TD-LTE系统中Turbo译码算法及DSP实现  

Turbo decode algorithm and DSP realization in TD-LTE system

作　　者：彭德义[1] 李小文[1] 

机构地区：[1]重庆邮电大学移动通信技术重点实验室,重庆400065

出　　处：《电子技术应用》2012年第10期106-108,115,共4页Application of Electronic Technique

基　　金：国家科技重大专项(2009ZX3002-009);(2011ZX03001-003-01)

摘　　要：在TD-LTE系统中,Turbo码以其优异的纠错性能而备受关注。针对传统Log-Map算法译码复杂度大且时延长的缺点,提出一种简化的Log-Map算法。在高斯白噪声信道(AWGN)环境下,对各种Turbo译码算法性能进行了仿真比较,并对提出的简化译码算法在TMS320C64xDSP中进行实现。译码程序在CCS3.3的运行结果表明了该方案的实时性和有效性。Turbo code is highly accepted for its excellent rectifying performance in TD-LTE （Time Division-Long Term Evolu- tion） system, concerning to the high decoding complexity and the long time delaying of traditional Log-Map algorithm, a simplified Log-Map algorithm was proposed, this paper compared a variety of Turbo decode algorithms through simulation in the atmosphere of AWGN, and realized the proposed simplified algorithm in the TMS320C64x DSP. The running results of the decoding program in CCS3.3 verify that the scheme is feasible and effective.

关 键 词：长期演进 TURBO译码 LOG-MAP算法 DSP实现 

分 类 号：TN929.5[电子电信—通信与信息系统]