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Analysis of Pilot Decontamination Based on Power Control
University Erlangen-Nürnberg.
KTH, School of Electrical Engineering (EES), Communication Theory. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
2013 (English)In: IEEE Vehicular Technology Conference (VTC Spring), 2013, 2013Conference paper (Refereed)
Abstract [en]

A subspace method for channel estimation is pro- posed for asymmetric antenna array systems. The so-called pilot contamination problem reported in [1] is found to be due to the linearity of channel estimation in [2]. We show that it does not occur in cellular systems with power control and power-controlled handoff when the nonlinear channel estimation method proposed in this paper is used. Power-control hand-off is needed to guarantee separability between signal and interference subspaces. We derive the transmission conditions for subspace separability based on free probability and perturbation theory.

Place, publisher, year, edition, pages
National Category
Signal Processing Telecommunications
URN: urn:nbn:se:kth:diva-123387OAI: diva2:625975
IEEE Vehicular Technology Conference (VTC Spring), Dresden, Germany, June 2013

QC 20130709

Available from: 2013-06-06 Created: 2013-06-06 Last updated: 2013-07-09Bibliographically approved

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Vehkaperä, Mikko
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Communication TheoryACCESS Linnaeus Centre
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