Signal processing technology of spectrum-analyzing laser Doppler velocimeter

In order to enhance the accuracy of laser Doppler velocimeter, the method to track the laser Doppler signal and correct the frequency spectrum with frequency spectrum refinement and frequency spectrum correction method was put forward. The Doppler signal was studied by signal processing system. The results showed that the background signal and part of the noise were got rid of, signal-to-noise ratio was raised, and Doppler frequency was tracked so that the result agreed with the actual value and that the distinguishability of frequency spectrum was improved by frequency spectrum refinement algorithm and the corrected frequency agreed well with the actual value by frequency spectrum correction algorithm.