Non-kolmogorov湍流下到达角分析的模拟实验  

Simulation experiment of angle of arrival analysis under Non-kolmogorov turbulence

作　　者：冯阳 郧建平[1] 单欣[1] FENG Yang;YUN Jianping;SHAN Xin(College of Electronic Information,Wuhan University,Wuhan 430079,China)

机构地区：[1]武汉大学电子信息学院,武汉430072

出　　处：《光通信技术》2018年第11期36-40,共5页Optical Communication Technology

摘　　要：为了分析Non-kolmogorov湍流下的到达角,利用液晶空间光调制器设计了1km无线光通信模拟实验,研究了Non-kolmogorov湍流对到达角概率密度分布、到达角起伏方差和到达角时间频谱的影响。实验结果表明:湍流强度变大时,到达角起伏变大且到达角概率密度分布逐渐偏离正态分布,到达角起伏方差与湍流模型的关系也从开始的正增长逐渐变成负增长;到达角时间频谱的高频段幂律与湍流模型幂律成正增长。实验结果与理论基本一致。In order to analyze the angle of arrival under Non-kolmogorov turbulence, a lkm wireless optical communication simulation experiment was designed by using a liquid crystal spatial light modulator. At the same time, the influence of Non-kolmogorov turbulence on the arrival angle probability density distribution, the arrival angle fluctuation variance and the arrival angle time spectrum was studied. The experimental re- suits show that when the turbulence intensity becomes larger, the arrival angle fluctuation becomes larger and the arrival angle probability density distribution gradually deviates from the normal distribution. The relation- ship between the arrival angle fluctuation variance and the turbulence model also gradually changes from the negative growth to the negative growth. The high-band power law of the arrival angle time spectrum and the power law of the turbulence model grow positively. The experimental results are basically consistent with the theory.

关 键 词：Non-kolmogorov模型 大气湍流 液晶空间光调制器 到达角起伏 时间频谱 

分 类 号：TN92[电子电信—通信与信息系统]