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1.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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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：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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Patent Agency Ranking
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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公开(公告)号：US12123966B2
公开(公告)日：2024-10-22
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 , G01S7/40 , G01S7/4865 , G01S13/931
CPC classification number: G01S7/023 , G01S7/4026 , G01S7/4865 , G01S13/931
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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公开(公告)号：US20230280447A1
公开(公告)日：2023-09-07
申请号：US18174279
申请日：2023-02-24
Applicant: NXP B.V.
Inventor： Francesco Laghezza , Feike Guus Jansen
CPC classification number: G01S7/354 , G01S13/584 , G01S13/931
Abstract: In accordance with a first aspect of the present disclosure, a radar system is provided, comprising: a plurality of receive channels; a first radar detector stage configured to detect, through said receive channels, at least one target using a detector threshold; a noise correlation determination unit configured to determine a noise correlation level indicative of noise correlation between the receive channels if the first radar detector stage has detected the target; a detector threshold adjustment unit configured to adjust the detector threshold in dependence on the noise correlation level determined by the noise correlation determination unit; a second radar detector stage configured to detect the target using the adjusted detector threshold. In accordance with a second aspect of the present disclosure, a corresponding method of operating a radar system is conceived.
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