Turbo码最优周期交织器  

Optimal Period Interleaver for Turbo Codes

作　　者：祁峰[1] 王睦重[2] 邵定蓉[1] 张彦仲[1] 

机构地区：[1]北京航空航天大学电子工程系 [2]香港理工大学电子及资讯工程学系

出　　处：《北京航空航天大学学报》2000年第4期381-384,共4页Journal of Beijing University of Aeronautics and Astronautics

基　　金：香港理工大学资助项目 !( 357/ 0 4 2和 353/ 14 8)

摘　　要：从码字重量分布的角度分析了影响Turbo码性能的原因 ,介绍了Turbo码最优周期交织器的概念 ,然后基于这一概念 ,为Turbo码提供了一个新的交织器设计方法 ,并对采用这种交织器的Turbo码的性能进行仿真 .与几种常用的交织器相比 ,这样的交织器使Turbo码的性能有了很大改善 ,这种改善在高信噪比的环境中更为明显 .最优周期交织器的应用对于实际的Turbo码交织器设计有重要的意义 。By analyzing the relation between input sequences and feedback polynomials, we find the reason why low weight codewords for Turbo code are generated. The concept of optimal period interleavers for Turbo codes is introduced. A novel design scheme for interleavers used for Turbo codes is presented. The main idea of this method is to design the interleaver based on an optimal period interleaver. Simulation results are presented for Turbo codes using our interleavers. A magnitude improvement in bit error rate performance is obtained at high signal noise ratio compared to Turbo codes using other conventional interleavers. According to simulations results, it is significant to apply the optimal period interleaver in the practical interleaver design. This is particularly of interest to Turbo coding applications in mobile communications where short frames are typical.

关 键 词：反馈 卷积码 信噪比 TURBO码 移动通信 

分 类 号：TN911.22[电子电信—通信与信息系统]