瑞利分布时变水声信道仿真与实验

Time-varying UWA channel with Rayleigh distribution

摘要: 提出了一种使用Jakes仿真模型对时变水声信道进行模拟的方法。该模型是在研究水声信道衰落特性的基础上,基于信道包络服从瑞利分布而提出的。利用瑞利信道的多径延迟向量和功率向量,根据多普勒频率扩展对信道的时变性进行仿真,计算量较小。使用试验数据中提取的参数对声信道进行了仿真,并与海试实测信道进行了对比分析,通信误码率、星座图和信道的频率响应都比较相近,证明该模型是对随机时变衰落的多径水声信道进行仿真的一种简单有效的方法。

Abstract: A method using Jakes model is proposed to simply simulate the time-varying UWA channel.Using the delay vector and power vector with Doppler frequency spread information,the time-varying UWA channel with Rayleigh distribution can be simulated.By comparing BER,demodulation constellation of received signals,and the frequency response between the simulator and the actual shallow sea UWA channel,the model is proved simple and practicable.