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Robust and power efficient interference management in downlink multi-cell networks

Research output: Chapter in Book/Report/Conference proceedingConference paper

Original languageEnglish
Title of host publication IEEE 24th International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC)
Subtitle of host publicationFundamentals and PHY Track
PublisherIEEE
Pages1097-1101
Number of pages5
DOIs
Published1 Dec 2013
Event2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2013 - London, United Kingdom
Duration: 8 Sep 201311 Sep 2013

Conference

Conference2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2013
CountryUnited Kingdom
CityLondon
Period8/09/201311/09/2013

Bibliographical note

© 2013 IEEE.

King's Authors

Abstract

In this paper, we focus on robust design of downlink beamforming vectors for multiple antenna base stations (BSs) in a multi-cell interference network. We formulate a robust optimization problem where an individual BS within a cell designs its beamforming vectors to minimize a combination of its sum-power, used for assuring a desired quality of service at its local users, and its aggregate induced interference on the users of the other cells, to balance inter-cell interference across the multiple cells. The proposed robust formulation uses spherical uncertainty sets to model imperfections in the second-order statistical channel knowledge between the BS and the users. To maintain tractability of the robust solutions, we derive an equivalent semidefinite programming (SDP) formulation that is convex under standard rank relaxation. The numerical results confirm the effectiveness of the proposed algorithm under various sizes of uncertainty set and the fact that the attained robust solutions always satisfy the rank constraint. 

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