MIMO广播系统中的用户丢弃准则  

User Rejection Criterion Under MIMO Broadcast System

作　　者：程铁铮[1] 袁超伟[1] 解芳[1] 

机构地区：[1]北京邮电大学信息与通信工程学院,北京100876

出　　处：《北京邮电大学学报》2009年第3期27-31,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(60672132;60872149)

摘　　要：针对多输入多输出(MIMO)下行系统中基于迫零波束成形(ZFBF)的多用户贪婪选择算法复杂度高的问题,给出了一个用户丢弃准则.采用该准则的改进算法相比已有算法不仅性能上几乎没有任何损失,而且能显著减少每次进行用户选择时所需考察的备选用户数,从而降低计算复杂度.仿真结果表明,当信噪比较低时,采用该用户丢弃准则使得计算复杂度的下降超过50%.A user rejection criterion is proposed for the zero-forcing beamforming（ZFBF） based greedy multi-user selection algorithm in multi-input multi-output（MIMO） downlink system. As compared to the already published algorithms, the improved one which uses the user rejection criterion has nearly no performance loss and reduces the number of candidate user set in every selection step significantly. Simulations show that the user rejection criterion can lower down the computation complexity by more than 50 % when the signal to noise ratio is relatively low.

关 键 词：多输入多输出 迫零波束成形 用户丢弃准则 多用户选择 

分 类 号：TN911.22[电子电信—通信与信息系统]