摘要
低密度奇偶校验(LDPC)码是一种线性分组码,其纠错能力可以接近香农极限。针对LDPC码的编译码问题,分析了校验矩阵的构造方法。给出了LDPC码的编码算法以及算法的实现结构。分析了基于软判决的置信传播(BP)译码算法,并给出了可以进一步降低计算复杂度的简化译码方法。通过仿真对比了不同的译码算法在高斯信道下的译码性能。
The Low Density Parity Check Code（LDPC） is a kind of linear block code. The method for construction of parity-check matrix of LDPC is analyzed in view of coding and decoding of LDPC. The coding algorithm of LDPC and its implementation structure are proposed. The belief propagation（BP） algorithm based on soft decision decoding is analyzed,and a simplified decoding method with re- duced computational complexity is also given. The simulation results show the performance comparison between different decoding algo- rithms in Gaussian channel.
出处
《无线电工程》
2012年第10期8-9,26,共3页
Radio Engineering
关键词
纠错码
低密度奇偶校验码
校验矩阵
置信传播算法
error-correction code
low-density parity-check code
parity-check matrix
belief propagation algorithm
