Method and Apparatus for Increasing Angular Resolution in an Automotive Radar System

摘要

Described herein is an automotive radar system and related processing techniques utilizing a three channel switched antenna to improve the angular resolution of an azimuth tracking radar.

主权项

1. An automotive radar system comprising:
three or more receive antennas; a radio frequency (RF) switch having a three or more input ports coupled to respective ones of the receive antennas, and an output port; a single-channel RF receiver having an input port coupled to the output of the RF switch to selectively receive RF signals from the receive antennas, and having an output port; and a single-channel intermediate frequency (IF) receiver having an input port coupled to the output port of the RF receiver, wherein the IF receiver is configured to, in response to transmitted chirps reflected off a target, receive interleaved chirp return signals from the receive antennas and to determine an azimuth angle to the target and a Doppler velocity of the target using the interleaved chirp return signals.