无线红外通信-------外文翻译.doc

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无线红外通信-------外文翻译,i. introductionwireless infrared communications refers to the use of free-space propagation of light waves in the near infrared band as a transmission medium fo...
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此文档由会员 wanli1988go 发布

I. Introduction

Wireless infrared communications refers to the use of free-space propagation of light waves in the near infrared band as a transmission medium for communication(1-3), as shown in Figure 1. The communication can be between one portable communication device and another or between a portable device and a tethered device, called an access point or base station. Typical portable devices include laptop computers, personal digital assistants, and portable telephones, while the base stations are usually connected to a computer with other networked connections. Although infrared light is usually used other regions of the optical spectrum can be used (so the term wireless optical communications" instead of wireless infrared communications" is sometimes used).
Wireless infrared communication systems can be characterized by the application for which they are designed or by the link type, as described below.


I.导言

无线红外通信指的是使用近红外波段的光作为通信传输介质的一种通讯方式(1-3),如图1所示。通信可于一个便携式设备和另一个便携式设备或系留设备之间进行,这样的设备称之为接入点或基站。典型的便携设备包括笔记本电脑,个人数字助理,便携式电话,而基站通常与网络内的其他计算机相连来工作。虽然通常采用红外光,光频谱的其他地区可以使用(所以说,我们一般称为无线光通信,而不是无线红外通信)。
无线红外通信系统可以以他们所设计的应用程序或由链路类型为特征,特点如下所述。

A. 应用
主要的商业应用如下:
1.短期无电缆连接的两个用户之间的信息交流(名片,日程安排,文件共享)。主要的例子是红外线系统(见第4节)。
2.无线局域网(WLAN)提供建筑物内的网络连接工作。这可以是对现有的局域网的延伸,或在没有网络的地方建立网络。主要的例子是IEEE802.11标准(见第4节)。
3.为城域网或校园区网络内的建筑物提供高速网络连接。
4.无线输入和控制设备,如无线鼠标,遥控器,无线游戏控制器,远程电子钥匙。