The performance of macrodiversity system in the presence of long-term and short-term fading

Authors:
Časlav Stefanovic;Dragana Krstic;Ana Pešic;Mihajlo Stefanovic;Dejan Petkovic
Affiliations:
Faculty of Electronic Engineering, University of Niš, Serbia;Faculty of Electronic Engineering, University of Niš, Serbia;Faculty of Electronic Engineering, University of Niš, Serbia;Faculty of Electronic Engineering, University of Niš, Serbia;Faculty of Occupational Safety, University of Niš, Serbia
Venue:
WSEAS TRANSACTIONS on COMMUNICATIONS
Year:
2009

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Composite Macroscopic and Microscopic Diversity of Sectorized Macrocellular and Microcellular Mobile Radio SystemsEmploying RAKE Receiver over Nakagami Fading Plus Lognormal Shadowing Channel

Wireless Personal Communications: An International Journal
Wireless Communications

Wireless Communications

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Abstract

Probability density function (PDF), moments of signal and amount of fading (AF) at the output of macrodiversity system in closed form are obtained. Moreover, level crossing rate (LCR) of signal at output of macro diversity system is analytically derived and used to study average fade duration (AFD) of the proposed system. Dual maximal-ratio combining (MRC) is implemented at the micro level (single base station) and selection combining (SC) with two base stations (dual diversity) is implemented at the macro level. This model assumes a Nakagami-m density function for the envelope of the received signal and a gamma distribution to model the average power to account for the shadowing. The results are shown graphically for different signal and fading parameters values.