远程高速水声通信及实验研究

Experimental Research on Long-Range High-speed Underwater Acoustic Communication

严重受限的带宽是导致目前远程水声通信系统数据率较低的主要原因,针对这一问题,提出了带宽利用率高的相位相干远程高速水声通信方法;利用8PSK和16QAM信号进行了远程(30km)海上实验研究,结果表明,采用内嵌二阶锁相环的自适应判决反馈均衡器接收机可消除慢变水声信道的影响,在距离为30km,误码率在10^(-3)内的条件下,数据率可达1200 bit/s和1600 bit/s。

In the current long--range underwater acoustic communication system, the transmission bandwidth is severely restricted and leds to the lower data rate. To solve this problem, high bandwidth effective phase coherent underwater acoustic communication system was proposed in this paper. 8PSK and 16QAM signals were used to a long--range （30km） offshore experimental study. The experiment results show that the receiver which used the second--order phase--locked loop adaptive decision feedback equalizer have a good performance to eliminate the effects induced by slow--varying underwater acoustic channel, and the system＇s data rate can be up to 1200 bit/s and 1600 bit/s at 30km distance with the bit error rate is .