Turbo码在最大比合并分集接收系统中的性能分析  

Performance Analysis of Turbo Codes for Maximal Ratio Combining Receivers

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,广州510275

出　　处：《电子与信息学报》2006年第9期1618-1621,共4页Journal of Electronics & Information Technology

基　　金：国家自然科学基金重点项目(90304011);广东省博士启动基金(5300707)资助课题

摘　　要：该文提出了turbo码在最大比合并分集接收无线通信系统中纠错性能的联合上界。基于误差积分函数的简化计算式,推导了分集接收的多路信道分别具有不同衰落特性时,成对差错概率的精确表达式。以瑞利衰落信道为例,对采用turbo码的分集接收无线系统的性能进行了数值计算和仿真。结果表明:turbo码纠错性能联合上界数值计算式与仿真结果一致,可普遍用于信道衰落统计特性各不相同的分集接收系统。Upper union bounds of turbo codes for maximal ratio combining （MRC） diversity systems are presented in this paper, The simplified expression of error integral function is used to derive the precise expressions of pairwise error probability for MRC receivers wherein the probabilities of slow fading multichannel come from different distribution families, The numerical analysis and simulations performed over Rayleigh channel demonstrate that the theoretical analysis conforms to the simulations, It is concluded that the derived expressions can be generally used for the performance estimation of MRC multichannel receivers with different fading statistics.

关 键 词：TURBO码 最大比合并分集接收 衰落信道 成对差错概率 

分 类 号：TN911.22[电子电信—通信与信息系统]