调制技术对紫外光通信信号传输衰减特性研究  

Study on attenuation characteristics of modulation technology for ultraviolet communication signal transmission

作　　者：刘庆杰[1] 王晨 王小英[1] LIU Qingjie;WANG Chen;WANG Xiaoying(Institute of Disaster Prevention Science and Technology,Sanhe Hebei 065200,China)

机构地区：[1]防灾科技学院,河北三河065200

出　　处：《激光杂志》2020年第4期158-161,共4页Laser Journal

基　　金：国家重点研发专题(No.2018YFC1503805)。

摘　　要：针对当前相关研究成果无法高效降低传输误码率的问题,提出基于PPM调制技术的紫外光通信信号传输衰减控制方法。对比内外调制模式各自优势,选取内调制实现通信信号传输衰减控制。考虑到紫外光会受到大气分子的吸收与散射作用等因素影响,使用内调制模式中的脉冲位置调制技术PPM,通过将一组二进制若干位信息数据组映射成若干个时隙构成的时间段中某时隙位置单脉冲信号,仅在该时隙传送脉冲信号,其他时隙不传送的方式控制信号传输,以降低衰减特性给紫外光通信带来的影响。实验结果表明,提出的利用PPM技术控制紫外光通信信号传输方法具有可行性,且信号传输误码率低于文献成果。In order to solve the problem that the current research results can not effectively reduce the transmission bit error rate (BER),a UV communication signal transmission attenuation control method based on PPM modulation technology is proposed. Comparing the advantages of internal and external modulation modes,internal modulation is selected to realize communication signal transmission attenuation control. Considering that ultraviolet light will be affected by the absorption and scattering of atmospheric molecules,PPM,a pulse position modulation technique in internal modulation mode,is used to control the signal by mapping a set of binary bit information data sets into a certain time slot position mono-pulse signal in a time slot,only in that time slot,and not in other time slot to reduce the impact of attenuation characteristics on UV communication. The experimental results show that the proposed method using PPM technology to control UV communication signal transmission is feasible,and the bit error rate of signal transmission is lower than that of the literature.

关 键 词：调制技术 紫外光通信 信号 衰减 

分 类 号：TN929[电子电信—通信与信息系统]