Wigner-Ville Distribution and Its Application in Identification of FMCW
Leping Chen · Journal of Yantai University · 2009
The FMCW signal and Wigner-Ville distribution(WVD) are introduced and the recognition of FMCW signal with WVD method is studied.Based on WVD,PWVD,SPWVD and RSPWVD respectively,the FMCW signals with ∞,6dB,3dB,0dB,-3dB and-6dB SNR are simulated by MATLAB.The compared results indicate that WVD has poor noise immunity and larger cross-term.When the SNR is small,the FMCW signal can hardly be recognized.For the PWVD and SPWVD,there are smaller cross terms but worse time-frequency assembling character,which limits the improvement of noise immunity.Compared to the other methods,the RSPWVD can obtain better performance in all respects.