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公开(公告)号：US12025727B2
公开(公告)日：2024-07-02
申请号：US17127111
申请日：2020-12-18
申请人： IMEC VZW
发明人： Andre Bourdoux , Marc Bauduin
CPC分类号： G01S7/2813 , G01S13/288 , G01S13/505 , G01S13/89 , G01S7/0233 , G01S13/584
摘要： A method of radar ranging comprises transmitting a digitally-modulated signal comprising successively in time, for each sequence in a plurality N of sequences, a plurality M+1 of repeats of said sequence, wherein each said sequence consists of a plurality Lc of digitally-modulated chips, wherein at least one sequence in the plurality of sequences is different from another sequence in said plurality of sequences; receiving a version of the digitally-modulated signal reflected scattered by one or more physical targets; for each sequence in the plurality of sequences, performing a preliminary target estimation; and using each said preliminary target estimation for all sequences in the plurality of sequences, performing a final target estimation.
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公开(公告)号：US20240094331A1
公开(公告)日：2024-03-21
申请号：US17947256
申请日：2022-09-19
发明人： Andrew E. Klappert , Robert F. Saracino , Richard J. Lavery , David C. Ringlen , Robert C. Bonino
CPC分类号： G01S7/021 , G01S7/2813 , G01S7/292 , G01S7/36 , G01S13/78
摘要： Techniques are provided for dynamic performance enhancement of radio frequency (RF) based systems. A system implementing the techniques according to an embodiment includes a waveform decoder configured to perform message decoding operations on a received RF signal waveform and to provide a decoding validation result for the message decoding operations. The system also includes a waveform attribute analyzer configured to analyze physical characteristics of the received RF signal waveform and to provide an attribute validation result for the physical characteristics. The system further includes a statistics analyzer configured to generate a statistic based on the decoding validation results and the attribute validation results and a thresholding system configured to generate anomaly detection based on a comparison of the generated statistic to a threshold value. In some embodiments, the RF signal waveform is an Identification Friend or Foe (IFF) transponder waveform or an IFF interrogator waveform.
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公开(公告)号：US20240077598A1
公开(公告)日：2024-03-07
申请号：US18270145
申请日：2022-01-04
CPC分类号： G01S13/426 , G01S7/2813 , G01S15/8954
摘要： A beamforming system and method is disclosed comprising a hybrid multi-measurement unit or process that can encode or embed broadband signals in a low dimensional encoding subspace such as a Slepian subspace. The direction-of-arrival of the plane wave signals, encoded with the low dimensional embedding, can be used to provide a spatially sampled signal to a front-end mixed-signal circuitries substantially reduced hardware for beamforming systems. The beamforming array has a finite array aperture to which a temporal snapshot of the signal can be acquired and then processed as a set of samples from a time-limited bandlimited sequence.
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公开(公告)号：US20230314587A1
公开(公告)日：2023-10-05
申请号：US17801588
申请日：2022-03-18
申请人： FIONSYSTEMS, Inc.
发明人： Han Seok LEE
CPC分类号： G01S13/426 , G01S7/2813 , G01S7/282 , G01S2013/0245
摘要： Disclosed is a cylindrical array radar including: a ring array having a plurality of Tx/Rx modules arranged in a circular shape for transmitting and receiving high-frequency signals of a radar frequency band, and a ring array signal processing unit arranged at the center of the array of the Tx/Rx modules for processing signal data exchanged with the plurality of Tx/Rx modules; and a main signal processing unit that performs antenna beamforming for the plurality of Tx/Rx modules and signal processing for detecting and tracking a target. It is possible to achieve omnidirectional antenna detection without mechanical rotation and easily obtain performance change.
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公开(公告)号：US20190237871A1
公开(公告)日：2019-08-01
申请号：US16262670
申请日：2019-01-30
申请人： Sivers Ima AB
发明人： Håkan Berg
CPC分类号： H01Q3/34 , G01S7/2813 , G01S7/352 , G01S7/354 , G01S13/02 , G01S13/0209 , G01S13/34 , G01S13/42 , G01S2013/0245 , G01S2013/0254 , H01Q3/2617 , H01Q21/22 , H01Q23/00
摘要： An active electronically steerable receive antenna may comprise an antenna array that includes multiple receive antenna elements. Reflected radar signals may be received at the receive antenna elements, and received signals may be obtained from the receive antenna elements. The received signals may be processed via at least frequency down-conversion, analog-to-digital conversion, generation of digital signals, and alignment of the received signals or the digital signals for a predetermined angle of incidence. Multiple signals including a sum beamforming signal and a product beamforming may be multiplied to determine a beamformed signal. The sum beamforming signal and the product beamforming signal may be respectively determined by summing or multiplying at least two of the digital signals. The product beamforming signal may be a grating lobe suppression signal that suppresses grating lobes of the sum beamforming signal when multiplied with the sum beamforming signal.
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公开(公告)号：US20190235049A1
公开(公告)日：2019-08-01
申请号：US15883400
申请日：2018-01-30
发明人： ZENHUA LAI , FENG GUO , PEIRONG FU
CPC分类号： G01S7/2813 , G01S7/4861 , G01S7/4865 , G01S13/02 , G01S17/02
摘要： A method for determining that a received signal is crosstalk. The method includes receiving, from a time-of-flight sensor of a device, a distance and a plurality signal intensity values. The method further includes determining, by the device, whether the distance is less than a near-field threshold. The method further includes, in response to determining that the distance is less than the near-field threshold, determining whether the distance is associated with crosstalk based, at least in part, on the plurality of signal intensity values. The method further includes, in response to determining that the distance is associated with crosstalk, indicating that the distance is associated with crosstalk.
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公开(公告)号：US20180329027A1
公开(公告)日：2018-11-15
申请号：US15994465
申请日：2018-05-31
申请人： UHNDER, INC.
发明人： Aria Eshraghi , Jean P. Bordes , Curtis Davis , Raghunath K. Rao , Murtaza Ali , Paul W. Dent
CPC分类号： G01S7/023 , G01S7/038 , G01S7/2813 , G01S7/292 , G01S7/354 , G01S7/4021 , G01S13/347 , G01S13/87 , G01S13/931 , G01S2007/358 , G01S2013/9375 , G01S2013/9378
摘要： A radar system is described that comprises a transmitter and a receiver. The transmitter transmits radio signals. The receiver receives interfering signals due to local signal coupling of transmitted signals. The local signal coupling comprises at least one interfering path or mechanism. The receiver is configured to output a replica of each of the interfering signals. Each replica is configured to replicate a particular interfering signal received. The receiver is configured to combine into a signal path a replica of an interfering signal to subtract the interfering signal from the signal path. The receiver receives the transmitted radio signals transmitted by the transmitter and reflected from objects in an environment without saturating the signal path due to the subtraction of the interfering signal from the signal path.
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公开(公告)号：US20180284262A1
公开(公告)日：2018-10-04
申请号：US15936041
申请日：2018-03-26
CPC分类号： G01S13/9011 , G01S7/2813 , G01S7/295 , G01S13/90
摘要： The present disclosure relates to a method for computer-implemented processing of SAR raw data, which comprises radar echoes from radar pulse. An interference radar echo and an interference pulse are associated with a respective radar pulse, wherein the interference pulse and the respective radar pulse have orthogonal waveforms. SAR raw data are focused by a first focusing on the interference pulses including a range compression and an azimuth compression, to obtain first focused data, where a filtering is used for the range compression of a respective radar pulse, which filtering is matched to the waveform of the associated interference pulse. Thereafter, the first focused data undergo a signal suppression, which at least partially suppresses the interference radar echo, as a result of which second focused data are obtained. These second focused data finally undergo a defocusing including range decompression and azimuth decompression to obtain modified SAR raw data.
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公开(公告)号：US09851431B2
公开(公告)日：2017-12-26
申请号：US14653104
申请日：2013-12-12
申请人： BAE SYSTEMS plc
发明人： Marcus Edward Clark , Robert Wills
CPC分类号： G01S7/023 , G01S7/2813 , H01Q3/04
摘要： An antenna system (1) comprises a directional antenna (2) adapted to rotate through a range of directions in azimuth. It is responsive to radio-frequency (RF) signals received from directions within the range of directions in azimuth. A receiver (7) is arranged to receive the RF signals from the antenna within a signal frequency response band of the receiver and to provide a corresponding output for signal processing. A signal filter (11) is operable to block the output from the receiver when the frequency of the RF signal lies at a frequency within the signal frequency response band of the receiver and a detector unit (8) is arranged to apply the signal filter when the directional antenna is directed to a predetermined azimuth at which an interference source is located and to not apply the signal filter otherwise.
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公开(公告)号：US20170356988A1
公开(公告)日：2017-12-14
申请号：US15621256
申请日：2017-06-13
CPC分类号： G01S13/0209 , G01S3/043 , G01S7/023 , G01S7/2813 , G01S7/292 , G01S7/4021
摘要： A radar system including a narrowband radar receiver configured to receive pulsed radar return signals and a wideband receiver configured for receiving wideband signals. A noise data processor is configured to identify impulse noises by analyzing wideband signals received by the wideband receiver and a radar processor is configured to cancel the identified impulse noises from pulse signals received by the radar receiver. The wideband impulse noises utilized to cancel noise from the pulse signals corresponds to the same time period sweep of detection as that of the pulse signals.
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