An Frequency Estimator for Large Frequency Offset and Low SNR Signals

An improved frequency estimator for low signal to noise ration(SNR)and high dynamic condition is put forward in this paper.By calculating the argument of autocorrelations,the improved estimator extends its estimation range to a half data rate and its accuracy is close to MCRB.It can be used in carrier frequency recovery for PSK signals and its applicability is verified by simulation and hardware implementation.