电讯技术2017，Vol.57Issue(12)：1349-1355,7.DOI:10.3969/j.issn.1001-893x.2017.12.001
一种咬尾双二进制Turbo码并行译码方案
A Parallel Decoding Scheme for Tail-biting Duo-binary Turbo Codes
摘要
Abstract
When the tail-biting duo-binary Turbo codes use parallel and sliding window joint decoding technology,the tail-biting encoding structure and the window segmentation lead to the difficulty of obtai-ning the boundary state metric. To solve the problem,this paper presents a novel parallel and sliding win-dow decoding scheme called extended overlap scheme. The new scheme utilizes two new decoding tech-niques:the boundary state blind estimation technique and the sliding window state backtracking technique. Compared with the traditional Boundary State Metric Propagation( BSMP) method( also called the iterative method) ,on the one hand,the new method improves the accuracy of the boundary state metric,thus speed-ing up the decoding convergence,and reducing the performance loss at a high signal-to-noise ratio( SNR) to some extent. On the other hand,it helps to avoid storing the state metric of the last iteration,which is more conducive to the hardware design. Simulation results show that this method can eliminate the effects of parallel and sliding window,approximating the performance of the original non-parallel and non-sliding window decoding method at the medium window length about 64. And the smaller the window length is,the more obvious the decoding performance gain is than the traditional iteration method. Therefore,this scheme has better practicability and application value,which satisfies the current high speed,low latency and low storage data transmission requirements of 5G.关键词
双二进制Turbo码/滑动窗译码/并行译码/咬尾码Key words
duo-binary Turbo code/slipping window decoding/parallel decoding/tail-biting code分类
信息技术与安全科学引用本文复制引用
王琼,王伦,杨太海..一种咬尾双二进制Turbo码并行译码方案[J].电讯技术,2017,57(12):1349-1355,7.基金项目
国家科技重大专项(2016ZX03002010-003) （2016ZX03002010-003）
