Instantaneous frequency estimation of frequency modulation signals in low signal noise ratio
Wang Bing-feng · Information technology newsletter · 2009
This paper presents an instantaneous frequency iterative estimation based on the cross Wigner-Ville distribution(XWVD).The convergence of the method is analyzed theoretically.The estimation variance of different methods in noise is compared by simulation,and this algorithm is demonstrated having good performance for linear frequency modulation(FM) signals under low signal noise ratio.This method is improved by a sliding window,which is effective in estimation of nonlinear FM signals according to simulation results.