A New Method for Blind Parameter Estimation of Multicomponent Frequency-Hopping Signals
Zhang Er-yang · Signal Processing · 2009
First,a new time-frequency analysis method,spectrogram and smoothed pseudo WVD synthesis is proposed,which can obtain robust results with good time-frequency concentration and suppression cross-term interference performance.Second,the peaks of time-frequency distribution are detected based on 2-D (two-dimensional) quadratic difference method.The projection of every peak on the frequency-axis is the estimation of carrier frequency,and the projection on the time-axis is hop duration' s central time (CT).Third, the estimation of hop duration based on sequential CT differences histogram is given.At last,the hop timing can be estimated by the sta- tistical remainders of CTs divided by the hop duration's estimation.The simulation results demonstrate that the estimation algorithm is effective and efficient.