柯熙政,廖志文,梁静远,等. 无线光通信中大气湍流噪声测量研究[J]. 电波科学学报,2024,39(2):1-12. DOI: 10.12265/j.cjors.2023027
      引用本文: 柯熙政,廖志文,梁静远,等. 无线光通信中大气湍流噪声测量研究[J]. 电波科学学报,2024,39(2):1-12. DOI: 10.12265/j.cjors.2023027
      KE X Z, LIAO Z W, LIANG J Y, et al. Research on measurement of atmospheric turbulence noise in wireless optical communication[J]. Chinese journal of radio science,2024,39(2):1-12. (in Chinese). DOI: 10.12265/j.cjors.2023027
      Citation: KE X Z, LIAO Z W, LIANG J Y, et al. Research on measurement of atmospheric turbulence noise in wireless optical communication[J]. Chinese journal of radio science,2024,39(2):1-12. (in Chinese). DOI: 10.12265/j.cjors.2023027

      无线光通信中大气湍流噪声测量研究

      Research on measurement of atmospheric turbulence noise in wireless optical communication

      • 摘要: 光信号的强度闪烁、光斑漂移、光束扩展、到达角起伏等大气湍流现象会影响光信号在大气中的传输性能。本文将这种闪烁效应看作是光通信系统传输中的乘性噪声,推导了大气湍流乘性噪声模型,并进行了实验测量研究。结果表明:按照晴天、雾霾天、雪天、小雨天、中雨天、大雨天及阴天的顺序,湍流乘性噪声对光通信的通信质量影响加剧,大气折射率结构常数逐渐增大,噪声信号的偏斜度与陡峭度随之增加,导致光强信号的衰落概率变大;同时随着信噪比(signal-to-noise ratio, SNR)的增大,系统的中断概率逐渐减小;而在相同的SNR下,中断概率随着大气折射率结构常数的减小而减小。研究大气湍流噪声对无线光通信系统的影响具有重要的意义,它为大范围、高速的无线光通信技术带来重要的技术突破,对无线光通信技术的发展起到重要的作用。

         

        Abstract: 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.

         

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