Research on measurement of atmospheric turbulence noise in wireless optical communication

Atmospheric turbulence affects the transmission performance of optical signals in the atmosphere, mainly including intensity flicker, spot drift, beam spread, angle of arrival fluctuation, etc. This flicker effect is regarded as the multiplicative noise in the optical communication system transmission in this paper. The multiplicative noise model of atmospheric turbulence is derived and experimentally measured. The results show that: according to the order of sunny day, haze day, snow day, light rain, moderate rain, heavy rain and cloudy day, the effect of turbulent multiplicative noise on optical communication quality is intensified, the structure constant of atmospheric refractive index gradually increases, and the skewness and kurtosis of noise signal increase. Meanwhile, with the increase of signal-to-noise ratio (SNR), the outage probability of the system decreases gradually; at the same SNR, the outage probability decreases with the decrease of atmospheric refractive index structure constant. Studying the impact of atmospheric turbulence noise on wireless optical communication systems is of great significance. It brings important technological breakthroughs for large-scale and high-speed wireless optical communication technology and plays an important role in the development of wireless optical communication technology.