Implementation of Complex Autocorrelation Algorithm to Process Pseudo-Random Phase Modulation Signal

This Paper analyzes and researches the acoustic Doppler flow measurement technology, mainly based on the resolution theory to analyze the applicability of different signal forms in Doppler flow measurement, determine the transmit signal form and process the received echo signal, and use the complex autocorrelation algorithm for frequency estimation. The complex autocorrelation algorithm based on the idea of time-domain phase can reduce the computational effort of the frequency domain estimator and achieve fast and flexible measurement requirements on the basis of ensuring the velocity measurement performance of the flow estimator.