Single Frequency Estimator Based on Prefilter
Xiao Yangcan · Journal of Southwest Jiaotong University · 2009
A new method for estimating the frequency of a complex sinusoid in complex white Gaussian noise was proposed to acquire a uniform performance within whole frequency estimation range.With this method,the signal-to-noise ratio(SNR) of input signal can be improved by utilizing a non-rectangle prefilter.Furthermore,compared with some conventional autocorrelation-based and phase-based methods,the new method can attain the Cramer-Rao bound(CRB) even at a low SNR value by using the iterative method.A theoretic analysis and numerical simulation show that the performance of the proposed method is uniform and good within the frequency estimation range.