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电子学报  2007 

有限反馈MIMO系统中一种基于双码本的功率分配与预编码方案

, PP. 78-82

Keywords: 自适应调制,有限反馈,多输入多输出(MIMO),功率分配,预编码

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Abstract:

研究表明,有限反馈预编码能有效利用信道信息提高MIMO系统频谱效率,在此基础上,在发射端进行功率控制将使频谱效率得到进一步提升.为了最大化有限反馈MIMO系统的频谱效率,本文提出了一种基于自适应调制的功率分配与预编码方案.为了减少反馈量,该方案通过双码本方式来反馈预编码矩阵和功率控制矢量,并给出了一种基于K-均值聚类的功率码本设计方法.仿真结果表明,该方案的反馈信息量少,且获得了较好频谱性能.

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