利用声纳基阵实现多通道分集与均衡

Multi-channel diversity and equalization using sonar array

在水下电报、远程控制、语音和图像传递等水声通信技术中,由于海洋水声信道是一个时变、频变、空变的非平稳随参信道,使得水声信道的传输速率低、频率资源利用率有限、码间干扰严重、误码率高。针对海洋水声信道的特点,描述如何利用基阵声纳的多通道结构,来实现多通道分集与联合均衡,从而减小多途效应引起的水声通信中的码间干扰,使得陆地移动通信系统中的一些先进技术能够在此基础上得到应用,并为现有的目标探测声纳增加水声通信功能提供参考。

In recent years, there has been a growing interest in various applied aspects of underwater acoustic （UWA） communication, such as telemetry, remote control as well as speech and image transmission. UWA channels can be characterized as rapidly varying time-frequency-space dispersive ones, which lead to low transmission rate, limited bandwidth efficiency, and high inter-symbol interference. At present, large amount of sonar systems with large array on ships are with multi-channel structure. In this paper, the multi-channel structure is taken advantage of realizing mul- ti-channel diversity and equalization, so that the inter symbol interference （ISI） in UWA communication can be re- duced.