Optimum signal processing of vertical mode-selective array in shallow water

The normal modes with different mode number can be separated by using a vertical mode-selective array in shallow water. The optimum receiver may be implemented by means of coherence integrating of the separated modes. This paper suggests that the coherence integrating of modes can be implemented by using adaptive correlation cancellation loops or correlation filters to get same phase. The performance analysis and some results of the model experiments are given. Using this method, the output SNR can be improved and the interference due to multipath arrival can be removed. So, the reliability of detection will be improved and the code rate of communication may be increased.