Abstract
This paper studies the calculation of Symbol Error Probability (SEP) for Nakagami-Lognormal (N/L) composite fading channel and Rician fading channel. The computational complexity involved in the calculation of the double integral in the expression of SEP for composite N/L channel is very high. Therefore, two closed form approximation for the Probability Distribution Function (PDF) of the composite N/L channel are obtained using the approximation proposed by Holtzman and Gauss Hermite. It is found that SEP result from the approximation proposed by Holtzman and Gauss Hermite are very close to the exact SEP for low and high SNR, respectively. Further, the performance of the two approximation are evaluated in a combined (time shared) N/L and Rician fading channel.
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