公开(公告)号：US20230018183A1

公开(公告)日：2023-01-19

申请号：US17503212

申请日：2021-10-15

Applicant: Aptiv Technologies Limited

Inventor： Le Zheng ,  Yu Zhang ,  Edgar Ortiz ,  Clinton Colby

IPC: G01S13/90 ,  G06T5/00 ,  G06T5/20 ,  B60W50/06

Abstract: This document describes techniques for enabling de-aliased imaging for a synthetic aperture radar. Radar signals processed by a synthetic aperture radar (SAR) system may include false detections in the form of aliasing induced by grating lobes. The techniques described herein can reduce the adverse effects of grating lobes by obtaining an initial SAR image using a back-projection algorithm. Aliasing effects (e.g., false detections) in this initial image may be common due to the limitations of an SAR system moving at non-uniform speeds. A refined image is produced from the initial image by applying a de-aliasing filter to the initial image. The refined image may have reduced or eliminated false detections that attribute to aliasing effects, resulting in a better representation of the environment of the vehicle.