US 11,994,617 B2
Frequency modulated continuous wave (FMCW) radar target emulation with synchronized modulation reflection devices
Dietrich W. Vook, Santa Clara, CA (US); Todd Steven Marshall, Los Gatos, CA (US); Jefferson B. Burch, Palo Alto, CA (US); and Gregory S. Lee, Mountain View, CA (US)
Assigned to KEYSIGHT TECHNOLOGIES, INC., Santa Rosa, CA (US)
Filed by Keysight Technologies, Inc., Santa Rosa, CA (US)
Filed on Jun. 16, 2021, as Appl. No. 17/349,678.
Application 17/349,678 is a continuation in part of application No. 17/113,465, filed on Dec. 7, 2020, granted, now 11,686,814.
Prior Publication US 2022/0179044 A1, Jun. 9, 2022
Int. Cl. G01S 7/40 (2006.01); G01S 13/00 (2006.01)
CPC G01S 7/4056 (2013.01) [G01S 7/40 (2013.01); G01S 7/4069 (2021.05)] 12 Claims
OG exemplary drawing
 
7. A system for testing a vehicular radar that emits radar chirps at random time intervals, comprising:
a controller comprising a memory that stores instructions, and a processor that executes the instructions, wherein the controller is configured to execute a three-dimensional (3D) scenario simulation configured to generate drive scenarios including targets in a surrounding environment of the vehicular radar; and
a target emulator configured to transmit an emulated radar reflection signal to the vehicular radar corresponding to a target moving at a relative velocity to the radar,
wherein the target emulator includes a radar detector configured to detect each radar chirp emitted by the radar, and an emulation transmitter configured to generate the emulated radar reflection signal of a target being emulated in response to each radar chirp,
wherein the processor is configured to generate control signals at intervals corresponding to the random time intervals at which the radar chirps are emitted by the radar, each control signal controlling the emulation transmitter to generate a radar reflection signal, and
wherein a relative phase of the control signals is adjusted according to a duration of each of the random time intervals between successive radar chirps and a magnitude and sign of the relative velocity of the target.