Achievable data rates and power allocation for frequency-selective fading relay channels with imperfect channel estimation

被引：0
作者：
Yanwu Ding
Murat Uysal
机构：
[1] Wichita State University,Department of Electrical Engineering and Computer Science
[2] Ozyegin University Istanbul,Faculty of Engineering
来源：
EURASIP Journal on Wireless Communications and Networking | / 2012卷
关键词：
Achievable rate; Amplify-and-forward relaying; Channel estimation; Power allocation; OFDM;
D O I：
暂无
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学科分类号：
摘要：
In this article, we investigate the information-theoretical performance of a cooperative orthogonal frequency division multiplexing (OFDM) system with imperfect channel estimation. Assuming the deployment of training-aided channel estimators, we derive a lower bound on the achievable rate for the cooperative OFDM system with amplify-and-forward relaying over frequency-selective Rayleigh fading channels. The bound is later utilized to allocate power among the training and data transmission phases. Numerical results demonstrate that the proposed power allocation scheme brings between 5 and 19% improvement depending on the level of signal-to-noise ratio and relay locations.
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