Turbo码在无信道状态信息的Nakagami衰落信道中的性能分析  

Performance analysis of Turbo codes on Nakagami fading channels without CSI

作　　者：张琳[1] 秦家银[1] 

机构地区：[1]中山大学信息科学与技术学院,广东广州510275

出　　处：《通信学报》2006年第12期43-47,54,共6页Journal on Communications

基　　金：国家自然科学基金资助项目(60572059);广东省博士启动基金资助项目(5300707)~~

摘　　要：讨论了Turbo码在无法获取信道状态信息的移动通信系统中的纠错性能联合上界,提出无信道状态信息时,Nakagami慢衰落信道中成对差错概率的2个精确计算式和2个近似计算式。数值分析结果表明,成对差错概率的2个精确计算式的数值积分曲线完全吻合;封闭形式近似计算式的计算结果与精确值相近。仿真结果说明,理论联合上界在高信噪比处逼近仿真性能。所提出的性能分析式可快速有效地评估无信道状态信息的移动通信系统中Turbo码的性能。Two exact expressions and two bounds for pairwise error probability over Nakagami fading channels with no channel state information （CSI） were proposed. Using the derived expressions and bounds, average union upper bounds for Turbo codes were investigated for the cases of ideal CSI and no CSI. It is shown that the two exact expressions for pairwise error probability overlap, and that the closed-form bounds avoid numerical integration and are close to the exact ones. It is also demonstrated that the proposed theoretical performance analysis conforms to the simulation results. The presented exact computation and bounds can lead to an efficient performance analysis.

关 键 词：成对差错概率 性能分析 TURBO码 

分 类 号：TN911.22[电子电信—通信与信息系统]