Instantaneous Characteristics Extraction of Track Circuit FSK Based on Wavelet Ridge
Jin Xiao-hong, Csr Electric · Electric Drive for Locomotives · 2007
With wavelet-ridge-curve technology,the signal characteristics can be extracted effectively.By the iterative calculation,the phases of the continuous Morlet wavelet transformation are used to extract the ridges of railroad FSK signals.With the algorithm,the instantaneous characteristics of the actual FSK data are extracted,which proves that the algorithm works effectively for the extraction of the instantaneous frequency and low frequency control signal.The steps for algorithm are also given in detail.An effective and simple method to analyze and judge the track circuit frequency-shift signal is developed.