Performance of closed loop transmit diversity with feedback delay

被引：0

作者：

Raghothaman, B ^{[1
]}

Mandyam, G ^{[1
]}

Derryberry, RT ^{[1
]}

机构：

[1] Nokia Res Ctr, Irving, TX 75039 USA

来源：

CONFERENCE RECORD OF THE THIRTY-FOURTH ASILOMAR CONFERENCE ON SIGNALS, SYSTEMS & COMPUTERS | 2000年

关键词：

D O I：

暂无

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Closed loop multi-antenna diversity transmission methods are being considered for 3(rd) generation wireless standards. In these techniques, information about the downlink channel is fed back to the base station and utilized to provide diversity as well as antenna gain at low mobile velocities under flat fading conditions. The performance, however, drops at higher velocities, mainly due to the delay involved in the feedback of antenna weights. We analyze this behavior, with the aim of quantifying the degradation in average received signal power as a function of velocity. The two cases of complex weight feedback and pure phase feedback are considered. The analysis will help to determine a useful velocity range in which closed loop diversity is feasible.

引用

页码：102 / 105

页数：2

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