US 12,313,775 B2
Techniques to use power spectrum density in coherent LiDAR systems
Jose Krause Perin, Mountain View, CA (US); Mina Rezk, Haymarket, VA (US); Kumar Bhargav Viswanatha, Santa Clara, CA (US); and Rajendra Tushar Moorti, Mountain View, CA (US)
Assigned to AEVA, INC., Mountain View, CA (US)
Filed by AEVA, INC., Mountain View, CA (US)
Filed on May 13, 2024, as Appl. No. 18/662,246.
Application 18/662,246 is a continuation of application No. 17/842,549, filed on Jun. 16, 2022, granted, now 11,982,762.
Application 17/842,549 is a continuation of application No. 17/503,076, filed on Oct. 15, 2021, granted, now 11,366,200, issued on Jun. 21, 2022.
Claims priority of provisional application 63/093,599, filed on Oct. 19, 2020.
Prior Publication US 2024/0295632 A1, Sep. 5, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G01S 7/48 (2006.01); G01S 7/481 (2006.01); G01S 17/08 (2006.01); G01S 17/32 (2020.01); G01S 17/58 (2006.01)
CPC G01S 7/4808 (2013.01) [G01S 7/4817 (2013.01); G01S 17/08 (2013.01); G01S 17/32 (2013.01); G01S 17/58 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method of determining range and velocity information of a target in a light detection and ranging (LiDAR) system, comprising:
determining a plurality of signal power density spectrums in a frequency domain based on an optical signal returned from a target, wherein a number of the plurality of signal power density spectrums is determined based on an expected mirror Doppler shift associated with the optical signal returned from the target;
averaging the plurality of signal power density spectrums to generate a compensated signal power density spectrum; and
detecting a peak value in the compensated signal power density spectrum to determine range and velocity information related to a target based on a corresponding frequency of the peak value of compensated signal power density spectrum.