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

IPC: G01S7/35 ,  G01S13/58

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.