基于迭代译码有效性的交织器设计方法  

Interleaver Design Based on the Iterative Decoding Suitability

作　　者：李晓辉[1] 吴小培[1] 翟娟娟[1] 

机构地区：[1]安徽大学计算智能与信息处理教育部重点实验室电子工程与信息科学系,合肥230039

出　　处：《系统仿真学报》2004年第10期2361-2363,共3页Journal of System Simulation

基　　金：安徽省自然科学基金项目(03042209)

摘　　要：分析了交织器设计对Turbo码性能的影响,提出了一种基于减小外赋信息和译码器输入之间相关性的交织器设计方法,以获得合适的交织器矢量。减小了外赋信息和各个位之间的相关性,提高了迭代译码的有效性。计算机仿真结果表明:基于减小外赋信息和译码器输入之间相关性设计的交织器性能大大优于随机交织器,且略优于S-random交织器。同时,与S-random交织器相比,本文提出的实现算法计算复杂度相对较低,从而提高了算法的有效性。The effects of interleaver design for Turbo code performance are analyzed in this paper. An interleaver design method based on minimizing the correlation coefficients between the decoder inputs and extrinsic outputs is proposed. The correlations between the each bit of decoder inputs and extrinsic outputs are reduced, and then the suitability of iterative decoding is improved. The simulation results show that the performance of interleaver using the correlation between the extrinsic outputs and decoder inputs is much better than that using random interleaver, and is slightly better than using S-random interleaver. The computational complexity of the algorithm proposed in our paper is lower than S-random interleaver, and thus the suitability of the algorithm is raised highly.

关 键 词：TURBO码 交织器 迭代译码 相关性 

分 类 号：TN911.22[电子电信—通信与信息系统]