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Blind Pilot Decontamination
Norwegian University of Science and Technology, Department of Electronics and Telecommunications.
KTH, School of Electrical Engineering (EES), Communication Theory. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
Institute Eurecom, Mobile Communications department .
2013 (English)In: International ITG Workshop on Smart Antennas (WSA 2013), VDE Verlag GmbH, 2013Conference paper (Refereed)
Abstract [en]

We propose a nonlinear channel estimation method based on a subspace projection that is suitable for asymmetric antenna array systems. We show that the so-called pilot contamination problem reported in [1], is an artefact of (inappropriate) linear channel estimation and does not occur in cellular systems with power-controlled handoff when the channel estimation method proposed in this paper is used. We intuitively explain our result by establishing an isomorphism between a massive MIMO system and a spread-spectrum system with unknown signature sequences.

Place, publisher, year, edition, pages
VDE Verlag GmbH, 2013.
Keyword [en]
Multiple antennas, multiple-input multiple-output, (MIMO) systems, massive MIMO, spread-spectrum, channel estimation, principal component analysis
National Category
Signal Processing Telecommunications
URN: urn:nbn:se:kth:diva-119518OAI: diva2:611261
International ITG Workshop on Smart Antennas (WSA 2013), Stuttgart, Germany, March 13-14 2013

QC 20130327

Available from: 2013-03-27 Created: 2013-03-15 Last updated: 2013-03-27Bibliographically approved

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