浙江大学学报（理学版）2016，Vol.43Issue(5)：573-579,7.DOI:10.3785/j.issn.1008-9497.2016.05.014
基于LDPC／Turbo双模译码器的自适应迭代译码算法研究
Research on adaptive iterative decoding algorithm based on LDPC/Turbo dual-mode decoder
摘要
Abstract
In view of the shortcoming that the design of LDPC/Turbo dual‐mode decoder does not fully consider the precise calculation of iteration number ,we propose a adaptive iterative decoding algorithm which is suitable for LDPC and Turbo codes .The algorithm is used to calculate the error probability by tracking the middle messages ,and to calculate the number of iterations according to multi‐conditions ,thus we can achieve the self‐adaptability of the variation of the decoding algo‐rithm according to the error probability .We reduce the average number of iterations by applying an improved predecision mechanism ,and build the test link of WIMAX system on Matlab platform to test the relationship between the BER per‐formance of the multi‐algorithms and iteration number ,and implement the LDPC/Turbo dual‐mode decoder with 12 SISOs parallel processing units .The result shows that the design of the decoder fully satisfies the requirement of the maximum code length under the standard ,and can reduce the redundant iterative process .关键词
LDPC/Turbo/双模译码器/迭代次数/WIMAX标准/自适应迭代译码Key words
LDPC/Turbo/dual-mode decoder/iteration number/WIMAX standard/adaptive iterative decoding分类
信息技术与安全科学引用本文复制引用
王秀敏,洪芳菲,殷海兵,李正权,肖丙刚..基于LDPC／Turbo双模译码器的自适应迭代译码算法研究[J].浙江大学学报（理学版）,2016,43(5):573-579,7.基金项目
国家自然科学基金资助项目（61379027，6157118，615721449）；浙江省公益技术应用研究计划国际合作项目（2015C34006）． （）
