A space filtering algorithm in phase modulation underwater high speed communication

A space filtering processing algorithm,smart antenna technology combined with temporal-space DFE equalization algorithm is proposed in this paper.Its implement courses are multi-antenna (hydrophone) receive,multi-beam smart antenna algorithm and spatio-temporal decision feedback equalization.The algorithm was used in an underwater QPSK modulation wireless communication system,error code rate result of this algorithm and traditional space diversity algorithm in same lake experiment condition separately are 2.9×10^-3 and 8.62×10^-2.This algorithm obtained lower 10 times error code rate than the diversity algorithm,and effectually restrained the influences of multi-path interference.