Study of underwater acoustic communication based on vector Pattern time delay shift coding

The vector sensor is proposed to apply to the field of the underwater acoustic communication based on Pattern time delay shift coding scheme. The underwater acoustic communication based on the pattern time delay shift coding communication system is a kind of pulse position modulation (PPM), in which the time delay shift values of the Pattern are used to encode the digital information. The azimuth estimation of the information source based on broad band synchronization signal and information code signal, combined decoding system based on sound pressure and particle velocities joint processing, modeling for vector field of isotropic noise, and the applications of the vector sensor in the field of underwater acoustic communication are studied in this paper. In this system, vector processing gain in the anti-isotropic interference field can be obtained, longer communication distance and lower bit error rate can be achieved as well, the multiple access interference at different positions can be eliminated, last but most important is azimuth variation quantity of moving source can be adjusted real-time by information code continued to come one after another. Simulation experiments testify the feasibility and reliability of the vector underwater acoustic communication based on Pattern time delay shift coding system.