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Performance evaluation of coordinated multi-point transmission schemes with predicted CSI
Dept of Signals and Systems, Chalmers Tekniska Universitet, Göteborg.
Dept of Signals and Systems, Chalmers Tekniska Universitet, Göteborg.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Signals and Systems Group.
Dept of Signals and Systems, Chalmers Tekniska Universitet, Göteborg.
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2012 (English)In: IEEE Conference on Personal, Indoor and Mobile Radio Communications, PIMRC, Sydney, Australien, 2012, 1055-1060 p.Conference paper, Published paper (Refereed)
Abstract [en]

Coordinated multi-point (CoMP) transmission is considered as an efficient technique to improve cell-edge performance as well as system spectrum efficiency. In CoMP-enabled systems, a cluster of coordinated base stations (BSs) are typically assumed to be connected to a control unit (CU) via backhaul links, and the provided performance gain relies heavily on the quality of the channel state information (CSI) available at the CU side. In this paper, we consider the downlink of a CoMP cluster and compare three different CoMP transmission schemes: zero-forcing coherent joint transmission, non-coherent joint transmission and coordinated scheduling. Moreover, for each of the analyzed schemes, the performance in terms of average sum rate of the CoMP cluster is studied with predicted CSI, considering the effects of the feedback and backhaul latency, as well as the user mobility. Compared to zero-forcing coherent joint transmission, we show that non-coherent joint transmission and coordinated scheduling are more robust to channel uncertainty. In addition, depending on the latency, user mobility and user locations, different schemes would achieve the highest average sum rate performance. Hence, a system could switch between the transmission schemes to improve the sum rate.

Place, publisher, year, edition, pages
2012. 1055-1060 p.
National Category
Signal Processing
Research subject
Electrical Engineering with specialization in Signal Processing
Identifiers
URN: urn:nbn:se:uu:diva-181050DOI: 10.1109/PIMRC.2012.6362501OAI: oai:DiVA.org:uu-181050DiVA: diva2:552790
Conference
23rd International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC, Sydney, Australien.
Available from: 2012-09-17 Created: 2012-09-17 Last updated: 2013-02-25Bibliographically approved

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Apelfröjd, RikkeSternad, Mikael

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