US 11,740,345 B2
Dithering FMCW radar parameters to mitigate spurious signals
Shankar Ram Narayana Moorthy, Bangalore (IN); Karthik Subburaj, Bangalore (IN); and Anil KV Kumar, Bangalore (IN)
Assigned to Texas Instruments Incorporated, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Mar. 6, 2019, as Appl. No. 16/294,764.
Prior Publication US 2020/0284874 A1, Sep. 10, 2020
Int. Cl. G01S 13/58 (2006.01); G01S 13/34 (2006.01); G01S 7/35 (2006.01); G01S 7/02 (2006.01)
CPC G01S 13/343 (2013.01) [G01S 7/023 (2013.01); G01S 7/0234 (2021.05); G01S 7/0235 (2021.05); G01S 7/354 (2013.01); G01S 13/584 (2013.01); G01S 7/356 (2021.05)] 18 Claims
OG exemplary drawing
 
1. A method for a radar system, the method comprising:
transmitting, by a transmit channel of the radar system, a frame comprising first, second, and third chirps, each chirp having a chirp start frequency, wherein the chirp start frequency of the transmitted chirps is dithered;
receiving, by a receive channel of the radar system, a frame of reflected chirps based on the transmitted frame;
generating a digital intermediate frequency (IF) signal; and
dithering sampling window start times of the reflected chirps such that a time duration between sampling window start times of a first reflected chirp and a second reflected chirp is within ten percent of a time duration between sampling window start times of the second reflected chirp and a third reflected chirp.