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Journal of Computer Networks and Communications
Volume 2013 (2013), Article ID 794202, 15 pages
http://dx.doi.org/10.1155/2013/794202
Research Article

Equalizer's Use Limitation for Complexity Reduction in a Green Radio Receiver

1IETR, Supélec, Campus de Rennes Avenue de la Boulaie, CS 47601, 35576 Cesson-Sévigné Cedex, France
2SUPCOM, University of Carthage, Cité Technologique des Communications, El Ghazala 2083 Tunis, Tunisia

Received 15 June 2012; Accepted 22 November 2012

Academic Editor: Lingjia Liu

Copyright © 2013 Salma Bourbia et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This work is about reducing energy consumption in the receiver chain by limiting the use of the equalizer. It is to make the radio receiver aware of its environment and able to take decision to turn on or off the equalizer according to its necessity or not. When the equalizer is off, the computational complexity is reduced and the rate of reduction depends on the percentage of time during which this component is disabled. In order to achieve this scenario of adapting the use of the equalizer, we need to develop a decision-making technique that provides the receiver with the capacities of awareness and adaptability to the state of its environment. For this, we improve a technique based on a statistical modeling of the environment by defining two metrics as channel quality indicators to evaluate the effect of the intersymbol interferences and the channel fading. The statistical modeling technique allows to take into account the impact of the uncertainties of the estimated metrics on the decision making.