基于声矢量传感器的水声通信技术研究

The study of underwater acoustic communication technology based-on the acoustic vector sensor

基于声矢量传感器声压和振速联合加权处理可以提高空间处理增益的原理,将声矢量传感器应用于相位调制的高速水声通信中,并结合自适应均衡算法,研究了相干解调和解码的方法。基于声矢量传感器声强处理可以抵消各向同性干扰、提高信噪比的原理,研究了在频率调制的水声通信系统中,利用声强解码代替声压解码的方法。理论分析、仿真研究和湖上试验结果表明:利用声矢量传感器相对于声压传感器来说,可以提高解码处理增益,进而提高了水声通信系统的作用距离、降低误码率。

Based on the principle that sound pressure and velocities joint weighted processing can increase space processing gain, the methods of the coherent demodulation and decoding with the acoustic vector sensor for high speed UWA communication have been studied. Whereas, based on the principle that the sound intensity can cancel the isotropic noise and increase signal to noise ratio, the frequency modulation UWA communication technique by using acoustic vector sensor has also been studied. The results of theory analysis, computer simulation and lake trials have shown that either in phase modulation or in frequency modulation UWA communication system, the processing gain can be evidently increased, so that by using the acoustic vector sensor the BER（Bit Error Rate） can be effectively reduced and/or the telemetry distance can be enlarged.