改进Turbo码与MIMO-OFDM级联的系统性能分析  

Performance Analysis of Improved Concatenated System of Turbo Code and MIMO-OFDM

作　　者：俞传峰 张翠翠[2] 李李[2] 

机构地区：[1]淮北市广电传输中心,安徽淮北235000 [2]安徽大学计算智能与信号处理教育部重点实验室,安徽合肥230039

出　　处：《通信技术》2008年第9期56-58,共3页Communications Technology

基　　金：国家自然科学基金资助项目(60772123)

摘　　要：文中研究了MIMO-OFDM系统中的空时分组编码,并在此系统的基础上与Turbo码进行级联,从而使系统具有分集和抗多径衰落的性能。为了更进一步的减少系统误码率,文中对Turbo码的译码算法进行改进后,与MIMO-OFDM再进行级联。仿真结果表明,改进的Turbo码译码算法与其他译码算法相比,减少了误码率。这种级联后的系统比传统的MIMO系统的性能有较好的改善。In this paper, the space-time block coding of the MIMO-OFDM system is studied, and on this basis, the system is concatenated with Turbo Codes in order to obtain the diversity and ability of anti-multipatb fading. To further reduce BER of the system, the Turbo Code Decoding algorithm is improved, then concatenated with the MIMO-OFDM system. The simulation results show that, as compared with other decoding algorithms, the proposed algorithm can reduce BER. The improved system is better than traditional MIMO systems in performance.

关 键 词：空时码 MIMO-OFDM LOG-MAP算法 改进的Max-Log-MAP算法 

分 类 号：TN915[电子电信—通信与信息系统]