Uplink capacity of a variable density cellular system with multicell processing

Katranaras, E., Imran, M. A. and Tzaras, C. (2009) Uplink capacity of a variable density cellular system with multicell processing. IEEE Transactions on Communications, 57(7), pp. 2098-2108. (doi:10.1109/TCOMM.2009.07.070626)

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Abstract

In this work we investigate the information theoretic capacity of the uplink of a cellular system. Assuming centralised processing for all base stations, we consider a power-law path loss model along with variable cell size (variable density of Base Stations) and we formulate an average path-loss approximation. Considering a realistic Rician flat fading environment, the analytical result for the per-cell capacity is derived for a large number of users distributed over each cell. We extend this general approach to model the uplink of sectorized cellular system. To this end, we assume that the user terminals are served by perfectly directional receiver antennas, dividing the cell coverage area into perfectly non-interfering sectors. We show how the capacity is increased (due to degrees of freedom gain) in comparison to the single receiving antenna system and we investigate the asymptotic behaviour when the number of sectors grows large. We further extend the analysis to find the capacity when the multiple antennas used for each Base Station are omnidirectional and uncorrelated (power gain on top of degrees of freedom gain). We validate the numerical solutions with Monte Carlo simulations for random fading realizations and we interpret the results for the real-world systems.

Item Type:Articles
Additional Information:This research has been funded by the following Industrial Companies who are Members of Mobile VCE - BBC, BT, Huawei, Nokia, Nokia Siemens Networks, Nortel, Vodafone.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Imran, Professor Muhammad
Authors: Katranaras, E., Imran, M. A., and Tzaras, C.
College/School:College of Science and Engineering > School of Engineering
Journal Name:IEEE Transactions on Communications
Publisher:IEEE
ISSN:0090-6778
ISSN (Online):1558-0857
Published Online:17 July 2009
Copyright Holders:Copyright © 2009 IEEE
First Published:First published in IEEE Transactions on Communications 57(7): 2098-2108
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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