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An Exact Performance Analysis of MRC / OSTBC over Generalized Fading Channels

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4 Author(s)
Ropokis, G.A. ; Dept. of Comput. Eng. & Inf., Univ. of Patras, Rio, Greece ; Rontogiannis, A.A. ; Mathiopoulos, P.T. ; Berberidis, K.

A unified analytical framework for evaluating the performance of maximal ratio combining (MRC) and orthogonal space-time block coding (OSTBC) over generalized fading channels is presented. The basic motivation for developing such a framework pertains to analyzing the distribution of a sum of squared random variables (RVs) belonging to different families of fading distributions. Following a novel analytical approach stemming from the definition of a common moment generating function (MGF) model for these families of distributions, the probability density function (PDF) and the cumulative distribution function (CDF) of a general sum of squared RVs are expressed by simple infinite Gamma series expansions. Based on these expressions, the capacity and error probability of MRC/OSTBC over generalized fading channels is thoroughly studied. The developed theory is used to evaluate the performance of OSTBC for a mixed Nakagami-m/Rice fading model and novel analytical results are presented. The accuracy of the derived expressions is validated by extensive Monte Carlo simulations.

Published in:

Communications, IEEE Transactions on  (Volume:58 ,  Issue: 9 )

Date of Publication:

September 2010

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