US 12,066,566 B2
Interference detection in a frequency modulated continuous wave (FMCW) radar system
Brian Paul Ginsburg, Allen, TX (US); Karthik Subburaj, Bangalore (IN); Karthik Ramasubramanian, Bangalore (IN); Sachin Bhardwaj, Bangalore (IN); Sriram Murali, Bangalore (IN); and Sandeep Rao, Bangalore (IN)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by Texas Instruments Incorporated, Dallas, TX (US)
Filed on Aug. 31, 2021, as Appl. No. 17/462,086.
Application 17/462,086 is a continuation of application No. 16/120,129, filed on Aug. 31, 2018, granted, now 11,137,476.
Application 16/120,129 is a continuation of application No. 14/679,461, filed on Apr. 6, 2015, granted, now 10,067,221, issued on Sep. 4, 2018.
Prior Publication US 2021/0389418 A1, Dec. 16, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G01S 7/35 (2006.01); G01S 7/02 (2006.01); G01S 7/40 (2006.01); G01S 13/32 (2006.01); G01S 13/931 (2020.01)
CPC G01S 7/352 (2013.01) [G01S 7/023 (2013.01); G01S 7/40 (2013.01); G01S 13/32 (2013.01); G01S 13/931 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A radar system comprising:
transmitter circuitry configured to transmit a chirp;
receiver circuitry configured to:
receive a radar reflection based on the transmitted chirp; and
generate a digital intermediate frequency (IF) signal based on the received radar reflection; and
interference monitoring circuitry coupled to the receiver circuitry and configured to:
receive the digital IF signal;
extract at least one sub-band in the digital IF signal; and
detect energy over time in the at least one sub-band in the digital IF signal to determine whether or not interference is present in the at least one sub-band.