A Low-Complexity Energy-Efficient Power Allocation and Rate Adaptation Scheme for Relay-Assisted Systems

Author

Xiaoming Wang ; Fu-Chun Zheng ; Pengcheng Zhu ; Xiaohu You

Author_Institution

Nat. Mobile Commun. Res. Lab., Southeast Univ., Nanjing, China

Volume

19

Issue

1

fYear

2015

fDate

Jan. 2015

Firstpage

94

Lastpage

97

Abstract

In this letter, an energy-efficient power and rate adaptation algorithm for amplify-and-forward (AF) relay systems is studied with imperfect channel statement information (CSI) at transmitters. In the proposed scheme, energy efficiency (EE) is maximized under the maximum transmit power constraint, the minimum system data-rate constraint and the target packet outage probability constraint. In addition, to solve the EE maximization problem, we propose a low-complexity iterative algorithm. Numerical results illustrate the effectiveness of the proposed algorithm.

Keywords

amplify and forward communication; probability; relay networks (telecommunication); telecommunication power management; wireless channels; AF relay systems; CSI; amplify-and-forward relay systems; channel statement information; low complexity energy efficient power allocation; rate adaptation scheme; relay assisted systems; target packet outage probability constraint; Iterative methods; Optimization; Programming; Radio transmitters; Relays; Resource management; Wireless communication; Energy efficiency; amplify-and-forward; imperfect CSI; relay systems;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2014.2372003

Filename

6963309