水声信道中一种抗多途跳频通信的研究

Research on anti-multipath frequency hopping communications in underwater acoustic channels

水声通信系统是当代海洋开发和海洋环境立体监测中的重要技术组成部分 ,广泛应用于海洋监测、海洋资源勘探和开发等方面 .然而 ,水声信道的随机起伏、时 空 频变的多途特征使水声通信技术成为当代最为复杂的通信技术之一 .本文介绍近年来在高速水声通信方面的一些研究进展 ,讨论了一种利用高速数字信号处理器(DSP)实现水声信道跳频通信的方案 ,并探讨了该方案在调制信号设计及信号处理实现上所采用的关键技术 .

As an important technical part of modern ocean exploration and ocean enviroment surveillance system, underwater acoustic communication system is widely used in ocean surveillance, ocean resource exploration and exploitation. Because of random variability in time space frequency and severe multipath channels, underwater acoustic communication technology becomes one of the most complex communication technology . In this paper, some research development in high speed underwater acoustic communication in recent years is presented,and then a method realizing FH communication in underwater acoustic channel employing high speed DSP is introduced and the key technology on modulation signal design and signal processing of this method is analyzed.