半导体光电, 2015, 36 (2): 259, 网络出版: 2015-06-25  

高空紫外光通信信道特性

Characteristics of Ultraviolet Communication Channel in High Atmosphere
作者单位
空军工程大学 信息与导航学院, 西安 710077
摘要
为研究高空大气信道对紫外激光通信的影响, 引入散射链路所在高度信息修正紫外光单次散射链路模型; 依照大气密度和臭氧浓度垂直分布得到紫外光散射系数和吸收系数变化规律; 对高空15km以下信号传播的时延、信噪比和信道容量进行仿真分析, 得到以上三者的高空垂直分布。结果表明: 高空大气环境对紫外光的消光系数主要由吸收系数决定; 较小的散射作用令高空通信时延比近地面通信略低; 吸收作用导致信噪比和信道容量均随通信平台位置高度增加而减小。高空紫外通信基本满足低速语音通信的要求。
Abstract
In order to study the influences of high atmosphere channel on ultraviolet communication, the height information of scattering link was added to fix the ultraviolet single scattering link model. According to atmosphere density and the vertical distributions of ozone thickness, variations of the scattering coefficient and absorption coefficient were gained. Delay, SNR and channel capacity were simulated and their vertical distributions were gained, below the height of 15km. The results show that the extinction coefficient is dominated by absorption coefficient. Weaker scattering makes delay a bit lower in high atmosphere than near ground. Absorption reduces SNR and channel capacity with the increasing location height of communication devices. Ultraviolet communication in high atmosphere basically meets the demand of low-rate voice communication.

强若馨, 赵尚弘, 刘韵. 高空紫外光通信信道特性[J]. 半导体光电, 2015, 36(2): 259. QIANG Ruoxin, ZHAO Shanghong, LIU Yun. Characteristics of Ultraviolet Communication Channel in High Atmosphere[J]. Semiconductor Optoelectronics, 2015, 36(2): 259.

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