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2种高性能的空频OFDM检测器

DOI: 10.13190/jbupt.200604.10.lixj, PP. 10-13

Keywords: 空频编码,正交频分复用,串行迭代线性最小均方误差估计,符号检测器

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Abstract:

提出了两种高性能的串行迭代的基于线性最小均方误差(LMMSE)估计的空频正交频分复用(OFDM)检测器。第一种检测器利用了已调信号的有限字母特性,通过后验概率的计算更新先验信息;第二种方法结合了判决反馈技术。通过分析和仿真表明,所提的算法在可接受的复杂度下,相对于已有的干扰消除器有效地消除了空频OFDM系统在频率选择性多径信道下的误码平层。

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