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多用户正交频分多址系统扇区间空域干扰协调

DOI: 10.13190/jbupt.201105.119.zhout, PP. 119-123

Keywords: 正交频分多址,多用户,最小均方误差,干扰协调

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Abstract:

针对多用户正交频分多址系统,提出了一种改进的下行空域干扰协调方案,该方案利用最小均方误差预编码来消除扇区间的同频干扰,改善边缘用户性能,并将最大化信号强度与最小化干扰泄露这2个目标函数分离到不同的资源上进行优化,简化了发射预编码矩阵的设计.系统级仿真结果表明,在发射端获得完整信道状态信息时,空域干扰协调方案可以减轻扇区间干扰,而并不引入扇区总吞吐量的损失.在码本大小、反馈粒度引起的信道状态信息不完全时,所提方案仍具有很好的性能增益.

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