A decentralized downlink beamforming algorithm for multicell processing

Conference paper

Le, T. and Nakhai, M. 2012. A decentralized downlink beamforming algorithm for multicell processing. IEEE Global Communications Conference (GLOBECOM 2012). Anaheim, CA, USA 03 - 07 Dec 2012 IEEE. pp. 3924-3929 https://doi.org/10.1109/GLOCOM.2012.6503729
TypeConference paper
TitleA decentralized downlink beamforming algorithm for multicell processing
AuthorsLe, T. and Nakhai, M.
Abstract

In this paper, we tackle the problem of intercell-interference in the absence of cooperation amongst base stations (BSs). The problem originates from the simultaneous transmissions of several BSs to their local users within their corresponding cells using the same frequency band. We propose a decentralized downlink beamforming scheme in cellular interference channels so that individual BSs can independently design their own beamforming vectors based on the locally attainable second order statistical channel state information at each BS. In this scheme, while each BS minimizes a combination of its total transmit power and the resulting total interference on the other vulnerable users of the adjacent cells, it assures that certain targeted signal-to-interference-plus-noise ratio (SINR) levels are achieved at its local users. Using the reciprocity of wireless network and the uplink-downlink duality, we develop a fast-converging iterative algorithm for downlink transmissions by distributed BSs. Finally, we derive a feasibility condition for the existence of a unique solution to the proposed optimization problem. This condition can be used to develop a scheduling algorithm for choosing a set of feasible users within each cell. Simulation results confirm the effectiveness of the proposed decentralized algorithm in closely following the performance curve of its centralized counterpart.

ConferenceIEEE Global Communications Conference (GLOBECOM 2012)
Page range3924-3929
Proceedings Title2012 IEEE Global Communications Conference (GLOBECOM)
SeriesIEEE Global Communications Conference
ISSN1930-529X
Electronic1930-529X
ISBN
Hardcover9781467309202
Electronic9781467309219
Electronic9781467309196
PublisherIEEE
Publication dates
Print03 Dec 2012
Online22 Apr 2013
Publication process dates
Deposited08 Jun 2015
Output statusPublished
Digital Object Identifier (DOI)https://doi.org/10.1109/GLOCOM.2012.6503729
Web of Science identifierWOS:000322375104047
Web address (URL) of conference proceedingshttps://ieeexplore.ieee.org/xpl/conhome/6490098/proceeding
LanguageEnglish
Book title2012 IEEE Global Communications Conference (GLOBECOM)
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