On the Diversity Gain in Cooperative Relaying Channels with Imperfect CSIT

被引：40

作者：

Zhang, Xiao Juan ^{[1
]}

Gong, Yi ^{[1
]}

Ben Letaief, Khaled ^{[2
]}

机构：

[1] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore

[2] Hong Kong Univ Sci & Technol, Dept Elect & Comp Engn, Hong Kong, Hong Kong, Peoples R China

来源：

IEEE TRANSACTIONS ON COMMUNICATIONS | 2010年 / 58卷 / 04期

关键词：

Diversity; spatial multiplexing; relaying channel; diversity and multiplexing tradeoff; channel state information; MULTIPLEXING TRADEOFF; FUNDAMENTAL TRADEOFF; POWER ALLOCATION;

D O I：

10.1109/TCOMM.2010.04.090177

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, we investigate the impact of imperfect channel state information at the transmitters (CSIT) on the achievable diversity gain in a cooperative relaying channel with multiple destination antennas, where the CSIT comes from channel estimation at the transmitters. Both decode-and-forward (DF) and amplify-and-forward (AF) relaying protocols are considered. We show that transmit power control based on the imperfect CSIT significantly improves the achievable diversity gain. The diversity and multiplexing tradeoff (DMT) as a function of the CSIT quality of the source-relay link, source-destination link and relay-destination link is derived for each of the considered relaying schemes. An upper bound on the DMT of the relaying channel is also provided.

引用

页码：1273 / 1279

页数：7

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