| 摘要: |
| 为提高低密度奇偶校验（LDPC）码的低复杂度硬判决译码算法的性能，提出了一种改
进的比特翻转（BF）译码算法，在迭代时利用一个交替的门限模式对多个比特进行翻转，降
低了每次迭代时比特被错误翻转的概率，从而有效提高了译码性能。仿真结果表明，与BF算
法相比，该算法在保持低复杂度的基础上获得了更好的译码性能和更快的收敛速度。 |
| 关键词: 低密度奇偶校验码 比特翻转 迭代译码 |
| DOI： |
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| 基金项目:国家重点基础研究发展规划（973计划）项目（2012CB328300）；陕西省教育厅专项科研计划项目（11JK1007）；西安邮电学院青年教师基金项目（0001286） |
|
| An improved iterative bit-flipping decoding algorithm for low-density parity-check codes |
| LIU Yuan-hua,ZHANG Mei-ling |
| () |
| Abstract: |
| An improved iterative bit flipping(BF) algorithm adapted for decoding
low density parity check(LDPC) codes is proposed to improve the performance
of the hard decision BF decoding algorithm. The new algorithm uses an alternati
ng threshold pattern to determine the bits whether to be flipped or not, and the
flipping error probability is effectively decreased. Simulation results show t
hat compared with BF algorithm, the improved BF algorithm improves both the erro
r correction performance and the convergence speed while maintaining the low co
mputational complexity. |
| Key words: low density parity check code bit flipping iterative decoding |
