A Novel Energy Efficient Scheme With a Finite-Rate Feedback Channel

Author

Amin, Osama ; Bedeer, Ebrahim ; Ahmed, Mohamed Hossam ; Dobre, Octavia A.

Author_Institution

Fac. of Eng. & Appl. Sci., Memorial Univ. of Newfoundland, St. John´s, NL, Canada

Volume

3

Issue

5

fYear

2014

fDate

Oct. 2014

Firstpage

497

Lastpage

500

Abstract

In this letter, we propose an energy efficient communication scheme with a limited feedback rate for Rayleigh fading channels. First, we employ the available feedback words to quantize the channel-to-noise ratio (CNR) range and divide it into different regions. Then, we formulate the average energy efficiency (EE) for a given number of CNR regions using a fixed power and rate in each region. After that, we propose an offline optimization algorithm to compute the energy efficient CNR thresholds of each region and the associated transmission powers that maximize the EE. Finally, we evaluate the proposed scheme through simulations, by comparing the EE performance and effective achievable capacity against the case of perfect-CSI.

Keywords

Rayleigh channels; feedback; optimisation; telecommunication power management; CNR threshold; Rayleigh fading channels; channel-to-noise ratio; energy efficient communication scheme; finite-rate feedback channel; offline optimization algorithm; Fading; Linear programming; Optimization; Receivers; Transmitters; Wireless communication; Energy efficiency (EE); adaptive systems; finite-rate feedback; power allocation;

fLanguage

English

Journal_Title

Wireless Communications Letters, IEEE

Publisher

ieee

ISSN

2162-2337

Type

jour

DOI

10.1109/LWC.2014.2349002

Filename

6880309