The use of power cepstrum for multipath signal detection in underwater acoustic channel

Abstract

The multipath effect is the primary interference factor among the underwater communication systems. Underwater acoustic channels are characterized as time-variant dispersive channels. Multipath propagation results in spreading of the transmitted signal in time, which leads to serious Signal amplitude attenuation and inter symbol interference (ISI). Here we describes a signal processing approach identified as “power cepstrum technique,” which has been found is efficient in recognizing wavelet arrival times and amplitudes, even in the present of noise. Thereby, a special signal, which has a short duration as well as a high power, is designed to detect the multipath effect of the channel.