US 11,841,466 B2
Systems and methods for detecting an electromagnetic signal in a constant interference environment
Pravin Kumar Venkatesan, Fremont, CA (US); Roger Jullian Pinto, Alameda, CA (US); Jianghui Su, San Jose, CA (US); and Abhilash Goyal, Fremont, CA (US)
Assigned to Velodyne Lidar USA, Inc., San Jose, CA (US)
Filed by VELODYNE LIDAR USA, INC., San Jose, CA (US)
Filed on Nov. 7, 2022, as Appl. No. 17/982,404.
Application 17/982,404 is a continuation of application No. 16/128,373, filed on Sep. 11, 2018, granted, now 11,493,615.
Prior Publication US 2023/0236298 A1, Jul. 27, 2023
Int. Cl. G01S 7/487 (2006.01); G01S 17/10 (2020.01); G01S 7/10 (2006.01)
CPC G01S 7/4873 (2013.01) [G01S 7/4876 (2013.01); G01S 7/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
receiving, at a detector of a lidar receiver, a first light signal;
generating, by the lidar receiver, a first electromagnetic signal corresponding to the first light signal;
determining, by the lidar receiver, whether a direct current (DC) value of the first electromagnetic signal exceeds an adjustable threshold value for at least an adjustable period of time, wherein the adjustable threshold value is based on a DC value of a second, previously generated electromagnetic signal corresponding to a second, previously received light signal; and
based on determining that the DC value of the first electromagnetic signal exceeds the adjustable threshold value for at least the adjustable period of time, categorizing the first electromagnetic signal as an invalid signal without generating distance data based on the first electromagnetic signal.