This paper investigates the performance of multi-hop Free Space Optical(FSO) communications using serial Decode-and-Forward(DF) relay transmissions.A statistical model for the optical intensity fluctuation at the rece...This paper investigates the performance of multi-hop Free Space Optical(FSO) communications using serial Decode-and-Forward(DF) relay transmissions.A statistical model for the optical intensity fluctuation at the receiver due to the combined effects of atmospheric turbulence-induced fading,mis alignment fading and pass-loss is presented.Under given weather and mis alignment conditions,a closed-form analytical expression for the end-to-end outage probability of serial Decode-and-Forward(DF) multi-hop FSO communications is derived.Numerical results show that the serial DF multi-hop transmission is a promising technology to enhance the performance of FSO communications.Moreover,the derived analytical expression can provide close approximations to the simulation results.展开更多
分析了自由空间光通信(FSO,Free Space Optica Communication)系统在应用中受气象条件影响的因素。试验通过对哈尔滨市区内的一对试验FSO通信系统在各种气象条件下传输性能的的跟踪测试,以极限恶劣天气(沙尘暴、大雪低温)为例,对FSO系...分析了自由空间光通信(FSO,Free Space Optica Communication)系统在应用中受气象条件影响的因素。试验通过对哈尔滨市区内的一对试验FSO通信系统在各种气象条件下传输性能的的跟踪测试,以极限恶劣天气(沙尘暴、大雪低温)为例,对FSO系统在黑龙江省的寒温带气候特征下应用时的传输性能作了试验分析,并得出了相关结论及解决办法。展开更多
自由空间光通信(FSO,Free Space Optical Commun ication)系统在应用中受环境因素影响较大,本文概括分析了FSO安装在室内外通信时的各种影响.通过对一对试验FSO通信系统传输性能的测试,对FSO系统在室内外应用时的传输性能做了试验分析,...自由空间光通信(FSO,Free Space Optical Commun ication)系统在应用中受环境因素影响较大,本文概括分析了FSO安装在室内外通信时的各种影响.通过对一对试验FSO通信系统传输性能的测试,对FSO系统在室内外应用时的传输性能做了试验分析,得出了相关结论及解决办法.展开更多
基金supported by National Key Basic Research Program of China(973 Program)under Grant No.2010CB328000National Natural Science Foundation of China under Grant No.61073168,60972023,61102068+7 种基金China Postdoctoral Science Foundation funded project under Grant No.20110490389Research Fund of National Mobile Communications Research Laboratory,Southeast University under Grant No.2010A06the Open Research Fund of National Mobile Communication Research Laboratory,Southeast University under Grant No.2010D01National Science and Technology Important Special Project under Grant No.2010ZX03003-002,2010ZX03003-004the Open research fund of the State Key Laboratory of Integrated Services Networks,Xidian University under Grant No.ISN12-11NUAA Research Funding under Grant No.NS2011013the Open Research Fund of State Key Laboratory of Advance Optical Communication Systems and Networks under Grant No.2008SH06the Startup Fund of Nanjing University of Aeronautics and Astronautics and Fundation of Graduate Innovation Center in NUAA
文摘This paper investigates the performance of multi-hop Free Space Optical(FSO) communications using serial Decode-and-Forward(DF) relay transmissions.A statistical model for the optical intensity fluctuation at the receiver due to the combined effects of atmospheric turbulence-induced fading,mis alignment fading and pass-loss is presented.Under given weather and mis alignment conditions,a closed-form analytical expression for the end-to-end outage probability of serial Decode-and-Forward(DF) multi-hop FSO communications is derived.Numerical results show that the serial DF multi-hop transmission is a promising technology to enhance the performance of FSO communications.Moreover,the derived analytical expression can provide close approximations to the simulation results.
文摘构建空天地一体化信息网络是第六代通信系统(the Sixth Generation,6G)的重要目标,无线光通信相较于射频(Radio Frequency,RF)通信技术具有容量大、速率高、抗干扰能力强等优势,已成为建立全球无缝覆盖空间网络的重要技术.本文综述了基于自由空间光通信(Free Space Optical Communication,FSOC)的空天地一体化网络国内外建设及相关标准化现状,相较于现有综述文献,涵盖了更多最新研究工作,并针对物理层和上层指出一体化FSOC网络设计需要关注的重要因素,对大气信道建模、“捕获、瞄准和跟踪”(Acquisition Pointing and Tracking,APT)、拓扑控制、路由、资源分配、可靠传输协议、微波协作传输几种重要通信技术进行总结和分析,并指出其未来发展趋势和面临的挑战.
文摘分析了自由空间光通信(FSO,Free Space Optica Communication)系统在应用中受气象条件影响的因素。试验通过对哈尔滨市区内的一对试验FSO通信系统在各种气象条件下传输性能的的跟踪测试,以极限恶劣天气(沙尘暴、大雪低温)为例,对FSO系统在黑龙江省的寒温带气候特征下应用时的传输性能作了试验分析,并得出了相关结论及解决办法。
