Energy-efficient power allocation for non-regenerative OFDM relay links

被引：0

作者：

YU Huan ^{[1
]}

QIN HaoHao ^{[1
]}

LI YunZhou ^{[1
]}

ZHAO YiFei ^{[1
]}

XU XiBin ^{[1
]}

WANG Jing ^{[1
]}

机构：

[1] State Key Laboratory on Microwave and Digital Communications, Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University

来源：

Science China(Information Sciences) | 2013年 / 56卷 / 02期

基金：

中国国家自然科学基金;

关键词：

energy efficiency; power allocation; OFDM; relay; cooperative communication;

D O I：

暂无

中图分类号：

TN919.3 [数据传输技术];

学科分类号：

0810 ; 081001 ;

摘要：

We consider a two-hop non-regenerative (amplify-and-forward) relay link with one source, one destination and one relay, in which orthogonal frequency division multiplexing (OFDM) is used. The power allocation (PA) to maximize the energy efficiency for the whole link is investigated under quality of service (Qos) require- ment and separate power constraints. An approximation method with low complexity is first proposed to convert the PA problem into a quasi-concave problem, which can obtain a tight lower bound in high SNR region. Furthermore, a more accurate approximation method with higher complexity is raised, which can approach the actual performance both in the low SNR and high SNR regions. We also introduce subcarrier pairing scheme to further enhance the energy efficiency for the link. Simulation results are shown to compare the performance of the two proposed methods.

引用

页码：57 / 64

页数：8

共 3 条

[1] On the optimal power allocation for nonregenerative OFDM relay links .2 I. Hammerstrom,A. Wittneben. Proc. IEEE International Conference on Communications (ICC) . 2006
[2] Fundamental trade-offs on green wireless networks .2 Y Chen,S Zhang,S Xu,G Li. IEEE Commun Mag . 2011
[3] Power allocation for regenerative relay channel with rayleigh fading .2 Zhang Q,Zhang J M,Shao C J,et al. Proceedings of IEEE Vehicular Technology Conference . 2004

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