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  本文選題：紫外通信 + 直視　； 參考：《哈爾濱工程大學(xué)》2014年碩士論文

【摘要】：無線日盲紫外光通信系統(tǒng)具備較強(qiáng)的抗干擾能力、良好的保密性能、非直視通信和全方位通信等特點(diǎn)。能夠作為一種專用局域軍事保密通信技術(shù)措施,或在特定情況下對其它通信技術(shù)進(jìn)行彌補(bǔ),是一種新式的軍事通信系統(tǒng)。其可以滿足復(fù)雜電磁環(huán)境下的戰(zhàn)場應(yīng)急和保密通信需求,可廣泛應(yīng)用于陸�？杖�,對現(xiàn)代化國土防御、未來軍事斗爭擁有非凡的特殊價值和實(shí)際意義。如何實(shí)現(xiàn)現(xiàn)代戰(zhàn)場通信的迅速、準(zhǔn)確、全天候、安全保密已成為當(dāng)今軍事通信研究領(lǐng)域的一個重要議題。本文基于LED對無線日盲紫外光通信系統(tǒng)進(jìn)行了研究。首先,分析了自由空間紫外研究目的、意義、通信原理、特點(diǎn)、應(yīng)用、研究現(xiàn)狀。在大氣傳輸特性中探討了大氣的特點(diǎn)和組成,并通過大氣吸收、散射及湍流等效應(yīng)對紫外大氣信道傳輸特性進(jìn)行分析。其次,推導(dǎo)了新的紫外直視通信的模型,并基于此模型仿真分析了路徑損耗、誤碼率、傳輸距離對系統(tǒng)的影響。在非直視通信方式的基礎(chǔ)上,模擬不同角度、高度、散射次數(shù)、能見度等參數(shù)對系統(tǒng)模型的影響。最后,對紫外通信系統(tǒng)性能進(jìn)行了測試,包括直視通信的誤碼率和散射通信的角度等實(shí)驗(yàn)。實(shí)驗(yàn)效果良好,基本滿足設(shè)計期望。本課題使用波長為255nm的紫外光,經(jīng)過測試,通信速率選擇600kHz,整個通信系統(tǒng)可以實(shí)現(xiàn)100米以內(nèi)的低誤碼率直視通信。在非直視通信模式下,選擇200kHz改進(jìn)PPM,雖然犧牲了帶寬,但是提高了通信質(zhì)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.
【學(xué)位授予單位】：哈爾濱工程大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN929.1

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