Orthogonal Space-Time Block Codes with Feedback

被引：0
作者：
Girish Ganesan
Petre Stoica
Erik G. Larsson
机构：
[1] Uppsala University,Department of Systems and Control
来源：
Wireless Personal Communications | 2004年 / 28卷
关键词：
space-time block codes; orthogonal designs; channel feedback; diversity;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In this paper we consider how Orthogonal Space-Time Block Codes (OSTBC) can be used in the presence of feedback from the receiver to the transmitter. First, we survey how some of the feedback techniques for AWGN channels with fading can be applied to OSTBC. Then we consider a simple scheme with diagonal weighting. The optimal diagonal weighting matrix, which minimizes the probability of error, is derived. The optimal weights depend on the channel and, hence, a feedback becomes necessary. However, the required feedback can be accomplished using log2 (nt) bits, where nt is the number of transmit antennas. Simulations show that relatively significant gains can be achieved with the diagonal weighting scheme.
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页码：287 / 312
页数：25
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