a metal block, thereby reducing jitter of the antenna pattern.
H01Q 1/38 - Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support
H01Q 21/06 - Arrays of individually energised antenna units similarly polarised and spaced apart
H01Q 1/52 - Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
G01S 7/03 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group - Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
68.
MICROSTRIP ANTENNA, ANTENNA ARRAY, RADAR, AND VEHICLE
A microstrip antenna, an antenna array, a radar, and a vehicle. The microstrip antenna comprises a dielectric layer, and a metal layer and a ground layer which are disposed on two sides of the dielectric layer. The metal layer comprises a first radiation patch and a feed portion. The length of the long side edge of the first radiation patch is determined on the basis of an operating wavelength of the microstrip antenna, and the length of the short side edge of the first radiation patch is less than the length of the long side edge. The feed portion is coupled between the central position of the long side edge of the first radiation patch and a short side edge, and the feed portion is configured to transmit a high frequency signal to the first radiation patch or to transmit a spatial radiation signal received by the first radiation patch.
An attenuation apparatus and a test system. The attenuation apparatus comprises a signal transmission channel and at least one radiation loss structure, wherein the signal transmission channel is configured to perform transmission attenuation on the energy of a transmitted signal; the radiation loss structure is arranged in the signal transmission channel; the radiation loss structure has a first operating state and a second operating state; when the radiation loss structure is in the first operating state, the radiation loss structure is configured to perform radiation attenuation on the energy of a signal transmitted by the signal transmission channel; and when the radiation loss structure is in the second operating state, the radiation loss structure is configured to perform transmission attenuation on the energy of the signal transmitted by the signal transmission channel. By means of the attenuation apparatus provided in the embodiment, an attenuation value can be effectively changed by means of a radiation loss structure; the attenuation apparatus is simple to use and is low in cost; and a greater design space can be brought to the test system.
The present application discloses a sensing system, a related apparatus, and a method for obtaining a working clock signal. The sensing system comprises at least one chip cascade branch; in the chip cascade branch, a clock integration circuit of each sensing chip integrates the received working clock signal to obtain a stable clock signal to be subjected to frequency division that has a relative high frequency, and then a frequency division circuit performs frequency division processing on said clock signal to obtain a working clock signal required by a next-stage sensing chip; in the cascade structure, a clock source only needs to satisfy the driving requirement of a first-stage sensing chip, and the working clock signal required by each of other sensing chips is provided by a previous-stage sensing chip, such that the problem that the number of sensing chips connected in series in the chip cascade branch is limited by the driving capability of the clock source is solved, and the applicability of the sensing system is widened.
H03L 7/099 - Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop - Details of the phase-locked loop concerning mainly the controlled oscillator of the loop
09 - Scientific and electric apparatus and instruments
Goods & Services
.Radar apparatus; radar machines and apparatus; electricity conduits; integrated circuits; semiconductor chips; wafers for integrated circuits; electronic components in the nature of transistors; semiconductor devices; radar apparatus, namely, millimeter radar sensor; target sensors, namely, motion sensors; electronic range sensor for measuring distance, measuring speed, measuring position, not for medical use; electric and electronic angle sensors; electronic chips for use in the manufacture of millimeter radar sensor; electronic chips for use in the manufacture of target sensors; electronic chips for use in the manufacture of range sensors; electronic chips for use in the manufacture of electric and electronic angle sensors; electronic chips for the manufacture of integrated circuits
A radar system and control method thereof is disclosed. The radar system comprises a plurality of radar units, each comprising: one or more radio frequency (RF) channels configured to receive a reflected signal and then generate an analog input signal according to the reflected signal; and a processing module connected with all the RF channels and configured to sample the analog input signal to obtain a digital signal and perform the first digital signal processing on the digital signal to obtain intermediate data, wherein when the plurality of radar units work jointly, a designated radar unit performs the second digital signal processing on the plurality of intermediate data provided by the plurality of radar units, thereby obtaining result data of the radar system.
G01S 13/87 - Combinations of radar systems, e.g. primary radar and secondary radar
G01S 7/35 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group - Details of non-pulse systems
G01S 7/03 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group - Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
74.
AUTOMATIC GAIN CONTROL METHOD, SENSOR, AND RADIO DEVICE
An automatic gain control method, sensor (700), and radio device (900); by means of using the saturation information of a test echo unit to adjust the gain coefficient of a transmitting and receiving link, it is ensured that the received signal power used for target detection is located within a rated threshold range, further improving the accuracy of sensor (700) target detection, and avoiding defects such as missed detection, false detection, and even blindness.
A method for improving target detection accuracy, a computer device, a storage medium, an integrated circuit, a radio device and an electronic device, which relate to the technical field of radar signal processing. The method for improving target detection accuracy comprises: on the basis of a received echo signal, acquiring a velocity ambiguity multiplier and target object peak value data (301); on the basis of the velocity ambiguity multiplier, compensating the target object peak value data (302); and on the basis of the compensated target object peak value data, acquiring target object data, and taking the target object data as real target object data (303). Compared with a traditional mode, the method can acquire more accurate real target object data, especially for a scene where the target object speed is too high, thus being more efficient in improving target detection accuracy.
G01S 13/58 - Velocity or trajectory determination systems; Sense-of-movement determination systems
G01S 7/28 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group - Details of pulse systems
09 - Scientific and electric apparatus and instruments
42 - Scientific, technological and industrial services, research and design
Goods & Services
Semi-conductors; wafers for integrated circuits; integrated circuits; semiconductor chips; transistors; semiconductor devices; electronic chips for use in the manufacture of millimeter radar sensor; electronic chips for use in the manufacture of target sensors; electronic chips for use in the manufacture of range sensors; electronic chips for use in the manufacture of electric and electronic angle sensors; electricity conduits; radar apparatus, namely, millimeter radar sensor; target sensors, namely, motion sensors; electronic range sensor for measuring distance, measuring speed, measuring position, not for medical use; electric and electronic angle sensors Research in the area of semiconductor processing technology; research and development of new products for others; scientific research; industrial design; computer software design; consultancy in the design and development of computer hardware
A package antenna (110) and a radar assembly package (800). The package antenna (110) comprises: a first sub-antenna (111); and a second sub-antenna (112) arranged close to the position of the first sub-antenna (111); the first sub-antenna (111) and the second sub-antenna (112) cancel the radiation field of one another in a preset area, such that the package antenna (110) implements directional radiation.
Provided are a radar system and a control method therefor. The radar system comprises a plurality of radar units, each radar unit comprising: at least one radio frequency channel, each radio frequency channel being used for generating an analog input signal according to a received signal; and a processing module, connected to the radio frequency channels, and used for sampling the analog input signal to obtain a digital signal and performing first digital signal processing on the digital signal to obtain intermediate data. When the plurality of radar units are in a joint working mode, a designated radar unit performs, in a centralized manner, second digital signal processing on the plurality pieces of intermediate data provided by the plurality of radar units, thereby obtaining result data of the radar system.
G01S 7/02 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group
G01S 7/41 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group using analysis of echo signal for target characterisation; Target signature; Target cross-section
