CPC G01S 17/18 (2020.01) [G01S 17/931 (2020.01); G01S 7/4861 (2013.01)] | 20 Claims |
1. A range estimation system for an optical sensing system, comprising:
an analog to digital converter (ADC) configured to convert a plurality of laser pulses of an identical waveform returned from an object to a digital signal, wherein the ADC has a predetermined sampling period; and
a processor, configured to:
calculate an intensity ratio between two data points selected from the digital signal, wherein the two data points are from two different laser pulses;
determine an arrival time of a first returned laser pulse based on the intensity ratio; and
estimate a range between the object and the optical sensing system based on the arrival time of the first returned laser pulse.
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