摘要
多通道判决反馈均衡器(MC-DFE)是水声相干通信克服信道多径效应、消除码间干扰(ISI)的主要手段。本文提出了一种用于水声相干通信系统的分集合并自最佳自适应多通道判决反馈均衡器。该算法将快速自优化LMS分集合并(FOLMSDC)算法、快速自优化LMS(FOLMS)算法和快速自优化LMS相位补偿(FOLMSPC)算法有机地结合在一起。该算法一方面可以进一步减少运算复杂度,另一方面,由于算法中的步长因子和相位跟踪因子可以自适应地更新,因此算法可以更好地跟踪水声信道的变化,进一步提高通信系统的接收性能。仿真结果表明,本文提出的算法的性能优于现有算法。
Multi-channel decision feedback equalizer （MC-DFE） is the main method to overcome multipath fading and eliminate inter-symbol interference （ISI） for underwater acoustic coherent communication. A diversity combination self-optimized adaptive multi-channel decision feedback equalizer is proposed. It consists of fast self-optimized LMS diversity combination （FOLMSDC） algorithm, fast self-optimized LMS （FOLMS） algorithm and fast self-optimized LMS phase compensation （FOLMSPC） algorithm. The proposed algorithm not only can reduce computation complexity, but also improve receiver performance because its step-size factors and phase tracking factors can be adaptively updated with the varying underwater acoustic channel. Simulation experiment results show that the proposed algorithm performance is better than current available algorithm.
出处
《声学技术》
CSCD
北大核心
2007年第6期1259-1263,共5页
Technical Acoustics
关键词
水声相干通信
快速自优化LMS自适应更新算法
判决反馈均衡
underwater acoustic coherent communication
fast self-optimized LMS adaptive update algorithm
decision feedback equalization
