Unified Approach to the Analytical Assessment of Multi-user Diversity with Imperfect Channel State Information
Conference: European Wireless 2006 - 12th European Wireless Conference 2006 - Enabling Technologies for Wireless Multimedia Communications
04/02/2006 - 04/05/2006 at Athens, Greece
Proceedings: European Wireless 2006
Pages: 6Language: englishTyp: PDF
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Authors:
Vicario, José López; Antón-Haro, Carles (Centre Tecnol`ogic de Telecomunicacions de Catalunya (CTTC), Parc Mediterrani de la Tecnologia (PMT), Av. Canal Ol´impic s/n, 08860 Castelldefels, SPAIN)
Abstract:
In this paper, we explore the combined use of spatial and multi-user diversity in a cellular system where the channel state information (CSI) available at the base station (BS) is subject to imperfections. To do that, we consider a general statistical approach to describe the degree of CSI imperfection. By doing so, performance assessment is conducted for the generalized case in terms of ergodic system capacity, for which closed-form expressions are derived. In order to gain some insight, practical examples are presented and spatial vs. multi-user diversity trade-offs are analytically assessed.