一种新的补删截策略研究  

An Novel Depuncture Strategy for Channel Codes

作　　者：姚如贵[1] 王永生[1] 胡锦涛[1] 

机构地区：[1]西北工业大学电子信息学院,陕西西安710072

出　　处：《微电子学与计算机》2009年第4期19-21,25,共4页Microelectronics & Computer

基　　金：高等学校博士学科点专项科研基金(20060699010);航天科技创新基金(N7CH0001)

摘　　要：针对传统的补删截策略具有不公平性,会造成额外的误判,提出了一种新的、更具公平性的补删截策略.引入第三状态,考虑删截位的特性,重新定义Hamming距离的计算公式,使得删截位与比特1和0之间的距离相等.通过对3GPP中话音信道的卷积码进行仿真,结果表明该策略能够有效地改善译码性能、减小路径度量和分支度量的存储空间,并提高了译码速度.Considering that the unjustness of the traditional depuncturing strategy would bring the error decision for decoding, we propose a novel and impartial strategy. In this strategy, we introduce the third state for the punctured bits and reformulate the Hamming distance to make the punctured bits to be equidistant from i and 0. After simulating the eonvo- lutional codes used in speech channel proposed by 3GPP, the results show that the proposed depuneturing strategy can ef- fectively and efficiently promote the decoding performance, decrease the memory requirement for storing the path metric and branch metric and accelerate the decoding process.

关 键 词：信道编码 删截 补删截 卷积码 TURBO码 

分 类 号：TN911.7[电子电信—通信与信息系统]