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Distributed Multicell Beamforming Design Approaching Pareto Boundary with Max-Min Fairness
KTH, School of Electrical Engineering (EES), Signal Processing. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
University of Luxembourg.
KTH, School of Electrical Engineering (EES), Signal Processing. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0002-3599-5584
University College London.
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2012 (English)In: IEEE Transactions on Wireless Communications, ISSN 1536-1276, E-ISSN 1558-2248, Vol. 11, no 8, 2921-2933 p.Article in journal (Refereed) Published
Abstract [en]

This paper addresses coordinated downlink beamforming optimization in multicell time division duplex (TDD) systems where a small number of parameters are exchanged between cells but with no data sharing. With the goal to reach the point on the Pareto boundary with max-min rate fairness, we first develop a two-step centralized optimization algorithm to design the joint beamforming vectors. This algorithm can achieve a further sum-rate improvement over the max-min optimal performance, and is shown to guarantee max-min Pareto optimality for scenarios with two base stations (BSs) each serving a single user. To realize a distributed solution with limited intercell communication, we then propose an iterative algorithm by exploiting an approximate uplink-downlink duality, in which only a small number of positive scalars are shared between cells in each iteration. Simulation results show that the proposed distributed solution achieves a fairness rate performance close to the centralized algorithm while it has a better sum-rate performance, and demonstrates a better tradeoff between sum-rate and fairness than the Nash Bargaining solution especially at high signal-to-noise ratio.

Place, publisher, year, edition, pages
2012. Vol. 11, no 8, 2921-2933 p.
Keyword [en]
Distributed processing, multicell downlink beamforming, Pareto boundary, uplink-downlink duality
National Category
Signal Processing
URN: urn:nbn:se:kth:diva-102203DOI: 10.1109/TWC.2012.061912.111751ISI: 000307904600024ScopusID: 2-s2.0-84865351166OAI: diva2:551477
ICT - The Next Generation

QC 20120928

Available from: 2012-09-11 Created: 2012-09-11 Last updated: 2013-04-11Bibliographically approved

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