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MIMO-OFDM系统迭代球形译码检测算法

DOI: doi:10.3969/j.issn.1006-7043.2011.04.021

Keywords: 比特交织编码调制, 多输入多输出, 正交频分复用, 球形译码??

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Abstract:

在MIMO-OFDM信号检测中,应用迭代译码的比特交织编码调制(BICM??ID)可有效地在获得分集增益和编码增益的基础上提高检测精度.但检测复杂度会随星座点数与发射天线数指数倍增加,代价较高.为了避免迭代检测所增加的复杂度,用较小复杂度的MAX??LOG??MAP译码器来代替MAP译码器来进行卷积译码,且将MAP解调过程用改进的球形列表译码算法完成以进一步降低复杂度.仿真结果表明,与其他迭代译码方式相比,应用此迭代球形检测译码算法可以使迭代译码的复杂度显著降低,且可以随星座大小及发射天线数自适应地改变,具有较强的鲁棒性.

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