MPSK signal code rate estimation based on product CWT with multi-scales

An estimating method for MPSK signal code rate estimation based on product multi-scale wavelet transform(WT) was proposed. Firstly, the estimated value of carrier frequency was used to take the received signals down-conversion to baseband, then the phase singularities were detected through transforming baseband signal into Haar WT in several different scales. The product modulus of WT could extract singularities and weaken noise significantly. Finally, the FFT of the product result could estimate the symbol rate of MPSK signal. Simulation experiments prove that the method can estimate singularities and symbol rate of MPSK signals in lower SNR, which has good estimation performance and excellent low SNR performance.