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公开(公告)号：US20240377504A1
公开(公告)日：2024-11-14
申请号：US18316619
申请日：2023-05-12
Applicant: NXP B.V.
Inventor： Feike Guus Jansen
Abstract: A system includes first and second radar transceivers, a processor, and a non-transitory computer-readable medium storing machine instructions. The machine instructions cause the processor to determine a first frequency offset a1 and a first initial time offset τinitial;1 between a first clock signal for the first radar transceiver and a reference clock for the processor, and the processor determines a first clock drift for the first clock signal relative to the reference clock based on the frequency offset a1 and the time offset τinitial;1. The processor determines a second frequency offset a2 and a second initial time offset τinitial;2 between a second clock signal for the second radar transceiver and the reference clock, and a second clock drift for the second clock signal relative to the reference clock based on the frequency offset a2 and the time offset τinitial;2. The processor then compensates for the first and second clock drift.
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公开(公告)号：US20230305104A1
公开(公告)日：2023-09-28
申请号：US18182763
申请日：2023-03-13
Applicant: NXP B.V.
Inventor： Andries Pieter Hekstra , Alessio Filippi , Arie Geert Cornelis Koppelaar , Ryan Haoyun Wu , Dongyin Ren , Feike Guus Jansen , Jeroen Overdevest , Joerg Heinrich Walter Wenzel
CPC classification number: G01S7/354 , G01S13/584 , G01S7/356
Abstract: A radar receiver comprising: an ADC (510) that samples analogue intermediate frequency, IF, signalling in order to generate digital signalling, wherein the digital signalling comprises a plurality of digital-values; a digital processor that populates a 2-dimensional array of bin-values based on the digital-values, such that: a first axis of the 2-dimensional array is a fast time axis and a second axis of the 2-dimensional array is a slow time axis; and a sampling-rate-adjuster that is configured to set a sampling rate associated with the bin-values in the 2-dimensional array based on an index of the slow time axis. The digital processor also performs DFT calculations on the bin-values in the 2-dimensional array along the fast time axis and the slow time axis in order to determine the range and velocity of any detected objects.
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公开(公告)号：US20210018592A1
公开(公告)日：2021-01-21
申请号：US16512988
申请日：2019-07-16
Applicant: NXP B.V.
Inventor： Francesco Laghezza , Feike Guus Jansen
Abstract: A mechanism is provided to determine if a short-range automotive radar detection is a direct reflection or an indirect (also known as “multipath”) reflection from a physical target object. The multipath information is further used to perform a height estimation of the object. Embodiments provide a radar system having a range resolution smaller than a path difference between the direct reflection path and the indirect reflection path. Both range separation techniques and Doppler separation techniques are utilized to provide a reliable and accurate estimation of the height of the object.
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公开(公告)号：US10768276B2
公开(公告)日：2020-09-08
申请号：US15706999
申请日：2017-09-18
Applicant: NXP B.V.
Inventor： Feike Guus Jansen
Abstract: There is provided a radar sensor and method. The radar sensor comprises a plurality of transmit and receive antennas, a transceiver, a digital signal processor, a filter and an interface. The transceiver is configured to digitize received radar signals to provide a plurality of digital samples. The digital signal processor is configured to form a measurement matrix by transforming the plurality of digital samples into a distance/relative velocity matrix for each combination of the transmit and receive antennas. The filter is configured to identify samples forming the measurement matrix having a signal to noise ratio higher than a threshold value. The interface is configured to transmit the identified samples and their location in the measurement matrix to a remote host processor configured to further carry out direction of arrival processing on the identified samples.
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5.发明公开公开(公告)号：US20230160997A1
公开(公告)日：2023-05-25
申请号：US17533906
申请日：2021-11-23
Applicant: NXP B.V.
Inventor： Ryan Haoyun Wu , Feike Guus Jansen , Michael Andreas Staudenmaier , Maik Brett
IPC: G01S7/02 , G01S13/931 , G01S7/40 , G01S7/4865
CPC classification number: G01S7/023 , G01S13/931 , G01S7/4026 , G01S7/4865
Abstract: Described are method and systems that implement time frequency domain threshold interference and localization fusion to resolve interference issues in an automotive radar system, that produces spectrograms using Short-Time Fourier Transform (STFT) for all receiving antennas of the automotive radar system. For each STFT frequency a suppression threshold is determined. Interference is isolated for each STFT frequency by removing the interference from samples that are above the suppression threshold by using a filter. Direction of Arrival (DoA) is estimated for each interference spectrogram cell using measurements from all the receiving antennas. Interference samples are clustered using the DoA into epochs of chirps.
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Patent Agency Ranking
公开(公告)号：US20230152435A1
公开(公告)日：2023-05-18
申请号：US17818016
申请日：2022-08-08
Applicant: NXP B.V.
Inventor： Arie Geert Cornelis Koppelaar , Marco Jan Gerrit Bekooij , Francesco Laghezza , Feike Guus Jansen , Yiting Lu
CPC classification number: G01S13/34 , G06F1/03 , G06F17/156
Abstract: An apparatus configured to receive an input dataset, x, indicative of radar signals reflected from targets as received at a plurality of antenna elements; define a matrix, A, formed of direction-of-arrival-angle vectors, an, each direction-of-arrival-angle vector representing an expected response at the plurality of antenna elements of radar signals from one of the targets; define a signal amplitude vector s to represent expected complex amplitudes as received in the radar signals; define an objective function based on x, A and s; search for a set of direction of arrival angles for each of the plurality of targets by the repeated evaluation of the objective function for a plurality of candidate matrices based on matrix A; and wherein said search space comprises a plurality of discrete points, z, associated with the direction of arrival angles by a function of sin(θk).
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公开(公告)号：US20210396840A1
公开(公告)日：2021-12-23
申请号：US16906655
申请日：2020-06-19
Applicant: NXP B.V.
Inventor： Marco Jan Gerrit Bekooij , Feike Guus Jansen
Abstract: Exemplary aspects are directed to or involve a radar transceiver to transmit signal and receive reflected radar signals via a communication channel. The exemplary method includes radar receiver data processing circuitry that may be used to differentiate a subset of representations of the received signals. This differentiation may be used to select signals that are more indicative of target(s) having a given range than other ones of the received signals. The received signal's representations may then be compressed by using variable-mantissa floating-point numbers having mantissa values that vary based, at least in part, on at least one strength characteristic of the respective representations.
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公开(公告)号：US09541638B2
公开(公告)日：2017-01-10
申请号：US14538541
申请日：2014-11-11
Applicant: NXP B.V.
Inventor： Feike Guus Jansen , Alessio Filippi , Zoran Zivkovic
CPC classification number: G01S13/42 , G01S7/02 , G01S7/28 , G01S13/343 , G01S13/582 , G01S13/584 , G01S13/878 , G01S2007/356
Abstract: Various exemplary embodiments relate to a method for detecting an object using radar system having M transmit antennas, N receive antennas, and a processor, including: receiving, by the processor, N×M digital signals, wherein the N receivers receive M received signals corresponding to M sequences of encoded transmitted signals resulting in N×M digital signals; processing the N×M digital signals to produce N×M first range/relative velocity matrices; applying a phase compensation to N×(M−1) first range/relative velocity matrices to compensate for a difference in range between the N×(M−1) first range/relative velocity matrices and the Mth range/velocity matrix; decoding the M phase compensated range/relative velocity matrices for the N receivers using an inverse of the transmit encoding to produce M decoded phase range/relative velocity matrices for the N receivers; detecting objects using the M range/relative velocity matrices for the N receivers to produce a detection vector.
Abstract translation: 各种示例性实施例涉及使用具有M个发射天线，N个接收天线和处理器的雷达系统来检测对象的方法，包括：由处理器接收N×M个数字信号，其中N个接收机接收对应于M个接收信号的M个接收信号 到编码的发送信号的M个序列，得到N×M个数字信号; 处理N×M数字信号以产生N×M个第一范围/相对速度矩阵; 对N×（M-1）个第一范围/相对速度矩阵施加相位补偿以补偿N×（M-1）个第一范围/相对速度矩阵与第M个范围/速度矩阵之间的范围差; 使用发射编码的逆来解码N个接收机的M相补偿范围/相对速度矩阵，以产生用于N个接收机的M个解码的相位范围/相对速度矩阵; 使用M个范围/相对速度矩阵来检测物体，以产生检测向量。
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公开(公告)号：US12019141B2
公开(公告)日：2024-06-25
申请号：US17451515
申请日：2021-10-20
Applicant: NXP B.V.
IPC: G01S13/532 , G01S7/288 , G01S7/40 , G01S13/58 , G01S13/87 , G01S13/931
CPC classification number: G01S13/532 , G01S7/2883 , G01S7/40 , G01S13/584 , G01S7/4004 , G01S13/878 , G01S2013/93271
Abstract: A radar processor for processing a frame of radar data received from one or more targets, the frame of radar data having a carrier frequency and comprising a sequence of codewords with a codeword repetition interval, wherein the carrier frequency and the codeword repetition interval define an unambiguous velocity range, the radar processor configured to: receive the frame of radar data; transform the frame to obtain a velocity data array; apply a correction algorithm to the velocity data array to correct a Doppler shift of the frame to obtain a corrected array, wherein the correction algorithm comprises a set of Doppler correction frequencies corresponding to a set of velocity gates and at least one of the set of Doppler correction frequencies corresponds to a velocity gate outside the unambiguous velocity range; and perform range processing on the corrected array to obtain a range-Doppler map.
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公开(公告)号：US11815589B2
公开(公告)日：2023-11-14
申请号：US17006503
申请日：2020-08-28
Applicant: NXP B.V.
Inventor： Feike Guus Jansen , Francesco Laghezza , Saif Alhasson
IPC: G01S13/34 , G01S13/931 , H04B1/00 , H04B1/18 , H04B1/38
CPC classification number: G01S13/34 , G01S13/931 , H04B1/0064 , H04B1/18 , H04B1/38 , G01S2013/93271 , G01S2013/93275
Abstract: In imaging radar, examples are directed to uses of multiple sets of transmit antenna included with transceiver circuitry, for transmitting in a plurality of modes. Transmissions may involve having at least one transmit antenna, from each of at least two of the multiple sets, to transmit continuous-wave energy concurrently (simultaneously) in one or more of the plurality of different modes. Transceiver circuitry may include multiple receive antennas which may be receiving reflections of the continuous-wave energy from various targets. Signals from the multiple receive antennas may route to signal processing circuitry. The signal processing circuitry may respond to the received reflections of the continuous-wave energy by assessing differences in antenna gain and/or phase due to transmit antenna position associated with the received reflections. This signal processing assessment may mitigate or resolve at least one spatial ambiguity in at least one direction of arrival dimension associated with the received reflections.
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