Carrier frequency and chip rate estimation based on cyclic spectral density of MPSK signals

The problem of estimating accurately the carrier frequency and chip rate of MPSK signals is always a challenging subject in the case of lacking prior knowledge of the random code sequence and other signal parameters. A novel method of estimating carrier frequency and chip rate in severe signal environments is presented, based on the characteristics of cyclostationarity of MPSK signals and the spectral lines on the bifrequency surface. This method, with a high estimating accuracy, is proved by computer simulations.