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LDPC编码超宽带系统的迭代多用户检测算法

DOI: 10.3969/j.issn.1006-7043.2009.05.019

Keywords: 低密度奇偶校验码 超宽带 多用户检测 迭代原理

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Abstract:

为了有效抑制多址干扰,提出了一种低复杂度的LDPC编码的超宽带系统的迭代多用户检测算法.所提出的迭代接收结构有3个级:脉冲检测器、符号检测器和信道译码器,每一级输出的软信息作为下一次迭代的先验信息.采用简化的超宽带离散时间信号模型,使接收机复杂度大大降低.仿真结果表明,所提出的算法明显优于传统的准多用户检测算法,并且经过少数次的迭代,即可有效抑制多址干扰,达到单用户的性能.

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