Analysis of the pilot contamination effect in very large multicell multiuser MIMO systems for physical channel models

We consider multicell multiuser MIMO systems with a very large number of antennas at the base station. We assume that the channel is estimated by using uplink training sequences, and we consider a physical channel model where the angular domain is separated into a finite number of directions. We ana...

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Bibliographic Details
Published in2011 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) pp. 3464 - 3467
Main Authors Ngo, Hien Quoc, Marzetta, Thomas L., Larsson, Erik G.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.05.2011
Subjects
Pilot contamination
Training
Transmitting antennas
very large MIMO systems
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Summary:We consider multicell multiuser MIMO systems with a very large number of antennas at the base station. We assume that the channel is estimated by using uplink training sequences, and we consider a physical channel model where the angular domain is separated into a finite number of directions. We analyze the so-called pilot contamination effect discovered in previous work, and show that this effect persists under the finite-dimensional channel model that we consider. We further derive closed-form bounds on the achievable rate of uplink data transmission with maximum-ratio combining, for a finite and an infinite number of base station antennas.
ISBN:9781457705380
1457705389
ISSN:1520-6149
DOI:10.1109/ICASSP.2011.5947131