Multi-cell MIMO Downlink with Fairness Criteria: the Large System Limit
release_nhyqwxhp55c7ddi56jpm5iwury
by
Hoon Huh, Giuseppe Caire, Sung-Hyun Moon, Inkyu Lee
2010
Abstract
We consider the downlink of a cellular network with multiple cells and
multi-antenna base stations including arbitrary inter-cell cooperation,
realistic distance-dependent pathloss and general "fairness" requirements.
Beyond Monte Carlo simulation, no efficient computation method to evaluate the
ergodic throughput of such systems has been provided so far. We propose an
analytic method based on the combination of the large random matrix theory with
Lagrangian optimization. The proposed method is computationally much more
efficient than Monte Carlo simulation and provides a very accurate
approximation (almost indistinguishable) for the actual finite-dimensional
case, even for of a small number of users and base station antennas. Numerical
examples include linear 2-cell and planar three-sectored 7-cell layouts, with
no inter-cell cooperation, sector cooperation, and full cooperation.
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