Recursive Decoding Based Multi-channel M-ary Spread Spectrum Underwater Acoustic Communication

Abstract The spread spectrum communication method has strong anti-noise and anti-fading capability, but it also brings the problem of low information transmission efficiency. paper proposes a multi-channel M-ary method, using recursive decoding algorithm to reduce bit error rate. In combination with channel equalization technique based on virtual time reversal mirror technique, scheme improves rate communication. It is verified through computer simulation sea trial data that can effectively mutual interference between different signals, which provides new idea for design hydroacoustic scheme.