摘要
对于水声通信系统,水声信道存在严重的多径效应,其产生的多径时延会引起严重的码间干扰,从而导致不同程度的信号衰落和畸变。鉴于这一问题,在水声信道相干时间范围内,基于一种相干多径的信道简化模型,通过计算机仿真分析多径效应对水声通信系统的影响,并在不同声速梯度分布情况下进行仿真分析,同时结合水声信道的其他传播特性,在不同海况下(浅海和深海)分别进行仿真验证。上述仿真研究结果表明,相干多径模型在一定程度上正确合理地模拟了海洋水声信道的传播特性。
There exits muhipath effect in the channel for underwater acoustic communication system. The effect could produce long delay, cause severe intersymbol interference and lead to signal fading and distortion. Therefore it is necessary to establish correct mathematical model and carry out simulation analysis. Within the coherence time of underwater acoustic channel, a simplified coherent multipath channel model is proposed. Firstly, the simulaton and analysis on the effect of coherent muhipath to underwater acoustic communication system is done, and the simulation research carried out under the condition of different velocity gradient distribution. Then, in combination with other propagation characteristics of underwater acoustic channel, the simulation analysis and verification is implemented respectively in different sea conditions. The all simulation results show that the proposed model can fairly simulate the propagation characteristics of underwater acoustic channel.
出处
《通信技术》
2016年第7期799-806,共8页
Communications Technology
基金
黑龙江省自然科学基金(No.F2015018)~~
关键词
水声通信
水声信道
相干
多径
建模
仿真
underwater acoustic （UWA） communication
UWA channel
coherent
muhipath
modeling
simulation
