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CDMA系统中MAP迭代多码检测技术的研究

, PP. 59-63

Keywords: 迭代多码检测,软信息,迭代增益,单码传输

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Abstract:

给出了多径衰落信道下一种与前向纠错码相结合的迭代多码检测接收机,它基于最大后验概率准则联合检测多个码字所承载的信息,并与FEC(前向纠错编码)译码器相互传递软信息,重复多次进行迭代检测。在QPSK(四相频移键控)调制方式下通过LAS-CDMA(大区制同步码分多址)系统的仿真,表明所提出的迭代多码检测接收机即使在高维调制方式下依然可以获得显著的迭代增益,并且在迭代一定次数之后可以达到单码传输的性能。

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