Finite-SNR Diversity-Multiplexing Tradeoff Analysis of Relay Network with two Antennas at the Source in Rayleigh Fading Channels

被引：0
|
作者：
Fang, Wujiang [1 ]
Gao, Yuanyuan [1 ]
Xu, Kun [1 ]
Zang, Guozhen [1 ]
Jiang, Tianming [1 ]
机构：
[1] PLA Univ Sci & Technol, Inst Commun Engn, Nanjing 210007, Jiangsu, Peoples R China
来源：
2012 INTERNATIONAL CONFERENCE ON WIRELESS COMMUNICATIONS AND SIGNAL PROCESSING (WCSP 2012) | 2012年
关键词：
finite SNR diversity-multiplexing tradeoff; relay network; two antennas; time allocation; coded cooperation;
D O I：
暂无
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 analyze the diversity-multiplexing tradeoff (DMT) of a simple relay network model in cellular system. The relay network model consists of a two-antenna base station and single-antenna mobile terminals. Compared with most prior work, we put emphasis on DMT analysis at finite signal-to-noise ratio (SNR) in Rayleigh Fading Channels. Specifically, we first derive the closed-form expressions of the outage performance and the finite-SNR DMT for the system model. Then, we investigate the effect of time allocation among the source and the relay on the outage and DMT performance. Our results reveal that the conventional asymptotic SNR DMT significantly overestimates finite-SNR DMT in the practical SNRs. We also demonstrate that the finite-SNR DMT is equivalent to the conventional asymptotic DMT when the SNR approach infinity.
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页数：6
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