无线激光通信毕业设计论文.doc

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。
利用激光在自由空间传输方式实现建筑物间的无线通信,向电信服务商提供比传统光缆传输速度更决、成本更低、安全可靠的高速通讯解决方案,实现企业与光纤基础设施的最后一公里连通。自由空间光传输(FSO)主要在第一层(物理层)工作,可适应任何协议(、/SDH、ATM、FDDI、以太网、快速以太网)。该技术不依赖于通讯协议,历经实际应用的检验,由客户自行安装使用。技术指标:带宽20M-100MHz;工作距离1000m;%;灵敏度-40dBm;最大功耗20w。
关键字:无线激光通信、最后一公里、FSO
Abstract
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 ponents manufacturing technology rapid development, the munication 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 munications technology characteristics and development trend of is helpful.
By using laser in free space transmission mode of munication between buildings and munications service providers to than the traditional optical transmission speed, lower cost more never, safe and reliable high-munications 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 (, /SDH, ATM and FDDI, , fast ). The technology does not rely munication 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 %; Sensitivity to 40 dBm; The power consumption of the biggest 20 w.
Keyword: Wireless munication 、the last kilometer、FS
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目录
目录 3
第一章无线激光通信概述 4
无线激光通信的概