基于LTE标准的Turbo码编译码性能研究  

The Research of Turbo Coding and Decoding Performance based on LTE

作　　者：赵旦峰[1] 刘兴业[1] 朱铁林[1] 薛睿[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院

出　　处：《科技致富向导》2011年第12期10-12,共3页Guide of Sci-tech Magazine

基　　金：哈尔滨市科技创新专项(2009RFXXG029)

摘　　要：在对LTE标准下Turbo码编译码结构及原理深入分析的基础上,对QPP交织器的交织算法及距离属性进行了详细推导,根据QPP最大无冲突交织的特点,提出一种新型并行译码方案,通过周期性插入归零比特的方式,消除了边界度量的模糊性。结合线性拟合Log-MAP译码算法,建立系统模型,对影响纠错性能的各项因素进行了仿真,仿真结果表明：将所提并行译码方案与线性拟合Log-MAP译码算法相结合应用于LTE协议中,在保证译码性能的同时,能有效减小译码时延,既能满足低信噪比的要求,也利于硬件实现。Based on the in-depth analysis of the structure and principle of Turbo Codes in LTE, the interleaving algorithm and distance property of QPP interleaver is derived detailedly. According to the property of maximum contention-free interleaving for QPP interleaver, a new parallel decoding scheme is proposed. The illegibility of initial boundary is eliminated by way of inserting tail bits periodically. The system model is established combining linear fitting Log-MAP decoding algorithm. Various factors that affect the error correction performance are simulated. Simulation results show that： combination of the proposed parallel decoding scheme and linear fitting Log-MAP decoding algorithm in LTE can reduce the decoding delay while ensuring the decoding performance. The scheme not only satisfies the requirements of the low signal to noise ratio, but also is propitious to hardware implementation.

关 键 词：TURBO码 LTE 并行译码 QPP交织器 线性拟合Log-MAP 

分 类 号：TN911.22[电子电信—通信与信息系统]