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Patent Agency Ranking
1.发明申请公开(公告)号：US20220283283A1
公开(公告)日：2022-09-08
申请号：US17190222
申请日：2021-03-02
Applicant: NXP B.V.
Inventor： Arie Geert Cornelis Koppelaar , Yiting Lu , Francesco Laghezza , Feike Guus Jansen
IPC: G01S13/44
Abstract: A mechanism is provided for determining an unambiguous direction of arrival (DoA) for radio frequency (RF) signals received by a sparse array. A DoA angle domain is split into hypothesis regions. The hypothesis regions are derived from the phase differences of the antenna element pairs used for the DoA angle estimate. In each hypothesis region, the ambiguous phase of antenna element pairs is unwrapped according to expected wrap-around. After unwrapping the phase, for each hypothesis region, a phasor is calculated by combining the individual antenna element pair phasors. The hypothesis region that obtains the phasor with a largest amplitude is selected as the most likely DoA region and the phase of the winning phasor is used as an unambiguous estimate for the DoA angle.
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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：US20240142617A1
公开(公告)日：2024-05-02
申请号：US18479861
申请日：2023-10-03
Applicant: NXP B.V.
Inventor： Yiting Lu , Arie Geert Cornelis Koppelaar , Marco Jan Gerrit Bekooij
Abstract: An apparatus comprising a processor configured to receive an input dataset of radar signals received at a plurality of antenna elements that are arranged in a first plane; define a matrix of beamsteering vectors each representing an expected response at the antenna elements of the radar signals from the respective target and comprising a function of a first direction of arrival, DoA, angle θ, relative to the plurality of antenna elements, and a second DoA angle Φ, wherein the first DoA angle comprises a function of an elevation angle and the second DoA angle comprises an azimuth angle to the respective target, wherein the azimuth angle lies in a second plane that is arranged perpendicular to the first plane; define an objective function; search for a set of the first and second DoA angles for each of the plurality of targets by the repeated evaluation of the objective function.
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公开(公告)号：US20240385286A1
公开(公告)日：2024-11-21
申请号：US18318792
申请日：2023-05-17
Applicant: NXP B.V.
Inventor： Tarik Kazaz , Karan Jayachandra , Arie Geert Cornelis Koppelaar , Yiting Lu
Abstract: A non-transitory computer-readable medium stores machine instructions that cause a processor to obtain a range-sample-antenna data cube for a received radar signal comprising reflections of a plurality of interleaved chirp sequences. The processor generates, for each chirp sequence, a Hankel matrix based on subset of range bins for the particular chirp sequence, and generates a block Hankel matrix based on the Hankel matrices for the plurality of interleaved chirp sequences. The processor performs truncated singular value decomposition to estimate subspaces, and object detection to identify selection matrices. The processor calculates least-squares approximations for the selection matrices and the block Hankel matrix to obtain, for each chirp sequence, a first phase shift matrix θ11 and a second set of phase shift matrices θ1l, l=2, . . . , L. The processor performs joint diagonalization and Doppler division multiplexing compensation on θ11 and θ1l, l=2, . . . , L, then resolves ambiguities in determined velocities based on comparison of θ11 and θ1l, l=2, . . . , L.
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5.发明授权公开(公告)号：US11573312B2
公开(公告)日：2023-02-07
申请号：US17190222
申请日：2021-03-02
Applicant: NXP B.V.
Inventor： Arie Geert Cornelis Koppelaar , Yiting Lu , Francesco Laghezza , Feike Guus Jansen
IPC: G01S13/44
Abstract: A mechanism is provided for determining an unambiguous direction of arrival (DoA) for radio frequency (RF) signals received by a sparse array. A DoA angle domain is split into hypothesis regions. The hypothesis regions are derived from the phase differences of the antenna element pairs used for the DoA angle estimate. In each hypothesis region, the ambiguous phase of antenna element pairs is unwrapped according to expected wrap-around. After unwrapping the phase, for each hypothesis region, a phasor is calculated by combining the individual antenna element pair phasors. The hypothesis region that obtains the phasor with a largest amplitude is selected as the most likely DoA region and the phase of the winning phasor is used as an unambiguous estimate for the DoA angle.
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