Blind Pilot Decontamination
2013 (English)In: International ITG Workshop on Smart Antennas (WSA 2013), VDE Verlag GmbH, 2013Conference paper (Refereed)
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 , 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.
Multiple antennas, multiple-input multiple-output, (MIMO) systems, massive MIMO, spread-spectrum, channel estimation, principal component analysis
Signal Processing Telecommunications
IdentifiersURN: urn:nbn:se:kth:diva-119518OAI: oai:DiVA.org:kth-119518DiVA: diva2:611261
International ITG Workshop on Smart Antennas (WSA 2013), Stuttgart, Germany, March 13-14 2013
QC 201303272013-03-272013-03-152013-03-27Bibliographically approved