CPC G01S 17/34 (2020.01) [G01S 7/4808 (2013.01); G01S 17/89 (2013.01)] | 20 Claims |
1. A method comprising:
emitting a frequency-modulated continuous light beam that, over time, includes an up region, a down region, and a flat region, wherein the up region includes increasing a frequency of the continuous light beam, the down region includes decreasing the frequency of the continuous light beam, and the flat region includes maintaining the frequency of the continuous light beam at a constant frequency;
detecting backscattered light;
determining a magnitude of a Doppler frequency shift based only on the detected backscattered light responsive to the flat region and not based on the detected backscattered light responsive to the up region and the down region; and
determining, based at least in part on the determined magnitude of the Doppler frequency shift, a velocity of a target.
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