声场模型的海洋水声信道通信系统研究

Research on sound field model based underwater acoustic channel communication system

海洋环境通常复杂多变,时常受到时变、频变、空变随机特性及噪声引起的各种干扰,造成海洋水声信道中的通信过程中存在着严重的信号失真和畸变,极大地降低了水声通信系统的可靠性和有效性。因此对水声信道进行研究和特性分析,对于设计水声通信系统而言意义重大。本文进行基于声场模型的海洋水声信道通信系统中的信道分析与仿真,采用Kraken简正波模型对海洋信道通信系统的传播损失特征进行分析。仿真结果表明,Kraken简正波模型应用于海洋信道通信系统传播损失特征分析的可行性和有效性。

As ocean environment is complicated and varied,such as UWA( under water acoustic)channel's time,frequency,space-varying characters and all kinds of noises makes sound signals strongly distorted and fluctuated during their transmission through UWA channel. The disturbance severely reduces the reliabilities and validity of the UWA communication system. So the research of UWA channel is the foundation of designing UWA communication system. This paper focuses on UWA channel modeling and simulation research based on sound field model. It derives the propagation losses by use of the Kraken normal wave mode. The simulation result demonstrates the availability and usefulness of the Kraken normal mode.