Wide-band signal detection based on time-scale domain 2-D correlation

Following the idea of correlation detection, a wide-band signal detection method based on the 2-D correlation of time-scale domain of wavelet transform is presented in this paper. The performance of this wide-band signal detector is analyzed by simulation and experiment. It shows that CWT based detector has good performance far more than that of energy detector, and less decrease than that of matched filter, especially at low signal to noise ratio state. This method is not only suitable for wide-band acoustic signal processing, but also fit for the processing of other transient signals whose waveform and arriving time is unknown.