无线激光通信.doc

摘 要 近年来，随着“最后一公里”对高带宽、低成本接入技术的迫切需求，FSO在视距传输、宽带接入中有了新的发展机遇，同时由于光通信器件制造技术的飞速发展，无线光通信设备的制造成本大幅下降，FSO得到越来越多的应用。虽然目前FSO的使用无需通过政府的频率许可（目前无线电频率划分至300GHz，而光波远远超过该频率），但对于无线电管理部门来说，了解这种全新的通信技术的特征和发展趋势是大有裨益的。 In recent years, with the \last mile\ of high bandwidth and low cost and the urgent need of access technology, FSO stadia in transmission, broadband access in the new development opportunity, at the same time as optical components manufacturing technology rapid development, the wireless communication equipment manufacturing cost significantly lower, and FSO get more and more applications. Although at present the use of FSO not through the frequency of the government permission (currently radio frequency division to 300 GHz, and light waves far more than the frequency), but for radio management department for, understand this new communications technology characteristics and development trend of is helpful. By using laser in free space transmission mode of wireless communication between buildings and telecommunications service providers to than the traditional optical transmission speed, lower cost more never, safe and reliable high-speed communications solutions, the realization enterprise and optical fiber infrastructure last kilometer connected. Free space optical transmission (FSO) mainly in the first layer (the physical layer) work, can adapt to any agreement (SONET, SONET/SDH, ATM and FDDI, Ethernet, fast Ethernet). The technology does not rely on communication protocol, after application of the inspection by the customer to install and use. Technical index: 20 M-100 MHz bandwidth; The working distance of 1000 m; Reliability 99.999%; Sensitivity to 40 dBm; The power consumption of the biggest 20 w. Keyword: Wireless laser communication 、the last kilometer、FS , 目录 目录 3 第一章 无线激光通信概述 4 1.1 无线激光通信的概念 4 1.2 无线激光通信的优缺点 4 1.2.1 无线激光通信的优势 4 1.2.2 无线激光通信的缺点 5 1.3 无线激光通信的应用场合 5 1.4 采用无线激光技术组网通信时需要考虑一些必要影响因素 6 1.5 简易无线光通信系统 7 1.5.1 系统组成 8 1.5.2简易无线光通信系统基本解决思路 9 第二章 光无线通信网 10