Interference Alignment with Analog CSI Feedback

被引:7
|
作者
El Ayach, Omar [1 ]
Heath, Robert W., Jr. [1 ]
机构
[1] Univ Texas Austin, Dept Elect & Comp Engn, Austin, TX 78712 USA
来源
MILITARY COMMUNICATIONS CONFERENCE, 2010 (MILCOM 2010) | 2010年
关键词
CHANNEL STATE INFORMATION; SYSTEMS;
D O I
10.1109/MILCOM.2010.5680216
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Interference alignment has been used to derive and realize the maximum multiplexing gain of the MIMO interference channel. Interference alignment requires some form of channel state information at the transmitter. This paper proposes analog CSI feedback as an alternative to limited feedback or reciprocity based alignment. We show that the maximum degrees of freedom of the K-user interference channel are preserved with the suggested feedback strategy, and that the mean loss in sum rate incurred by imperfect CSI is bounded by a constant provided that the signal-to-noise ratio is comparable in both forward and reverse channels. Finally, demonstrate the performance of the proposed strategy through simulation.
引用
收藏
页码:1644 / 1648
页数:5
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