Verification of low SNR inversion algorithm by dual-channel LiDAR
Aiming at the problem that it is difficult to verify the reliability and precision of the inversion algorithm of coherent wind LiDAR in low signal-to-noise ratio(SNR),a dual-channel pulsed coherent wind LiDAR system is built,which can achieve two groups of data of high and low SNR at the same time.The results of high SNR channel are taken as the true value to compare and use the results of vector wind speed estimation of different algorithm in low SNR channel.This system avoids problems of difficulty of registration or disunity of targets observation when taking other observation devices as ture values.The validity of each algonith is verified by the LiDAR observation results.The horizontal contrast are carried out between algorithms.Based on the performance and computational complexity of each algorithm,the advantages usage scenarios are identified.It is significant for making full use of existing systems,employing new algorithm to improve data acquisition efficiency in low SNR or reducing hardware requirements such as laser energy and realizing system miniaturization under certain detection specifications.
pulsed coherent wind LiDARdual-channelvector wind speed estimationlow signal-to-noise ratio