吉林大学学报（信息科学版）2017，Vol.35Issue(3)：261-267,7.
Gamma-Gamma信道下LDPC码译码算法性能分析
Performance Analysis of LDPC Decoding Algorithm under Gamma-Gamma Channel
摘要
Abstract
In order to reduce the LDPC (Low-Density Parity-Cheek) complex ity of decoding algorithm, studied the LLR BP (Log-Likelihood Ratio Belief Prop agation algorithm) and its simplified decoding algorithm, and an improve d algorithm based on NMS (Normalized Min Sum) algorithm is proposed;studied the Gamma-Gamma distribution model and Gamma-Gamma distribution as the channel mo del are studied.The performance of LLR-BP and its simplified algorithm under different turbulence intensities are compared with Matlab, the simulation resul ts show that both in the AWGN (Additive White Gaussian Noise) or different turbulence intensity Gamma-Gamma cha nnel, the improved algorithm has better performance in decoding algorithms in pa rticular, the performance advantages of the improved algorithm in strong turbule nce is more obvious.The simulation results show that the increase of the code l ength can improve the performance of the BER (Bit Error Rate).关键词
低密度奇偶校验码/Gamma-Gamma分布/LLR-BP算法/最小和算法/归一化BP算法Key words
low-density parity-cheek (LDPC)/Gamma-Gamma distrib ution/log-likelihood ratio belief propagation (LLR-BP)/min sum algorithm/no rmalized BP-based algorithm分类
信息技术与安全科学引用本文复制引用
徐峰,赵晓晖..Gamma-Gamma信道下LDPC码译码算法性能分析[J].吉林大学学报（信息科学版）,2017,35(3):261-267,7.基金项目
长春市科技计划基金资助项目(3D5154815420) （3D5154815420）
