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Impact of Channel Asymmetry on Base Station Cooperative Transmission with Limited Feedback
Beihang University (BUAA). (School of Electronics and Information Engineering)
Beihang University (BUAA). (School of Electronics and Information Engineering)
KTH, School of Electrical Engineering (EES), Signal Processing. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0002-3599-5584
2011 (English)In: 2011 IEEE Vehicular Technology Conference (VTC Fall), 2011Conference paper (Refereed)
Abstract [en]

To exploit the full benefit of base station (BS) cooperative transmission, also known as coordinated multi-point (CoMP) transmission, large amount of feedback is required to gather the channel information. In this paper, we analyze the impact of channel asymmetry, which is inherent in CoMP systems, on downlink coherent BS cooperative transmission using zero-forcing beamforming with limited feedback. Per-cell quantization of multicell channels is considered, which quantizes the local channel and cross channels separately and is more feasible in practice. We analyze the per-user rate of limited feedback multi-user CoMP systems, and provide approximate expressions for both the inter-cell and intra-cell residual multi-user interference introduced by the quantization errors. When the desired user is at the cell center, the former is weak, but the latter is strong and depends not only on the signal to noise ratio but also on the location of its co-scheduled users. Simulation results validate our theoretical analysis.

Place, publisher, year, edition, pages
, IEEE VTS Vehicular Technology Conference Proceedings, ISSN 1090-3038
National Category
Signal Processing
Research subject
URN: urn:nbn:se:kth:diva-138006DOI: 10.1109/VETECF.2011.6093058ISI: 000298891500246ScopusID: 2-s2.0-83755171740ISBN: 978-1-4244-8327-3OAI: diva2:680193
IEEE 74th Vehicular Technology Conference, VTC Fall 2011; San Francisco, CA; United States; 5 September 2011 through 8 September 2011

QC 20150416

Available from: 2013-12-17 Created: 2013-12-17 Last updated: 2015-04-16Bibliographically approved

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Bengtsson, Mats
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Signal ProcessingACCESS Linnaeus Centre
Signal Processing

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ReferencesLink to record
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