Title :
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
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;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2014.2372003
