Wide-band signal detection based on time-scale domain two-dimensional correlation

Following the idea of correlation detection, a wide-band signal detection method that is based on two-dimensional correlation in the time-scale domain of continuous wavelet transform (CWT) is presented. The performance of this detector is analyzed by simulations and experiments. It shows that a CWT based detector has a good performance, far better than that of the energy detector, and a smaller reduction than that of the matched filter, especially at a low signal to noise ratio. This method is not only suitable for wideband acoustic signal processing, but also fit for the processing of other transient signals whose waveform and arriving time are unknown.