Optimal transmit strategies in MIMO Ricean channels with MMSE receiver

被引：0

作者：

Jorswieck, EA ^{[1
]}

Sezgin, A ^{[1
]}

Boche, H ^{[1
]}

Costa, E ^{[1
]}

机构：

[1] Heinrich Hertz Inst Nachrichtentech Berlin GmbH, Fraunhofer Inst Telecommun, Broadband Mobile Comm Networks, D-10587 Berlin, Germany

来源：

VTC2004-FALL: 2004 IEEE 60TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-7: WIRELESS TECHNOLOGIES FOR GLOBAL SECURITY | 2004年

关键词：

D O I：

暂无

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

In this work, we study a MIMO system with MMSE receiver in a flat-fading environment. We assume that the receiver has perfect CSI and the transmitter knows only the mean channel matrix either by feedback or channel estimation. First, we derive the properties of the average normalized MSE and its dependence on the singular values of the mean component. Next, we show that the optimal transmit strategy is to transmit into direction of the eigenvectors of the squared mean component. In addition to this, we characterize the optimal power allocation using the necessary and sufficient optimality conditions. Furthermore, the optimal strategy for small SNR values is to perform beamforming, i.e. to transmit only in direction of the largest mean matrix eigenvalue.

引用

页码：3787 / 3791

页数：5

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