分组衰落信道下LDPC的一种带信道估计的改进Belief-Propagation算法
An Improved Belief-Propagation Algorithm with Channel Estimation of LDPC under Block Fading Channels
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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.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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