Analysis of Pilot Decontamination Based on Power Control
2013 (English)In: IEEE Vehicular Technology Conference (VTC Spring), 2013, 2013Conference paper (Refereed)
A subspace method for channel estimation is pro- posed for asymmetric antenna array systems. The so-called pilot contamination problem reported in  is found to be due to the linearity of channel estimation in . 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
Signal Processing Telecommunications
IdentifiersURN: urn:nbn:se:kth:diva-123387OAI: oai:DiVA.org:kth-123387DiVA: diva2:625975
IEEE Vehicular Technology Conference (VTC Spring), Dresden, Germany, June 2013
QC 201307092013-06-062013-06-062013-07-09Bibliographically approved