Title :
Capacity of Cellular Uplink with Multiple Tiers of Users and Path Loss
Author :
Kaltakis, D. ; Katranaras, E. ; Imran, M.A. ; Tzaras, C.
Author_Institution :
Center for Commun. Syst. Res., Surrey Univ., Guildford
Abstract :
With the emergence and continuous growth of wireless data services, the value of a wireless network is not only defined by how many users it can support, but also by its ability to deliver higher data rates. Information theoretic capacity of cellular systems with fading is usually estimate.d using models originally inspired by Wyner´s gaussian cellular multiple access channel (GCMAC). In this paper we extend this model to study the cellular system with users distributed over the cellular coverage area. Based on the distance from the cell-site receiver, users are grouped as tiers, and received signals from each tier are scaled using a distance dependent attenuation factor. The optimum capacity in fading environment is then found by calculating the path-loss for users in each tier using a specific path-loss law and some interesting insights are derived. The results correspond to a more realistic model which boils down to Wyner´s model with fading, with appropriate substitutions of parameter values. The results are verified using Wyner´s model with fading and Monte-Carlo simulations. Insights are provided for the real world scenarios.
Keywords :
Gaussian channels; Monte Carlo methods; cellular radio; fading channels; multi-access systems; radio links; radio receivers; GCMAC; Monte Carlo simulations; Wyner´s model; cell-site receiver; cellular system; cellular uplink; distance dependent attenuation factor; fading environment; gaussian cellular multiple access channel; multiple tiers; Attenuation; Base stations; Cellular networks; Communication systems; Constraint theory; Delay; Fading; Information theory; Interference; Wireless networks; Capacity; Cellular Uplink; Hyper-receiver; Information Theory;
Conference_Titel :
Telecommunications, 2008. AICT '08. Fourth Advanced International Conference on
Conference_Location :
Athens
Print_ISBN :
978-0-7695-3162-5
Electronic_ISBN :
978-0-7695-3162-5
DOI :
10.1109/AICT.2008.49