多径效应下水声通信波特间隔均衡算法

Potter Interval Equalization Algorithm for Underwater Acoustic Communication

在水下航行器水声通信中,由于水声信道的快速时变衰落特性导致多径效应,通信信道难以均衡。对多径效应下的水声通信信道进行均衡设计,改善通信环境和质量。传统方法采用分块均衡算法,对待发送的通信信号进行分块处理,这一过程中可能导致分块不均和非线性失真,信道均衡效果不好。提出一种基于波特间隔均衡的多径效应下水声通信信道均衡算法。分析了水声通信信道的特性和信道均衡原理,建立一个时变衰落、多径和加性干扰的水声信道模模型,在自适应均衡算法的基础上,引入波特间隔均衡技术,实现水声通信信道均衡算法的改进。仿真结果表明,采用该算法能有效实现水下航行器水声通信的信道均衡,提高输出信噪比,降低通信误码率,展示了较好的应用价值。

In underwater acoustic communication,because of the fast time varying fading of underwater acoustic channel,the multipath effect is difficult to be balanced.A balanced design of underwater acoustic communication channel is carried out to improve the communication environment and quality.In the traditional method,the block equalization algorithm is used to deal with the transmitted signal,which may lead to uneven and nonlinear distortion.The channel equalization effect is not good.A channel equalization algorithm for underwater acoustic communication based on Potter＇s space equalization is proposed.Underwater acoustic communication channel characteristics and channel equalization theory are analyzed,and establish a time-varying fading,multipath and interference of underwater acoustic channel model,in the adaptive equalization algorithm based on,baud spaced equalization technology is introduced,to achieve the improvement of channel equalization algorithm of underwater acoustic communication.The simulation results show that the proposed algorithm can effectively achieve the channel equalization of underwater vehicle underwater acoustic communication,improve the output SNR and reduce the communication error rate,and show the good application value.