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无线光通信(FSO)系统的性能受大气湍流影响会产生剧烈波动。根据系统和大气参数评估系统差错性能的研究具有现实意义。以大气湍流信道和光电探测模型为基础,使用拟合概率分布替换常用的对数正态分布,建立了FSO系统差错性能的数学仿真模型,改进了湍流条件下系统误码率计算公式,并且进行全天的验证实验。实验结果显示,光强概率分布对系统性能有显著的影响,原有公式在某些情况下的计算结果有较大偏差,而改进公式的计算结果具有更好的适应性和准确性。该改进公式可有效评估湍流条件下FSO系统性能,并为相关理论研究提供参考。
The performance of wireless optical communications (FSO) systems is subject to severe fluctuations due to atmospheric turbulence. It is of practical significance to evaluate system error performance based on system and atmospheric parameters. Based on atmospheric turbulence channel and photodetection model, the fitting probability distribution is used to replace the common lognormal distribution, a mathematical simulation model of FSO system error performance is established, and the system error rate calculation formula under turbulent flow condition is improved. All day validation experiment. The experimental results show that the probability distribution of light intensity has a significant influence on the system performance. The original formula has large deviation in some cases and the improved formula has better adaptability and accuracy. The improved formula can effectively evaluate the performance of FSO under turbulent conditions and provide reference for relevant theoretical research.