摘要
低密度奇偶校验码(LDPC)的比特翻转译码算法(BF)复杂度低,实用性强。在研究了简单比特翻转法(BF)、加权比特翻转法(WBF)和可靠性比率加权比特翻转法(RRWBF)后,提出一种综合考虑符号绝对值和可靠性比率的BF译码算法。该算法每次可迭代翻转多个比特,仿真结果表明,与RRWBF算法相比,改进算法在信噪比为5 dB时,误码率由10-3数量级提高到10-4。
The bit-flipping （BF） algorithm of low density parity check （LDPC） code has low computation complexity and great practicability. On the basis of studying simple BF, WBF and RRWBF, an improved BF algorithm is proposed on considering the reliability ratio and absolute value of symbol. The proposed algorithm flips more than one bit in each iteration. Simulation results indicate that compared with RRWBF, the error rate of the proposed algorithm with 5 dB is improved from 10^-3 to 10^-4.
出处
《现代电子技术》
2011年第3期11-13,16,共4页
Modern Electronics Technique
基金
毫米波国家重点实验室资助项目(K200819)
关键词
LDPC
符号绝对值
可靠性比率
多比特翻转
迭代译码
LDPC
absolute value of symbol
reliability ratio
multi-bit flipping
iteration decoding
