Rician信道下串行级联Turbo码性能仿真及改进研究  

Simulation and Improvement of the Performance of Serially-concatenated Turbo Code under Rician Channel

作　　者：李宏博[1] 耿道田[1] 

机构地区：[1]空军工程大学理学院,陕西西安710051

出　　处：《现代电子技术》2011年第19期15-17,20,共4页Modern Electronics Technique

摘　　要：在Rician信道条件下,构建了一个通信系统模型,研究了串行级联Turbo码的性能,并进行了仿真分析。在此基础上根据自适应滤波原理改进了原有系统模型。仿真结果表明,当主径衰落因子在一定范围内时,运用自适应滤波算法的改进模型可以提高系统性能,带来额外信噪比增益约0.5dB。A communication system model is constructed under Rician channel,the performance of serially-concatenated Turbo code is studied and simulated.According to the principle of adaptive filtering,a modified system model is proposed and its performance is also analyzed.Simulation results show that within a certain range of the Rician factor,the system performance can be improved by the modified model of adaptive filtering algorithm and an additional SNR gain about 0.5dB can be produced.

关 键 词：串行级联Turbo码 Rician分布 NLMS算法 横向滤波器 

分 类 号：TN914-34[电子电信—通信与信息系统]