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On the Relation between Energy Efficiency and Spectral Efficiency of Multiple-Antenna Systems

Jiang, J, Dianati, Mehrdad, Imran, Muhammad, Tafazolli, Rahim and Chen, Y (2013) On the Relation between Energy Efficiency and Spectral Efficiency of Multiple-Antenna Systems IEEE Transactions on Vehicular Technology, 62 (7). pp. 3463-3469.

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Motivated by increased interests in energy efficient communication systems, the relation between energy efficiency (EE) and spectral efficiency (SE) for multiple-input multipleoutput (MIMO) systems is investigated in this paper. To provide insight into the design of practical MIMO systems, we adopt a realistic power model, as well as consider both independent Rayleigh fading and semicorrelated fading channels. We derive a novel and closed-form upper bound for the system EE as a function of SE. This upper bound exhibits a great accuracy for a wide range of SE values, and thus can be utilized for explicitly assessing the influence of SE on EE, and analytically addressing the EE optimization problems. Using this tight EE upper bound, our analysis unfolds two EE optimization issues: Given the number of transmit and receive antennas, an optimum value of SE is derived such that the overall EE can be maximized; Given a specific value of SE, the optimal number of antennas is derived for maximizing the system EE.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering > Centre for Communication Systems Research
Authors :
Jiang, J
Chen, Y
Date : 18 March 2013
DOI : 10.1109/TVT.2013.2253141
Copyright Disclaimer : © 2013 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Uncontrolled Keywords : Energy efficiency, Spectral efficiency, Multipleantenna systems, Rayleigh fading channels, Energy efficiency optimization.
Depositing User : Symplectic Elements
Date Deposited : 19 Feb 2014 11:51
Last Modified : 16 Jan 2019 16:50

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