Based on wavelet transform

a new method for detecting transient signals has been proposed.A class of wavelet basis functions has been introduced to detect transient signals with unknown waveforms and arrival times.By using multiscale wavelet transform

the proposed detector works well under low SNR.The detection statistic based on the wavelet coefficients has been given and the performance of the detector has been evaluated.Theoretical analysis and computer simulations have shown that the proposed scheme is effective.