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.
|Title of host publication||IEEE International Conference on Acoustics, Speed and Signal Processing (ICASSP)|
|Publisher||Institute of Electrical and Electronics Engineers (IEEE)|
|Publication status||Published - 12 Jul 2011|
Ngo, H. Q., Larsson, E. G., & Marzetta, T. L. (2011). Analysis of the pilot contamination effect in very large multicell multiuser MIMO systems for physical channel models, In IEEE International Conference on Acoustics, Speed and Signal Processing (ICASSP) Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/ICASSP.2011.5947131