Influence of underwater acoustic multipath structure on time reversal passive detection

According to the current situation that underwater multipath structure are mostly assumed to be constant in time reversal passive detection, based on the characteristic of time reversal processing, the influence of variation of underwater multipath structure, which is caused by horizontal range and sound velocity, on time reversal passive detection performance is simulated and analyzed with ray propagation theory. The conclusions indicate that, in low SNR area, the detection performance declines with the increase of horizontal range, however, compared with the signal without time reversal, time reversal processing reduces the negative influence of range on detection performance; time reversal passive detection performance well when the sound velocity changes slowly, while its performance will decline when the sound velocity changes dramatically.