Distributed Multicell Beamforming With Limited Intercell Coordination
2011 (English)In: IEEE Transactions on Signal Processing, ISSN 1053-587X, E-ISSN 1941-0476, Vol. 59, no 2, 728-738 p.Article in journal (Refereed) Published
This paper studies distributed optimization schemes for multicell joint beamforming and power allocation in time-division-duplex (TDD) multicell downlink systems where only limited-capacity intercell information exchange is permitted. With an aim to maximize the worst-user signal-to-interference-and-noise ratio (SINR), we devise a hierarchical iterative algorithm to optimize downlink beamforming and intercell power allocation jointly in a distributed manner. The proposed scheme is proved to converge to the global optimum. For fast convergence and to reduce the burden of intercell parameter exchange, we further propose to exploit previous iterations adaptively. Results illustrate that the proposed scheme can achieve near-optimal performance even with a few iterations, hence providing a good tradeoff between performance and backhaul consumption. The performance under quantized parameter exchange is also examined.
Place, publisher, year, edition, pages
2011. Vol. 59, no 2, 728-738 p.
Limited capacity backhauling, multicell beamforming, uplink-downlink duality
Research subject SRA - ICT
IdentifiersURN: urn:nbn:se:kth:diva-31342DOI: 10.1109/TSP.2010.2089621ISI: 000286111100021ScopusID: 2-s2.0-78651351019OAI: oai:DiVA.org:kth-31342DiVA: diva2:404487
FunderEU, FP7, Seventh Framework ProgrammeICT - The Next Generation
QC 201103172011-03-172011-03-142011-11-29Bibliographically approved