Experimental research on sound pulse propagation and channel match in shallow water

Theoretical and experimental research of low frequency pulse compression and channel match in shallow water sound channel were carried out based on 2000-Winter Yellow Sea experiment. Using pulse compression method, signals with high signal to noise ratio (SNR) were received over range of 110 kilometers in the experiment. The SNR gain in the process is consistent with the theoretical prediction. The experimental measurement indicated that the channel is highly coherent over a length of 500 s. Channel match method was used to compensate the degradation of pulse compression SNR caused by the multi-path propagation. And the SNR gain in the channel match process can be theoretically predicted. Experimental results show that low frequency pulse compression and channel match method can be used in shallow water sound channel to improve the SNR.