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Gamma-Gamma模型是目前无线光通信中常用的光强闪烁模型。针对其参数模型较为复杂,各种近似模型的使用无参考依据的问题,在高斯光束下,通过仿真计算的方法,分别研究了波形条件、孔径尺寸、传输距离、内外尺度、湍流强度以及波长六方面因素对Gamma-Gamma模型的影响情况。结果表明:波形条件、孔径直径、传输距离、湍流强度对其影响都是不可忽略的,而内外尺度、近红外波段波长的影响则可以忽略不计;同时,只要孔径直径与传输距离的比值保持不变,则Gamma-Gamma模型分布特性不变。这些结论可为实际应用中模型的简化和无线光通信设备参数的设置提供参考和依据。
Gamma-Gamma model is currently used in wireless optical communications commonly used model of light flicker. Aiming at the problem that its parametric model is complicated and all kinds of approximate models are used without reference, under the Gaussian beam, the waveform conditions, aperture size, transmission distance, internal and external scale, turbulence intensity and wavelength of six The influence of factors on the Gamma-Gamma model. The results show that the influence of the waveform conditions, the aperture diameter, the transmission distance and the turbulence intensity are negligible, while the influences of the inner and outer scale and the wavelength of the near infrared band are negligible. Meanwhile, as long as the ratio of the aperture diameter to the transmission distance remains unchanged Change, then the Gamma-Gamma model distribution characteristics unchanged. These conclusions can provide reference and basis for the simplification of the model in practice and the setting of wireless optical communication equipment parameters.