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Beamforming and Power Allocation Designs for Energy Efficiency Maximization in MISO Distributed Antenna Systems

Authors
Kim, HeejinPark, EunsungPark, HaewookLee, Inkyu
Issue Date
11월-2013
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Keywords
Energy efficiency; distributed antenna systems
Citation
IEEE COMMUNICATIONS LETTERS, v.17, no.11, pp.2100 - 2103
Indexed
SCIE
SCOPUS
Journal Title
IEEE COMMUNICATIONS LETTERS
Volume
17
Number
11
Start Page
2100
End Page
2103
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/101699
DOI
10.1109/LCOMM.2013.100713.131715
ISSN
1089-7798
Abstract
In this paper, we present a beamforming and power allocation algorithm for a downlink multiple-input single-output distributed antenna system which maximizes energy efficiency (EE). To reduce the computational complexity of conventional joint optimization approaches relying on an iterative method, we propose a near optimal scheme based on a closed-form solution. Employing the decomposition property of the joint optimization problem, the EE problem is solved in two steps. First, we determine the beamforming strategy for the EE maximization exposing the structure of beamforming vectors. Then, the optimal power allocation is presented as a closed-form solution by solving Karush-Kuhn-Tucker conditions. Through numerical simulations, we confirm that the proposed solution shows the performance almost identical to the jointly optimum method with much reduced complexity.
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공과대학 (전기전자공학부)
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