User Selection Schemes for MIMO Broadcast Channels with Limited Feedback
User Selection Schemes for MIMO Broadcast Channels with Limited Feedback
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DOI：
10.1109/vetecs.2007.432
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发表时间：
2007-04
期刊：
影响因子：
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通讯作者：
M. Trivellato;F. Boccardi;F. Tosato
中科院分区：
文献类型：
--
作者：
M. Trivellato;F. Boccardi;F. Tosato
针对任意用户数量的MIMO高斯广播信道，提出了一种用户选择算法和支持反馈方案，该方案具有发射波束形成和发射机可用的有限信道状态信息（CSI）。该方法依赖于通过来自移动设备的适当的有限速率信道报告来估计发射机的用户信噪比（SINR）。基本原则是，只有当用户在增加吞吐量方面对系统有益时，才会依次添加用户。数值结果表明，与其他有限速率反馈方案相比，该方案的性能有所提高。
We propose a user selection algorithm and the supporting feedback scheme, for MIMO Gaussian broadcast channels with arbitrary number of users, transmit beamforming and limited channel state information (CSI) available at the transmitter. The method relies on estimation of the user signal-to-interference-plus-noise ratios (SINR's) at the transmitter, by means of an appropriate finite-rate channel report from the mobiles. The basic principle is that users are added successively only if they are beneficial to the system in terms of increased throughput. Numerical results show improved performance compared to other finite-rate feedback schemes.