Optical propagation through non-Kolmogorov turbulence  

作　　者：TANG Hua OU BaoLin 

机构地区：[1]School of Electronic and Information Engineering,Beihang University

出　　处：《Science China(Information Sciences)》2013年第4期65-70,共6页中国科学（信息科学）（英文版）

基　　金：supported by Key Project of National Natural Science Foundation of China (Grant No. 60837004);Project of National Natural Science Foundation of China (Grant No. 61101005);Project-sponsored by SRF for ROCS,SEM,Fundamental Research Funds for the Central Universities (Grant No. YWF-11-03-Q-159)

摘　　要：In this paper, the effects of the generalized exponent, the height and the zenith angle on the log-amplitude variance in the weak fluctuation are investigated. The theoretical results indicate that for the downlink, the log-amplitude variance of the Kolmogorov model is always smaller than that of the three-layer model, while for the uplink, there is a point of intersection in the log-amplitude variance curves of the two models. The different phenomena for the downlink and uplink are analyzed in detail. Further, we find a method to ascertain precise values of the boundary layer altitudes for the three-layer model under various atmospheric conditions through the analysis for the point of intersection. And at the point of intersection, the Kolmogorov model can be used to replace the three-layer model to simplify the analysis of the system performance. Moreover, the log-amplitude variance increases with the increase of the zenith angle.In this paper, the effects of the generalized exponent, the height and the zenith angle on the log-amplitude variance in the weak fluctuation are investigated. The theoretical results indicate that for the downlink, the log-amplitude variance of the Kolmogorov model is always smaller than that of the three-layer model, while for the uplink, there is a point of intersection in the log-amplitude variance curves of the two models. The different phenomena for the downlink and uplink are analyzed in detail. Further, we find a method to ascertain precise values of the boundary layer altitudes for the three-layer model under various atmospheric conditions through the analysis for the point of intersection. And at the point of intersection, the Kolmogorov model can be used to replace the three-layer model to simplify the analysis of the system performance. Moreover, the log-amplitude variance increases with the increase of the zenith angle.

关 键 词：atmospheric turbulence three-layer model log-amplitude variance power spectral density generalized exponent 

分 类 号：TN929.1[电子电信—通信与信息系统]