Memory-based opportunistic multi-user beamforming
Memory-based opportunistic multi-user beamforming
复制标题
DOI：
10.1109/isit.2005.1523578
复制
发表时间：
2005-10
期刊：
影响因子：
--
通讯作者：
M. Kountouris;D. Gesbert
中科院分区：
文献类型：
--
作者：
M. Kountouris;D. Gesbert
提出了一种在机会多用户波束形成中利用内存的方案。该方案建立在 M. Sharif 和 B. Hassibi（2005 年）在基于部分发射机信道状态信息 (CSIT) 的多用户下行链路前置和调度领域实现的最新进展的基础上。尽管 M. Sharif 和 B. Hassibi, 2005 中完成的前置和调度在统一预编码器集合中是最优的，但对于大量用户来说它只是渐近的。其次，该方案无法利用信道的潜在时间相关性。在本文中，我们展示了（1）利用发射机中的内存可以填补时间相关信道的固定（甚至少量）用户数量的最优性差距，（2）如何扩展此类方案以在比例公平意义上考虑公平性
A scheme exploiting memory in opportunistic multiuser beamforming is proposed. The scheme builds on recent advances realized in M. Sharif and B. Hassibi, 2005, in the area of multi-user downlink preceding and scheduling based on partial transmitter channel state information (CSIT). Although the preceding and scheduling done in M. Sharif and B. Hassibi, 2005 is optimal within the set of unitary precoders, it is only so asymptotically for large number of users. Secondly, this scheme is unable to exploit potential time correlation of the channel. In this paper, we show (1) that exploiting memory in the transmitter allows to fill the gap to optimality for fixed (even low) number of users for time correlated channels, (2) how such schemes can be extended to take fairness into account in the proportional fair sense