公开(公告)号：US20230384440A1

公开(公告)日：2023-11-30

申请号：US17929602

申请日：2022-09-02

申请人： Aptiv Technologies Limited

发明人： Xiuzhang Cai ,  Baokun Liu

IPC分类号： G01S13/68 ,  G01S13/931

CPC分类号： G01S13/68 ,  G01S13/931

摘要： This document describes techniques and systems for super-resolution based on iterative multiple-source angle-of-arrival estimation. Beam vectors received by an electromagnetic sensor may include information about multiple objects, but if the objects are close, the objects may initially appear as a single object in a Doppler-range bin. Performing iterative operations on a first angle derived from the beam vector and a subsequent second angle, associated with a second object, derived from the first angle, the first angle and the second angle may be refined and converge toward their actual respective values. The iterative operations include performing calculations involving only the first angle value and the second angle value as unknowns. Noise has been approximated to be random Gaussian noise with zero mean. Additionally, phase ambiguity, associated with sparse channel arrays has been eliminated. The calculations may require less computational complexity and maintain accuracy resulting in safer and reliable tracking systems.

公开(公告)号：US20220404455A1

公开(公告)日：2022-12-22

申请号：US17479363

申请日：2021-09-20

申请人： Aptiv Technologies Limited

发明人： Baokun Liu ,  James Fredrick Searcy ,  Benjamin Dilsaver

IPC分类号： G01S7/02 ,  G01S7/292 ,  G01S7/40 ,  G01S13/66 ,  G01S13/931

摘要： This document describes techniques, apparatuses, and systems for radar interference mitigation using signal pattern matching. Radar signals (e.g., chirps) received by a radar system may include interference from other nearby radar systems. The interference can result in reduced sensitivity of the radar system. The techniques, apparatuses, and systems described herein mitigate the interference by selecting an uncorrupted segment of the radar signal that neighbors a corrupted segment, analyzing the radar signal to identify a match segment that has similar signal characteristics to the neighbor segment, and replacing the corrupted segment with a segment that is adjacent to the match segment. In this manner, a noise floor of the radar system may be lowered, leading to increased sensitivity.