On the sensitivity of transmit wiener filtering for broadcast channels with respect to channel estimation errors

被引：0
|
作者：
Tsipouridou, Despoina [1 ]
Liavas, Athanasios P. [1 ]
机构：
[1] Tech Univ Crete, Dept Elect & Comp Engn, Kounoupidiana 73100, Chania, Greece
来源：
2007 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, VOL III, PTS 1-3, PROCEEDINGS | 2007年
关键词：
MIMO systems; broadcast channels; preequalization; Wiener filtering;
D O I：
暂无
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
We consider the behavior of the transmit Wiener filter for broadcast channels with non-cooperating users under channel uncertainties. We derive a second-order approximation to the excess mean-square error (EMSE) induced by using a channel estimate as if it were the true channel. In the high SNR cases, we develop a simple approximation to the EMSE. It turns out that the EMSE is proportional to the minimum mean square error with the proportionality factor determined by the total transmit power and the length of the training block.
引用
收藏
页码：797 / +
页数：2
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