| 改进型并行比特翻转算法(英文) |
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| 引用本文： | 刘晓健,赵春明,吴晓富.改进型并行比特翻转算法(英文)[J].东南大学学报,2009,25(4):423-426. |
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| 作者姓名： | 刘晓健 赵春明 吴晓富 |
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| 作者单位： | 东南大学移动通信国家重点实验室,南京,210096 |
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| 基金项目： | The National High Technology Research and Development Program of China (863Program) ( No2009AA01Z235,2006AA01Z263); the Research Fund of the National Mobile Communications Research Laboratory of Southeast University(No2008A10) |
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| 摘 要： | 提出一种改进的并行比特翻转算法. 为了加快校验节点和变量节点之间的信息传递速率, 算法中的比特翻转及校验和更新2个步骤采用并行化处理. 仿真结果表明, 改进后的算法相对于原有的并行比特翻转算法在误帧率性能上能够取得0.1～0.3 dB的增益. 同时, 改进算法在译码吞吐率的性能上也有所改善. 此外, 还讨论了翻转门限的选择方法, 这些门限决定了每次迭代中哪些比特需要被翻转. 通过选择合适的翻转门限, 可使错误的比特尽量多地被翻转, 并避免翻转正确的比特. 该改进算法比较适用于对具有准循环结构的LDPC码进行译码.
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| 关 键 词： | 低密度奇偶校验(LDPC) 并行比特翻转 改进的权重型比特翻转算法 校验和加权的权重型比特翻转算法 |
Improved parallel weighted bit-flipping algorithm |
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| Liu Xiaojian Zhao Chunming Wu Xiaofu.Improved parallel weighted bit-flipping algorithm[J].Journal of Southeast University(English Edition),2009,25(4):423-426. |
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| Authors: | Liu Xiaojian Zhao Chunming Wu Xiaofu |
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| Institution: | Liu Xiaojian Zhao Chunming Wu Xiaofu(National Mobile Communications Research Laboratory,Southeast University,Nanjing 210096,China) |
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| Abstract: | An improved parallel weighted bit-flipping(PWBF)algorithm is presented. To accelerate the information exchanges between check nodes and variable nodes,the bit-flipping step and the check node updating step of the original algorithm are parallelized. The simulation experiments demonstrate that the improved PWBF algorithm provides about 0.1 to 0.3 dB coding gain over the original PWBF algorithm. And the improved algorithm achieves a higher convergence rate. The choice of the threshold is also discussed,which ... |
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| Keywords: | low-density parity-check(LDPC) parallel weighted bit-flipping(PWBF) improved modified weighted bit-flipping(IMWBF) algorithm weighted-sum weighted bit-flipping(WSWBF) algorithm |
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