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基于近海环境的大气信道测试链路,实时测量了大气湍流中的大气折射率结构常数、光束漂移方差和光束半径等参数的实验数据。对仅考虑湍流影响和考虑指向误差影响的无线光通信的误码率(BER)模型进行对比分析,分析考虑指向误差影响下的BER分别随大气折射率结构常数、光束漂移和光束扩展半径的变化关系。分析结果表明,实际测量的BER分布随着大气折射率结构常数的增大而变大,受到光束漂移和光斑扩展效应的影响,在大气折射率结构常数较小时,实际测量BER较理论计算的BER大10~20个数量级。
Based on the atmospheric channel test link in offshore environment, real-time measurement of atmospheric turbulence atmospheric refractive index structure constant, beam drift variance and beam radius and other parameters of the experimental data. The BER model of wireless optical communication considering only the influence of turbulence and the effect of pointing error is compared and analyzed. The variation of BER under the influence of pointing error with the atmospheric refractive index structure constant, beam drift and beam expansion radius relationship. The results show that the measured BER distribution increases with the increase of atmospheric refractive index structure constant and is affected by the beam drift and flare expansion effect. When the atmospheric refractive index structure constant is small, the measured BER is better than the theoretical calculated BER Large 10 to 20 orders of magnitude.