摘要
本文以规则低密度生成矩阵码为基础,构建了一种以之型码为分量码的系统广义低密度奇偶校验(Generalized Low-Density Parity-Check,GLDPC)码,称为ZS-GLDPC码.该码具有线性编码复杂度,可采用和积译码算法实现迭代译码,其译码复杂度低于以汉明码为分量码的GLDPC码.在均匀交织器的前提下,利用联合界分析了该码在高信噪比区域的平均误比特概率,然后利用基于高斯近似的密度进化方法分析了该码的迭代译码收敛门限.仿真结果表明,中短码长的ZS-GLDPC码的性能优于或近于LDPC码和以汉明码为分量码的GLDPC码.
A class of systematic generalized low-density parity-check(GLDPC) codes with zigzag codes as component codes,termed ZS-GLDPC codes,is proposed on the basis of regular low-density generator matrix(LDGM) codes.The proposed codes have linear encoding complexity,and can be decoded by the sum-product algorithm iteratively.The decoding complexity of ZS-GLDPC codes is lower than GLDPC codes with Hamming component codes.Based on the uniform interleaver assumption,a union bound analysis of the bit error probability was presented for ZS-GLDPC codes when Signal-to-Noise Ratio is high.Density evolution using the Gaussian Approximation was used to analyze the convergence thresholds of ZS-GLDPC codes.Simulation results show that the bit error rate of ZS-GLDPC codes is better than or close to LDPC codes and GLDPC codes with Hamming component codes for short and medium code length.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2011年第1期178-183,共6页
Acta Electronica Sinica
基金
国家杰出青年科学基金(No.60725105)
国家973重点基础研究发展规划(No.2009CB320404)
长江学者和创新团队发展计划(No.IRT0852)
高等学校创新引智计划(No.B08038)
国家863高技术研究发展计划(No.2007AA01Z288)
国家科技重大专项(No.2009zx03005-004)
关键词
广义低密度奇偶校验码
低密度生成矩阵码
级联码
迭代译码
之型码
generalized low-density parity-check(GLDPC) codes
low-density generator matrix(LDGM) codes
concatenated codes
iterative decoding
zigzag codes