适用于LDPC码的新颖自适应联合加权比特翻转译码算法

发布时间：2018-06-06 19:34

本文选题：加权比特翻转译码算法 + 迭代译码　；参考：《重庆邮电大学学报(自然科学版)》2015年06期

【摘要】：针对低密度奇偶校验(low-density parity-check,LDPC)码采用单比特翻转算法译码可能出现比特循环翻转现象而导致译码收敛速度缓慢的问题,提出一种适用于LDPC码的新颖自适应联合加权比特翻转(self-adaption combined weighted bit-flipping,SCWBF)译码算法。该SCWBF算法结合了能高效实现的可靠率加权比特翻转(implementation-efficient reliability ratio based weighted bit-flipping,IRRWBF)算法与低复杂度加权比特翻转(low complexity weighted bit-flipping,LCWBF)算法的优点,在每次迭代过程中,能自适应翻转单比特或多比特,从而避免了单比特翻转算法在译码过程中产生的同一比特循环翻转现象。仿真结果表明,与加权比特翻转(weighted bit-flipping,WBF)算法、IRRWBF算法以及联合改进加权比特翻转(combined modified weighted bit-flipping decoding,CMWBF)算法相比,提出的SCWBF译码算法加快了LDPC码的译码速度,并且误码性能也得到明显改善。
[Abstract]:For low-density parity-check LDPC (LDPC) codes with low-density parity-check (LDPC) codes, the problem that the decoding of low-density parity-check LDPC codes with single-bit flipping algorithm may occur the phenomenon of bit cycle reversal may lead to the slow convergence rate of decoding. A novel adaptive combined weighted bit-flipping SCWBF decoding algorithm for LDPCs is proposed. The SCWBF algorithm combines the advantages of the reliability weighted bit flipping implementation-coefficient reliability ratio based weighted bit-flippingIRRWBFalgorithm and the low-complexity weighted bit flipping complexity weighted bit-flippingLCWBFFFalgorithm. During each iteration, the SCWBF algorithm can turn over one or more bits adaptively. Thus, the same bit cyclic flip in the decoding process of single bit flipping algorithm is avoided. The simulation results show that compared with the weighted bit-flippingWBF (weighted bit-flippingWBF) algorithm and the combined modified weighted bit-flipping decoding (CMWBF) algorithm, the proposed SCWBF decoding algorithm accelerates the decoding speed of LDPCs, and the performance of error codes is improved obviously.
【作者单位】：重庆邮电大学光通信与网络重点实验室;
【基金】：国家自然科学基金(61472464) 重庆市基础与前沿研究计划项目(cstc2013jcyj A40017,cstc2015jcyj A0554) 重庆邮电大学(重庆市)研究生科研创新项目(CYS14144)~~
【分类号】：TN911.22

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