Phase-coded unsaturated modulation method, apparatus, lidar distance and velocity measurement method and lidar system
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United States of America
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Jun 30, 2022
app pub date -
Mar 16, 2022
filing date -
Mar 16, 2022
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Abstract
The present invention relates to a phase coded unsaturated modulation method and apparatus, distance and velocity measurement method using lidar and lidar system, by using phase-unsaturated modulation, a modulated laser signal includes both a single-frequency component and a phase-modulated component with the same or close energy ratio, wherein the single-frequency component can be used to obtain the velocity of relative motion between the platform and the target and to compensate for the frequency drift of a seed laser, the obtained relative Doppler frequency is used to construct a matched filter function to perform pulse compression of the phase-coded signal, and further to obtain the distance information between the target and the platform. The invention can simultaneously complete distance and velocity measurement with high accuracy, low error, small calculations and low system complexity.
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