基于LED无线日盲紫外光通信系统的研究

发布时间：2018-04-25 00:05

本文选题：紫外通信 + 直视　；参考：《哈尔滨工程大学》2014年硕士论文

【摘要】：无线日盲紫外光通信系统具备较强的抗干扰能力、良好的保密性能、非直视通信和全方位通信等特点。能够作为一种专用局域军事保密通信技术措施,或在特定情况下对其它通信技术进行弥补,是一种新式的军事通信系统。其可以满足复杂电磁环境下的战场应急和保密通信需求,可广泛应用于陆海空三军,对现代化国土防御、未来军事斗争拥有非凡的特殊价值和实际意义。如何实现现代战场通信的迅速、准确、全天候、安全保密已成为当今军事通信研究领域的一个重要议题。本文基于LED对无线日盲紫外光通信系统进行了研究。首先,分析了自由空间紫外研究目的、意义、通信原理、特点、应用、研究现状。在大气传输特性中探讨了大气的特点和组成,并通过大气吸收、散射及湍流等效应对紫外大气信道传输特性进行分析。其次,推导了新的紫外直视通信的模型,并基于此模型仿真分析了路径损耗、误码率、传输距离对系统的影响。在非直视通信方式的基础上,模拟不同角度、高度、散射次数、能见度等参数对系统模型的影响。最后,对紫外通信系统性能进行了测试,包括直视通信的误码率和散射通信的角度等实验。实验效果良好,基本满足设计期望。本课题使用波长为255nm的紫外光,经过测试,通信速率选择600kHz,整个通信系统可以实现100米以内的低误码率直视通信。在非直视通信模式下,选择200kHz改进PPM,虽然牺牲了带宽,但是提高了通信质量。
[Abstract]:Wireless sun-blind ultraviolet communication system has strong anti-jamming capability, good security performance, non-direct view communication and omni-directional communication. It is a new kind of military communication system which can be used as a special local military secure communication technology measure or make up for other communication technology under special circumstances. It can meet the needs of battlefield emergency and confidential communication under complex electromagnetic environment, and can be widely used in the army, navy and air force. It has special value and practical significance for modern national defense and future military struggle. How to realize the modern battlefield communication quickly, accurately, all-weather, security and secrecy has become an important topic in the field of military communication research. In this paper, the wireless solar blind ultraviolet communication system based on LED is studied. Firstly, the purpose, significance, communication principle, characteristics, application and research status of UV in free space are analyzed. In this paper, the characteristics and composition of the atmosphere are discussed, and the transmission characteristics of the ultraviolet atmospheric channel should be analyzed by atmospheric absorption, scattering and turbulence equivalence. Secondly, a new model of UV direct vision communication is derived, and the influence of path loss, bit error rate and transmission distance on the system is simulated and analyzed based on the model. Based on the non-direct view communication mode, the effects of different angles, heights, scattering times and visibility on the system model are simulated. Finally, the performance of the ultraviolet communication system is tested, including the error rate of direct viewing communication and the angle of scattering communication. The experiment effect is good, basically meets the design expectation. In this paper, the ultraviolet light with wavelength of 255nm is used, and the communication rate is 600kHz. The whole communication system can realize the direct viewing communication with low bit error rate (LBER) of less than 100m. In the non-direct view communication mode, 200kHz is chosen to improve the communication quality, although the bandwidth is sacrificed.
【学位授予单位】：哈尔滨工程大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.1

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