- 专利标题: Radar System to Universally Detect Direction-of-Arrival or Direction-of-Departure Angles in Direct-Path and Multipath Reflection Conditions
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申请号: US18176295申请日: 2023-02-28
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公开(公告)号: US20240288562A1公开(公告)日: 2024-08-29
- 发明人: Xin Zhang , Zhengzheng Li , Yu Zhang
- 申请人: Aptiv Technologies Limited
- 申请人地址: BB St. Michael
- 专利权人: Aptiv Technologies Limited
- 当前专利权人: Aptiv Technologies Limited
- 当前专利权人地址: BB St. Michael
- 主分类号: G01S13/00
- IPC分类号: G01S13/00 ; G01S13/68 ; G01S13/931
摘要:
This document describes a radar system to universally detect direct-of-arrival (DoA) and direction-of-departure (DoD) angles in direct-path and multipath reflection conditions. For example, a radar system includes a transmitter and receiver array with a first array forming a minimum redundancy array and a second array forming a sparse uniform linear array. A processor determines, using second-array measurements, estimated angles. The quantity of estimated angles is larger than the quantity of actual angles due to angular ambiguity of the second array. The processor then identifies multiple potential sets of actual angles from among the estimated angles and tests each set under a maximum likelihood criterion using first-array measurements. The DoA and DoD angles are identified as the respective set with a maximum utility function value. In this way, the processor determines actual angles with improved resolution and reduced cost without having to identify whether a direct-path or multipath reflection condition exists.
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