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User Scheduling for Cooperative Base Station Transmission Exploiting Channel Asymmetry
KTH, School of Electrical Engineering (EES), Signal Processing.ORCID iD: 0000-0002-3599-5584
2013 (English)In: IEEE Transactions on Communications, ISSN 0090-6778, E-ISSN 1558-0857, Vol. 61, no 4, 1426-1435 p.Article in journal (Refereed) Published
Abstract [en]

We study low-signalling overhead scheduling for downlink coordinated multi-point (CoMP) transmission with multi-antenna base stations (BSs) and single-antenna users. By exploiting the asymmetric channel feature, i.e., the pathloss differences towards different BSs, we derive a metric to judge orthogonality among users only using their average channel gains, based on which we propose a semi-orthogonal scheduler that can be applied in a two-stage transmission strategy. Simulation results demonstrate that the proposed scheduler performs close to the semi-orthogonal scheduler with full channel information, especially when each BS is with more antennas and the cell-edge region is large. Compared with other overhead reduction strategies, the proposed scheduler requires much less training overhead to achieve the same cell-average data rate.

Place, publisher, year, edition, pages
2013. Vol. 61, no 4, 1426-1435 p.
Keyword [en]
Coordinated multi-point (CoMP), user scheduling, low overhead, channel asymmetry
National Category
Communication Systems
URN: urn:nbn:se:kth:diva-124059DOI: 10.1109/TCOMM.2013.020413.110188ISI: 000318998100021ScopusID: 2-s2.0-84877922904OAI: diva2:633094

QC 20130626

Available from: 2013-06-26 Created: 2013-06-25 Last updated: 2013-06-26Bibliographically approved

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