Power Allocation for Amplify-and-Forward Relaying with Correlated Shadowing

被引：0
作者：
Liang Han
Shihai Shao
Ying Shen
Chaojin Qing
Youxi Tang
机构：
[1] University of Electronic Science and Technology of China,National Key Lab of Science and Technology on Communications
来源：
Wireless Personal Communications | 2014年 / 74卷
关键词：
Amplify-and-forward; Outage probability; Power allocation; Correlated shadowing;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Power allocation is a key technique to exploit the benefits of cooperative relaying. In this paper, we investigate the effect of shadowing on the power allocation of amplify-and-forward cooperative relaying systems. Considering the joint effects of path loss, correlated shadowing and flat Rayleigh fading, the approximate outage probability at high signal-to-noise ratio (SNR) is first derived. Then we solve the power allocation problem by minimizing the approximate outage probability subject to a total power constraint. It is shown by the analytical results that the correlation coefficients and the standard deviations of shadowing have significant impacts on the power allocation. The simulation results show that the proposed power allocation scheme yields about 2 dB SNR gain compared to the equal power allocation in the high SNR regime.
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页码：427 / 438
页数：11
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