论文标题
通过指向错误的大气湍流对OWC系统的简化性能分析
Simplified Performance Analysis of OWC System Over Atmospheric Turbulence with Pointing Error
论文作者
论文摘要
光学无线通信（OWC）非常容易受到大气湍流和指向错误的影响。在指向错误和大气湍流的合并通道效应下对OWC系统的性能分析是可以有效地部署的。大气湍流的广泛使用的γ-γ统计模型通常会导致复杂的分析表达。在本文中，我们考虑了三参数的启用Weibull模型的大气湍流模型，以分析单个链路OWC系统的Ergodic速率和平均信噪比（SNR）性能。在大气湍流的综合效果和系统参数方面，我们得出了对性能的简化分析表达。我们还通过考虑可忽略的指向误差来得出有关大气湍流下性能的近似表达式。为了评估高SNR的性能，我们还根据所考虑的系统的平均SNR和千古率开发了渐近界。我们通过数值和仿真分析与使用伽马模型获得的性能进行比较，证明了派生表达式的紧密度。
Optical wireless communication (OWC) is highly vulnerable to the atmospheric turbulence and pointing error. Performance analysis of the OWC system under the combined channel effects of pointing errors and atmospheric turbulence is desirable for its efficient deployment. The widely used Gamma- Gamma statistical model for atmospheric turbulence, which consists of Bessel function, generally leads to complicated analytical expressions. In this paper, we consider the three-parameter exponentiated Weibull model for the atmospheric turbulence to analyze the ergodic rate and average signal-to-noise ratio (SNR) performance of a single-link OWC system. We derive simplified analytical expressions on the performance under the combined effect of atmospheric turbulence and pointing errors in terms of system parameters. We also derive approximate expressions on the performance under the atmospheric turbulence by considering negligible pointing error. In order to evaluate the performance at high SNR, we also develop asymptotic bounds on the average SNR and ergodic rate for the considered system. We demonstrate the tightness of derived expressions through numerical and simulation analysis along with a comparison to the performance obtained using the Gamma-Gamma model.
