J. Hu and N.C. Beaulieu (Canada)
Ricean channel, sum distributions and densities, approxi mation methods, diversity systems, wireless communica tions.
The statistical distribution of a sum of Ricean random variables is often necessary when modeling and analyzing the performance of wireless communication systems. A closed-form expression does not exist for the sum distribu tion and, in addition, the characteristic function of a Ricean random variable does not have a closed-form. As a result, it is somewhat difficult to numerically calculate the sum dis tribution. Highly accurate, closed-form approximations to the distributions and densities of Ricean sum random vari ables are presented in this paper. These approximations are valid for a wide range of probability values, Rice factors, and number of summands.
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