公开(公告)号：US20230305111A1

公开(公告)日：2023-09-28

申请号：US17702695

申请日：2022-03-23

Applicant: NXP B.V.

Inventor： Jihwan Youn ,  Satish Ravindran ,  Ruud van Sloun ,  Ryan Haoyun Wu ,  Jun Li

IPC: G01S7/41 ,  G06N3/04 ,  G01S3/14

CPC classification number: G01S7/417 ,  G06N3/0481 ,  G01S3/143 ,  G01S7/415 ,  G01S2013/0245

Abstract: Embodiments of systems and methods for estimating direction of arrival are disclosed. A device includes a signal processing unit that includes processing circuitry and memory coupled to the processing circuitry, where the processing circuitry includes multiple vector processing units, each vector processing unit configured to receive an antenna input vector, receive an angular spectrum vector, retrieve a first and second weighting vectors from the memory, generate a processed antenna input vector by performing a circular convolution of the antenna input vector with the first weighting vector, generate a processed angular spectrum vector by performing a circular convolution of the angular spectrum vector with the second weighting vector, and generate a refined angular spectrum vector, which indicates angular position of one or more radar targets, by applying a non-linear activation function to a sum of the processed antenna input vector and the processed angular spectrum vector.