矢量水听器在水声通信系统中的应用

将矢量水听器应用于水声通信系统,利用矢量水听器的指向性屏蔽强干扰。建立了基于矢量水听器的多载波正交频分复用(OFDM)系统模型,对各向同性噪声场中矢量水听器的增益进行了推导,为抑制相干干扰提供了新的解决方案,并进行了仿真验证。仿真研究表明,该方案能够有效地增强系统的抗各向同性干扰的能力,达到提高信噪比的目的,降低了误码率,增加了系统的稳健性。湖上试验验证了该方法的有效性,表明基于矢量水听器的水声通信系统可为实现高速水声通信提供一种有效的途径。

The application of vector hydrophone in underwater communication system

Vector hydrophone is applied to the orthogonal frequency division multiplexing （OFDM） underwater acoustic communication system. The directivity of vector hydrophone is used to shield strong interference. Based on vector hy- drophone, the system model of multi-carrier OFDM is established, and the gain of vector hydrophone in isotropic noise field is derived, which is the foundation of the new solution to inhibiting coherence interference. Simulations indicate that the method can enhance anti-isotopic-interference, improve SNR, and reduce bit error rate（BER）. And, the result of a sea trial shows that the approach is efficient, and the communication system based on vector hydrophone is an effective solution to the high speed underwater acoustic communication.