Khan, Noor M., Simsim, Mohammed T. and Rapajic, Predrag B. (2008) A generalized model for the spatial characteristics of the cellular mobile channel. IEEE Transactions on Vehicular Technology, 57 (1). pp. 22-37. ISSN 0018-9545 (doi:https://doi.org/10.1109/TVT.2007.904532)

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Abstract

In this paper, we present an intensive study of the spatial characteristics of the cellular mobile channel for picocell, microcell, and macrocell environments. We review the previous physical channel models and make appropriate comments/corrections wherever needed. We find that almost all physical channel models proposed so far are specific to particular cellular environments and that no general model exists in the literature. Thus, we propose a generalized physical channel model, referred to as the eccentro-scattering model, and derive the expressions for the probability density function (pdf) in an angle of arrival (AoA) of the multipath signals at a base station (BS) for the picocell, microcell, and macrocell environments using the two most commonly used scatterers' distributions, i.e., uniform and Gaussian. The derived formulas, in closed form, can be further used in designing beamwidth and channel tracking algorithms and assessing the performance of smart antennas. We discuss the relations between the results obtained for different cellular environments in the uniform and the Gaussian scattering and investigate the effects of the standard deviation of the scatter density and size of the scattering disc on the pdf of AoA at the BS. Previous work on the AoA statistics considering either the shape of the scattering regions or the distribution of scatterers within that region can more easily be reproduced using the provided general formula. We prove that assuming the scatterers to be either uniformly or Gaussian distributed in sparsely populated areas gives almost the same distribution of AoA of multipaths at the BS.

Item Type:	Article
Additional Information:	[1] Date of Current Version : 14 January 2008. Issue Date : January 2008. [2] This paper was presented in part at the IEEE Symposium on Trends in Communications (SympoTIC’04), Bratislava, Slovakia, October 2004, and in part at the 8th IEEE International Conference on Telecommunications (ConTEL’05), Zagreb, Croatia, June 2005. The review of this paper was coordinated by Prof. A. Abdi.
Uncontrolled Keywords:	Gaussian distributions, geometric modeling, multipath channels
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Pre-2014 Departments:	School of Engineering School of Engineering > Mobile & Wireless Communications Research Laboratory
Related URLs:	Publisher Organisation
Last Modified:	14 Oct 2016 09:24
URI:	http://gala.gre.ac.uk/id/eprint/9915

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