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Uplink Capacity of a Variable Density Cellular System with Multicell Processing

Katranaras, E, Imran, MA and Tzaras, C (2009) Uplink Capacity of a Variable Density Cellular System with Multicell Processing IEEE TRANSACTIONS ON COMMUNICATIONS, 57 (7). 2098 - 2108. ISSN 0090-6778

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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: Article
Additional Information: © 2009 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works
Uncontrolled Keywords: Information theory, land mobile radio cellular systems, multiaccess communication, Gaussian channels, multipath channels, propagation, SHANNON-THEORETIC APPROACH, MULTIPLE-ACCESS CHANNEL, CDMA
Divisions: Faculty of Engineering and Physical Sciences > Electronic Engineering > Centre for Communication Systems Research
Depositing User: Symplectic Elements
Date Deposited: 02 Mar 2012 15:13
Last Modified: 23 Sep 2013 19:12
URI: http://epubs.surrey.ac.uk/id/eprint/207032

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