| 分组衰落信道下LDPC的一种带信道估计的改进Belief-Propagation算法 |
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| 引用本文： | 邓建民, 尹长川, 纪红, 乐光新. 分组衰落信道下LDPC的一种带信道估计的改进Belief-Propagation算法[J]. 电子与信息学报, 2005, 27(4): 519-522. |
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| 作者姓名： | 邓建民 尹长川 纪红 乐光新 |
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| 作者单位： | 北京邮电大学电信工程学院,北京,100876;北京邮电大学电信工程学院,北京,100876;北京邮电大学电信工程学院,北京,100876;北京邮电大学电信工程学院,北京,100876 |
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| 基金项目： | 国家自然科学基金;国家自然科学基金 |
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| 摘 要： | 该文首先通过仿真证明了LDPC(Low Density Parity Check code)在分组衰落信道下,以通常的Belief-propagation算法译码,具有较好性能.然后基于算法的特殊迭代特性,提出分组衰落信道下,在每一迭代步骤中结合信道估计的改进的Belief-propagation算法.仿真证明,该算法可以有效地减少译码迭代次数.
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| 关 键 词： | LDPC 信道估计 改进的Belief-propagation算法 |
| 文章编号： | 1009-5896(2005)04-0519-04 |
| 收稿时间： | 2003-11-13 |
| 修稿时间： | 2003-11-13 |
An Improved Belief-Propagation Algorithm with Channel Estimation of LDPC under Block Fading Channels |
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| Deng Jian-min, Yin Chang-chuan, Ji Hong, Yue Guang-xin. An Improved Belief-Propagation Algorithm with Channel Estimation of LDPC under Block Fading Channels[J]. Journal of Electronics & Information Technology, 2005, 27(4): 519-522. |
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| Authors: | DENG Jian-min Yin Chang-chuan Ji Hong Yue Guang-xin |
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| Affiliation: | Telecom Eng. School Beijing Univ. of Posts and Telecom., Beijing 100876 China |
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| Abstract: | Firstly it is proved by simulation that the Low Density Parity Check(LDPC) code has sound performance under block fading channel when decoded by general belief-propagation algorithm. Then based on its special iterative nature, the improved belif-propagation algorithm is proposed under block fading channel with channel estimation in every iterative step. The simulation demonstrates that the proposed algorithm can effectively reduce the iterative times of decoding. |
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| Keywords: | LDPC |
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