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Optical wireless communication (OWC) is highly vulnerable to the atmosphericturbulence and pointing error. Performance analysis of the OWC system under thecombined channel effects of pointing errors and atmospheric turbulence isdesirable for its efficient deployment. The widely used Gamma- Gammastatistical model for atmospheric turbulence, which consists of Besselfunction, generally leads to complicated analytical expressions. In this paper,we consider the three-parameter exponentiated Weibull model for the atmosphericturbulence to analyze the ergodic rate and average signal-to-noise ratio (SNR)performance of a single-link OWC system. We derive simplified analyticalexpressions on the performance under the combined effect of atmosphericturbulence and pointing errors in terms of system parameters. We also deriveapproximate expressions on the performance under the atmospheric turbulence byconsidering negligible pointing error. In order to evaluate the performance athigh SNR, we also develop asymptotic bounds on the average SNR and ergodic ratefor the considered system. We demonstrate the tightness of derived expressionsthrough numerical and simulation analysis along with a comparison to theperformance obtained using the Gamma-Gamma model.

Simplified Performance Analysis of OWC System Over Atmospheric Turbulence with Pointing Error