MIMO系统中基于因子图的联合迭代检测和LDPC译码

摘要

本文提出了多输入多输出系统中频率选择性衰落信道下的一种联合迭代检测和LDPC译码的算法,采用因子图的模型将检测器和译码器融合到了一个框架中,通过检测器与译码器两个处理器内部及全局的信息混合调度改善系统性能.与MAP检测比,该算法以较低的复杂度获得良好的性能,因子图检测特有的并行调度在硬件快速实现上更具优势.%The paper propose a joint iterative detector and LDPC decoder algorithm in frequency selective multiple-input multiple-output system and combine the detector and decoder into a framework based on factor graph.The performance can be improved by scheduling the internal message and global message of the detector and the decoder.Compared with MAP detector,the proposed algorithm has good performance and the parallel schedule has more advantages in fast hardware implementations.