On the effect of correlation on the performance of dual diversity receivers in lognormal fading

Authors:
Dimitrios Skraparlis;Magnus Sandell;Vasileios K. Sakarellos;Athanasios D. Panagopoulos;John D. Kanellopoulos
Affiliations:
Department of Electrical and Computer Engineering, National Technical University of Athens, Zografou, GR;Toshiba TREL, Bristol, UK;Department of Electrical and Computer Engineering, National Technical University of Athens, Zografou, Greece;Department of Electrical and Computer Engineering, National Technical University of Athens, Zografou, Greece;Department of Electrical and Computer Engineering, National Technical University of Athens, Zografou, Greece
Venue:
IEEE Communications Letters
Year:
2010

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Abstract

The bivariate lognormal distribution has been extensively utilized for modeling the fading gains of dual branch diversity receivers in both indoor and outdoor communication systems. The contribution of this letter is twofold: firstly, a general expression for the average bit-error probability (BEP) of diversity combining with two correlated lognormal fading branches is presented, based on a Gauss-Hermite sum approximation to the moment generating function. Secondly, using the proposed expression, it is shown that correlation can be viewed as an increase in the standard deviations of an equivalent diversity system with uncorrelated lognormal fading gains.