US 11,988,770 B2
Phase-modulated continuous wave radar receiver with time division quadrature sampling
Stephen Crouch, Bozeman, MT (US); and Chunshu Li, San Jose, CA (US)
Assigned to AURORA OPERATIONS, INC., Mountain View, CA (US)
Filed by Aurora Operations, Inc., Mountain View, CA (US)
Filed on Mar. 2, 2022, as Appl. No. 17/684,952.
Application 17/684,952 is a continuation of application No. 17/332,101, filed on May 27, 2021, granted, now 11,320,516.
Prior Publication US 2022/0381878 A1, Dec. 1, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G01S 7/35 (2006.01); G01S 13/36 (2006.01); G01S 13/58 (2006.01); G01S 13/931 (2020.01)
CPC G01S 7/358 (2021.05) [G01S 13/36 (2013.01); G01S 13/583 (2013.01); G01S 13/931 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A radar system for a vehicle, the radar system comprising:
a modulator circuit that is configured to selectively modulate a feature of a local oscillator (LO) signal to generate a selectively modulated LO signal;
a radar transceiver circuit that is configured to generate an output radar signal using the selectively modulated LO signal and that is configured to receive an input radar signal; and
a sampling circuit that is coupled to the radar transceiver circuit and configured to determine a first component and a second component of the input radar signal by mixing the input radar signal with the selectively modulated LO signal;
wherein the sampling circuit is configured to determine the first and second components of the input radar signal by alternating between sampling the first and second components of the input radar signal over time, and wherein the sampling circuit is configured to alternate between sampling the first and second components of the input radar signal over time by alternating between sampling the first and second components of the input radar signal based upon a pseudorandom binary sequence.