Channel Estimation with Optimal Power Controls in Amplify-and-Forward Relay Networks

被引：2
|
作者：
Jo, Soon-Ki [1 ]
Choi, Jeong-Min [1 ]
Baek, Jong-Seob [2 ]
Seo, Jong-Soo [1 ]
机构：
[1] Yonsei Univ, Dept Elect & Elect Engn, Seoul 120749, South Korea
[2] LG Elect, CTO, Convergence Lab, Team Adv Technol & Syst, Seoul 137130, South Korea
来源：
IEEE WIRELESS COMMUNICATIONS LETTERS | 2013年 / 2卷 / 01期
关键词：
Amplify-and-forward relay; channel estimation; optimal power control;
D O I：
10.1109/WCL.2012.092612.120583
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
In this paper, we present a power control method of relay for improving a channel estimation performance in amplify-and-forward (AF) relay networks over frequency-selective fading channel. We first analyze a channel mean-square error (MSE) by imposing a power control effect on a simple (LS) channel estimation. Then, we find that there is a trade-off between the amplitude of power control and MSE performance. Moreover, we propose the optimal and suboptimal power control methods in order to resolve such a trade-off. Finally, the superiority of the proposed channel estimation with optimal power controls is verified through numerical simulations.
引用
收藏
页码：10 / 13
页数：4
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