DocumentCode :
2367229
Title :
Coordinated max-min fair port selection in a multi-cell distributed antenna system using semidefinite relaxation
Author :
Ahmad, Talha ; Gohary, Ramy ; Yanikomeroglu, Halim ; Ai-Ahmadi, S. ; Boudreau, Gary
Author_Institution :
Dept. of Syst. & Comput. Eng., Carleton Univ., Ottawa, ON, Canada
fYear :
2012
fDate :
10-15 June 2012
Firstpage :
3616
Lastpage :
3620
Abstract :
We consider the downlink of a cellular system in which each base station (BS) has multiple distributed antenna ports that are geographically dispersed over the cell. The goal of the BSs is to improve cell-edge performance by selecting the subset of ports that maximizes the minimum signal-to-interference-plus-noise ratio of the user terminals in a coordinated manner. This problem is cast as a binary-constrained optimization problem, which is known to be NP-hard. To circumvent this difficulty, the semidefinite relaxation technique is used to efficiently generate Gaussian distributed vectors. Simulation results show that rounding a relatively small number of these vectors yields close-to-optimal solutions of the original problem.
Keywords :
Gaussian distribution; antennas; cellular radio; optimisation; radiofrequency interference; BS; Gaussian distributed vectors; NP-hard problems; base station; binary-constrained optimization problem; cell-edge performance improvement; cellular system; coordinated max-min fair port selection; multicell distributed antenna system; semidefinite relaxation technique; signal-to-interference-plus-noise ratio; Antenna arrays; Interference; Optimization; Signal to noise ratio; Vectors; Distributed antenna systems; coordinated transmission; port selection; randomization; semidefinite relaxation;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications (ICC), 2012 IEEE International Conference on
Conference_Location :
Ottawa, ON
ISSN :
1550-3607
Print_ISBN :
978-1-4577-2052-9
Electronic_ISBN :
1550-3607
Type :
conf
DOI :
10.1109/ICC.2012.6363886
Filename :
6363886
Link To Document :
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