Abstract:

An amelioration algorithm to the FH(Frequency-Hopping) signals parameter estimation,United Algorithm basted on  STFT(Short-Time Fourier Transform) and WVD（Wigner-Ville Distribution), was proposed to solve the problems of failing timefrequency resolution and oversize operation quantity, which occur in FH signals parameter estimation with smoothed Pseudo WVD (SPWVD). STFT-WVD could achieve FH signals parameters blind estimation successfully, which include hopduration,hoptiming and hopfrequency. In parameter estimation, STFT-WVD suppresses the crossterm interference in WVD effectively, and keeps the excellent timefrequency resolution as WVD. The operation quantity is almost equivalent between STFT-WVD and WVD,the STFT-WVD does not increase the complexity degree of the operation. Finally, the simulation result proves that the holistic performance of STFT-WVD is better than SPWVD, and STFT-WVD can get more precise parameter estimated values while SNR exceeds－1 dB.

Key words: frequency-hopping signals, parameter estimation, Wigner-Ville distribution（WVD）, united algorithm