Linear precoding via conic optimization for fixed MIMO receivers

被引:715
作者
Wiesel, A [1 ]
Eldar, YC [1 ]
Shamai, SS [1 ]
机构
[1] Technion Israel Inst Technol, IL-32000 Haifa, Israel
关键词
linear precoding; multiple-input-multiple-output (MIMO) systems; optimization methods;
D O I
10.1109/TSP.2005.861073
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
In this paper, the problem of designing linear precoders for fixed multiple-input-multiple-output (MIMO) receivers is considered. Two different design criteria are considered. In the first, the transmitted power is minimized subject to signal-to-interference-plus-noise-ratio (SINR) constraints. In the second, the worst case SINR is maximized subject to a power constraint. It is shown that both problems can be solved using standard conic optimization packages. In addition, conditions are developed for the optimal precoder for both of these problems, and two simple fixed-point iterations are proposed to find the solutions that satisfy these conditions. The relation to the well-known uplink-downlink duality in the context of joint transmit beamforming and power control is also explored. The proposed precoder design is general, and as a special case, it solves the transmit rank-one beamforming problem. Simulation results in a multiuser system show that the resulting precoders can significantly outperform existing linear precoders.
引用
收藏
页码:161 / 176
页数:16
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