【摘要】：激光通信滿足了人們對大數(shù)據(jù)率通信的要求,然而激光在大氣介質的通信過程中會產生散射作用,而散射光也攜帶著重要的信息。由于紫外光散射作用明顯,并且相應探測器的迅速發(fā)展,使得紫外光散射光通信發(fā)展迅速。由于激光通信中常用紅外光或近紅外光進行通信,如果能夠實現(xiàn)近紅外光波長的大氣散射光通信,便可以利用散射光通信來實現(xiàn)軍事等方面的應用。因此,有必要進行近紅外光的大氣散射光通信的研究。首先,以大氣光學中的散射及吸收基本理論為基礎,并利用單次散射理論模型,進行近紅外光大氣散射光通信中系統(tǒng)鏈路的理論傳輸模型建立。該模型中闡述了散射和吸收作用的影響,散射相函數(shù)在散射過程中的作用。在引入橢球坐標系下,研究了各物理參數(shù)對于整個系統(tǒng)影響的理論模型。詳細闡明了影響接收功率值的幾何和系統(tǒng)結構參數(shù)的理論模型關系。其次,在理論模型的建立基礎之上,重點研究了各幾何參數(shù)對于接收功率值和路徑損耗的影響。通過仿真結果,可以得到選擇近紅外光波長進行通信較好。在近紅外光波段下,距離越小,接收孔徑值越大,在給出的最佳收發(fā)仰角值下接收功率值就越大。同時發(fā)射半角和接收半角的值越大接收功率的值越大,進而關于各參數(shù)對于路徑損耗的影響也進行了詳細的討論。最后,基于單次散射理論模型,得出系統(tǒng)對于最小脈沖間隔的理論要求,并給出幾何條件下的最大通信數(shù)據(jù)率和通信距離關系,并以此為基礎,在給定探測器的情況下,討論了通信數(shù)據(jù)率、通信距離、收發(fā)仰角和收發(fā)半角對于發(fā)射功率要求的理論模型,并給出了仿真結果及分析。結合開關鍵(OOK)調制方式,根據(jù)通信速率得出誤碼率的理論結果及分析,并給出系統(tǒng)概略試驗設計方案。經(jīng)過理論上的研究,將為后續(xù)近紅外光散射通信實驗提供理論依據(jù),具有重要指導意義。
[Abstract]:Laser communication meets the requirements of big data rate communication. However, laser scattering plays an important role in the communication process of atmospheric media, and scattered light also carries important information. Due to the obvious effect of ultraviolet light scattering and the rapid development of corresponding detectors, the communication of ultraviolet scattering light is developing rapidly. Since infrared or near-infrared light is commonly used to communicate in laser communication, if the atmospheric scattering light communication of near-infrared light wavelength can be realized, the scattering light communication can be used to realize military applications and so on. Therefore, it is necessary to study the atmospheric scattering light communication in near infrared light. Firstly, based on the basic theory of scattering and absorption in atmospheric optics and using the single scattering theory model, the theoretical transmission model of the system link in near-infrared atmospheric scattering light communication is established. The influence of scattering and absorption and the function of scattering phase function in the scattering process are discussed in this model. In the ellipsoidal coordinate system, the theoretical model of the influence of physical parameters on the whole system is studied. The relationship between geometry and system structure parameters affecting the received power is described in detail. Secondly, based on the theoretical model, the effects of geometric parameters on the received power and path loss are studied. The simulation results show that the near infrared wavelength can be selected for communication. In the near infrared band, the smaller the distance is, the larger the receiving aperture is, and the larger the receiving power is under the given optimal elevation angle. At the same time, the more the value of the transmitting half angle and the receiving half angle is, the bigger the value of the received power is, and the influence of each parameter on the path loss is also discussed in detail. Finally, based on the theoretical model of single scattering, the theoretical requirements of the system for minimum pulse spacing are obtained, and the relationship between the maximum communication data rate and the communication distance under geometric conditions is given. The theoretical models of the transmission power requirements of the communication data rate, communication distance, elevation angle and half angle are discussed, and the simulation results and analysis are given. Combined with the open key (OOK) modulation mode, the theoretical results and analysis of BER are obtained according to the communication rate, and the design scheme of the system is given. The theoretical study will provide the theoretical basis for the subsequent NIR communication experiments, which is of great significance.
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN929.1

【參考文獻】

相關期刊論文 前10條

1 鞏稼民;姜小波;李晨;孟令賀;楊萌;;基于不同散射相函數(shù)的紫外光傳輸特性研究[J];半導體光電;2015年06期

2 裴偉程;徐智勇;汪井源;趙繼勇;;非視距散射光通信研究進展[J];半導體光電;2015年06期

3 林勇;徐智勇;汪井源;宋超;王榮;耿常鎖;;霧環(huán)境下非視距散射光通信最佳鏈路分析[J];紅外與激光工程;2015年02期

4 宋超;徐智勇;汪井源;;云散射模型與信道傳輸特性分析[J];中國激光;2012年02期

5 李浩;孫學金;唐麗萍;;可見光和紅外波段大氣體散射強度特性[J];紅外與毫米波學報;2011年04期

6 魏培智;韋斌;;大氣光散射通信的光學干擾與對抗措施[J];光通信技術;2010年10期

7 王巨勝;侯天晉;周鼎富;;非視線大氣散射傳輸仿真研究[J];激光雜志;2010年03期

8 徐智勇;沈連豐;汪井源;陳章;;紫外散射通信實驗系統(tǒng)及其性能分析[J];東南大學學報(自然科學版);2009年06期

9 何新;楊俊才;賈紅輝;尹紅偉;常勝利;;天氣對光散射傳輸影響的仿真分析[J];光學技術;2009年01期

10 徐素芝;常勝利;賈紅輝;楊俊才;;大氣光散射通信紫外濾光片技術研究[J];光通信技術;2007年08期

相關博士學位論文 前1條

1 趙明宇;紫外光通信大氣傳輸特性和調制技術研究[D];北京郵電大學;2013年

相關碩士學位論文 前6條

1 汪新勇;紫外光通信技術研究與系統(tǒng)實現(xiàn)[D];北京郵電大學;2014年

2 李明;非視距紫外光散射傳輸特性研究[D];西安電子科技大學;2011年

3 馮平興;紫外光通信信道散射模型研究及實驗系統(tǒng)設計[D];電子科技大學;2009年

4 王瑞;激光在霧媒質中的傳播衰減特性研究[D];西安電子科技大學;2007年

5 孫紅圖;空間散射光傳輸特性研究[D];華中科技大學;2007年

6 徐娟;大氣的光散射特性及大氣對散射光偏振態(tài)的影響[D];南京信息工程大學;2005年

，

本文編號：2393601