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Convex Transmit Beamforming for Downlink Multicasting to Multiple Co-Channel Groups
Technical University of Crete, Chania, Greece.
Technical University of Crete, Chania, Greece.
University of Minnesota, Minneapolis, USA.
2006 (English)In: Proceedings of the 31st IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2006, 973-976 p.Conference paper (Refereed)
Abstract [en]

We consider the problem of transmit beamforming to multiple cochannel multicast groups. Since the direct minimization of transmit power while guaranteeing a prescribed minimum signal to interference plus noise ratio (SINR) at each receiver is nonconvex and NP-hard, we present convex SDP relaxations of this problem and study when such relaxations are tight. Our results show that when the steering vectors for all receivers are of Vandermonde type (such as in the case of a uniform linear array and line-of-sight propagation), a globally optimum solution to the corresponding transmit beamforming problem can be obtained via an equivalent SDP reformulation. We also present various robust formulations for the problem of single-group multicasting, when the steering vectors are only approximately known. Simulation results are presented to illustrate the effectiveness of our SDP relaxations and reformulations.

Place, publisher, year, edition, pages
2006. 973-976 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-67051DOI: 10.1109/ICASSP.2006.1661440ISBN: 1-4244-0469-XOAI: oai:DiVA.org:liu-67051DiVA: diva2:406340
Note
©2006 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. Eleftherios Karipidis, Nicholas Sidiropoulos and Zhi-Quan Luo, Convex Transmit Beamforming for Downlink Multicasting to Multiple Co-Channel Groups, 2006, Proceedings of the 31st IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 973-976. http://dx.doi.org/10.1109/ICASSP.2006.1661440 Available from: 2011-03-25 Created: 2011-03-25 Last updated: 2011-04-06

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