Weighted fusion algorithm for frequency estimation of the short signal with the same frequency and length
Hai‐Tao Zhang · Journal of Chongqing University. English Edition · 2012
For high precise frequency estimation of the short sinusoid signal at low signal-to-noise ratio(SNR),a weighted fusion algorithm for frequency estimation of the short signal with the same frequency and length(SFL-Signal) is proposed.The spectrum model of SFL-Signal and the phase compensation matrix with phase coherent and noise cancellation are constructed.Secondly,the SFL-signal spectrum is weight-fused with the phase compensation matrix to obtain the result almost the same as that of the spectrum of the phase-coherent sinusoid signal.Consequently,high frequency estimation precision is obtained with spectral peak searching of the weight-fusion spectrum.Algorithm analysis and simulation results show that,compared with the existing methods,the proposed algorithm works better in term of precision,calculation complexity,noise immunity,and fits for any type of SFL-Signal.