不同波长紫外光信号在高空大气通信中的性能分析

发布时间：2018-01-18 14:31

本文关键词：不同波长紫外光信号在高空大气通信中的性能分析　出处：《半导体光电》2017年01期 　论文类型：期刊论文

【摘要】：为分析高空紫外光通信性能,建立了高空太阳辐射分布模型;研究了不同波长紫外光的高空散射系数和吸收系数;考虑太阳辐射的背景光和接收端散粒噪声,对紫外光直视与非直视链路的损耗和信噪比进行了仿真分析。结果表明:在高空30km以下,由太阳辐射产生的背景光远小于接收端散粒噪声;在7km的高度上280nm的信号光可实现距离为5km、速率为10Mb/s的直视通信和距离1km、速率50kb/s、收发端仰角为20°的非直视通信。直视与非直视通信可以通过选择波长在"日盲区"两端的信号来减小臭氧对紫外光的吸收作用,提高信噪比;非直视通信还可以选择"日盲区"波长短的信号来增强散射效应,改善通信性能。
[Abstract]:In order to analyze the communication performance of high altitude ultraviolet light, a model of solar radiation distribution at high altitude is established. The high-altitude scattering coefficient and absorption coefficient of ultraviolet light with different wavelengths are studied. Considering the background light of solar radiation and the shot noise at the receiving end, the loss and SNR of the link between direct and non-direct ultraviolet light are simulated and analyzed. The results show that the loss and SNR are below 30km. The background light produced by solar radiation is much smaller than the shot noise at the receiving end. At the altitude of 7 km, 280nm signal light can realize the direct viewing communication with a range of 5 km, a rate of 10 MB / s and a distance of 1 km / s, and a rate of 50 kb / s. The non-direct-looking communication with elevation angle of 20 掳at the transceiver can reduce the absorption effect of ozone to ultraviolet light and improve the signal-to-noise ratio (SNR) by selecting the signal at the two ends of "day blind area". The signal with short wavelength can be chosen to enhance the scattering effect and improve the communication performance.
【作者单位】：空军工程大学信息与导航学院;空军大连通信士官学校;中国人民解放军93010部队;
【分类号】：TN929.1
【正文快照】： 3.中国人民解放军93010部队,沈阳110016)0引言紫外激光在大气分子和气溶胶粒子作用下产生强烈的散射现象,同时大气臭氧层对200~280nm波段光的吸收作用使得近地面一定高度空间内无该波段的背景光。因此,利用紫外光实现的散射通信具有低窃听率、低位辨率、抗干扰能力强、全方位

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