Electromagnetic emission-aware schedulers for the uplink of OFDM wireless communication systems

Sambo, Y. A. , Al-Imari, M., Heliot, F. and Imran, M. A. (2017) Electromagnetic emission-aware schedulers for the uplink of OFDM wireless communication systems. IEEE Transactions on Vehicular Technology, 66(2), pp. 1313-1323. (doi:10.1109/TVT.2016.2558838)

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Abstract

The popularity and convergence of wireless communications have resulted in continuous network upgrades in order to support the increasing demand for bandwidth. However, given that wireless communication systems operate on radiofrequency waves, the health effects of electromagnetic emission from these systems are increasingly becoming a concern due to the ubiquity of mobile communication devices. In order to address these concerns, we propose two schemes (offline and online) for minimizing the EM emission of users in the uplink of OFDM systems, while maintaining an acceptable quality of service. We formulate our offline EM reduction scheme as a convex optimization problem and solve it through water-filling. This is based on the assumption that the long-term channel state information of all the users is known. Given that, in practice, long-term channel state information of all the users cannot always be available, we propose our online EM emission reduction scheme, which is based on minimizing the instantaneous transmit energy per bit of each user. Simulation results show that both our proposed schemes significantly minimize the EM emission when compared to the benchmark classic greedy spectral efficiency based scheme and an energy efficiency based scheme. Furthermore, our offline scheme proves to be very robust against channel prediction errors.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Sambo, Dr Yusuf Abdulrahm and Imran, Professor Muhammad
Authors: Sambo, Y. A., Al-Imari, M., Heliot, F., and Imran, M. A.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:IEEE Transactions on Vehicular Technology
Publisher:IEEE
ISSN:0018-9545
Published Online:27 April 2016
Copyright Holders:Copyright © 2016 IEEE
First Published:First published in IEEE Transactions on Vehicular Technology 66(2):1313-1323
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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