水声通信系统性能评估方法研究

Research on the performance evaluation method for underwater acoustic communication system

水声通信系统性能主要受水声信道和通信体制影响,通常采取海洋水声试验的手段进行性能测试,但这需要进行多次不同信道条件下的试验才能得出正确的评估结论,难度较大且成本较高。因此,建立准确的水声通信系统性能评估模型和评估方法,对于通信系统设计及性能预测显得尤为重要。从水声信道模型开始分析,结合水声通信特点,讨论了典型水声通信接收机结构,提出了一种通用水声通信系统性能评估模型和方法,并针对采用QPSK调制的通信系统性能进行了评估,结果与海试数据较为接近。

The performances of Underwater Acoustic Communication System（UACS） are mainly influenced by the channel condition and communication modulation pattern. Usually, it is needful to conduct ocean acoustic trials time after time in different environments; obviously,this is difficult and also costly. Therefore,it＇s very important and useful to construct a performance evaluation model for UACS design and performance prediction. In this paper the underwater acoustic channel is discussed first, and then, on the basis of the channel character,a typical receiver and an evaluation model are proposed and researched. Finally, an example using QPSK modulate is taken to test and verify, the result is satisfactory.