Detection and Tracking using the 802.11 Wireless Network (Resubmission)

无障碍通信正在成为大多数人日常生活的重要组成部分。商业用户和私人用户都越来越希望能够在任何地点与人联系并获取信息，而不仅仅是在办公室或工作场所。手机令人难以置信的成功进一步提高了用户在这方面的期望。为了满足这种需求，基于无线局域网（LAN）的新一代连接可能性正在建立，称为Wi-Fi。Wi-Fi或无线保真度允许你在家里的椅子上、酒店房间的床上或工作的会议室里连接到互联网，而不需要电线。Wi-Fi是一种像手机一样的无线技术。支持Wi-Fi的电脑在室内和室外发送和接收数据；基站范围内的任何地方。它比最快的有线调制解调器连接速度快几倍，并迅速被安装在许多地方，如公司设施、机场、酒店、咖啡店和其他配备Wi-Fi接入的公共场所。Wi-Fi基于被称为IEEE 802的行业标准技术。这是相对容易和廉价的实施，并被广泛部署在许多公共领域和商业环境。据估计，2004年Wi-Fi卡的出货量将超过3000万张，这说明了这项技术令人印象深刻的增长速度。因此，Wi-Fi传输可以被视为未来广泛可用的本地信号。除了通信方面，这些信号还有可能用于其他目的。特别令人感兴趣的是利用雷达原理探测物体和人的可能性。在传统的雷达中，脉冲是由同一设备发送和接收的。在其最简单的形式，这允许用户检测目标是否存在，以及在脉冲返回之前的时间延迟距离雷达有多远。如果发射器和接收器是分开的，那么处理会稍微复杂一些，但基本原理仍然适用。为此目的使用Wi-Fi传输可能导致从无处不在和可访问的来源发展监视能力。所有的传输都已经可以获得，并且可以设计一个相对简单的接收系统来执行这项任务。这样一个系统可以用于许多目的，包括改善内部和外部安全以及识别和跟踪货物和人员。当然，在将这些相对简单的原则应用于实际情况时，有许多问题需要克服。这个简短的研究旨在证明基本原理的可行性，并研究最新的802.15和802.16技术。本研究旨在证明基于无线局域网的监控系统是一种可行的技术，并概述了全面研究和开发的计划。

Accessible communications are becoming an important part of most peoples everyday life. Both business and private users increasingly expect to be able to contact people and get information from any location, not just while at the office or workplace. The incredible success of the mobile phone has further increased the expectations of users in this area. To cater for this demand, a new generation of connectivity possibilities based on wireless local area networks (LAN's) named Wi-Fi is being established.Wi-Fi, or Wireless Fidelity allows you to connect to the Internet from your chair at home, a bed in a hotel room or a conference room at work without wires. Wi-Fi is a wireless technology like a cell phone. Wi-Fi enabled computers send and receive data indoors and out; anywhere within the range of a base station. It's several times faster than the fastest cable modem connection and is rapidly being installed in many locations, such as corporate facilities, in airports, hotels, coffee shops and other public areas equipped with Wi-Fi access.Wi-Fi is based upon an Industry standard technology known as the IEEE 802. This is relatively easy and inexpensive to implement and is being widely deployed in many public areas and commercial settings. It has been estimated that over 30 million Wi-Fi cards would ship in 2004 illustrating the impressive rate of growth of this technology. Wi-Fi transmissions can thus be viewed as a future, widely available local area signal. Apart from the communications aspect, these signals have the potential to be used for other purposes. Particularly of interest is the possibility of detecting objects and people using the principles of Radar. In conventional Radar pulses are transmitted and received by the same equipment. In its simplest form this allows the user to detect whether a target is present and how far away from the radar it is by the time delay before the pulse is returned. IF the transmitter and receiver are separated then the processing is slightly more complex but the basic principles still apply.Using Wi-Fi transmissions for this purpose could lead to the development of a surveillance capability from a ubiquitous and accessible source. All the transmissions would already be available and a relatively simple receiver systems could be designed to carry out this task. Such a system could have be used for many purposes including improving internal and external security and identification and tracking of goods and people.There are, of course, many problems to be overcome in applying these realtively simple principles in a real world situation. This short study is inended to demonstrate the feasibility of the basic principle and investigate also investigate the newer 802.15 and 802.16 technologies. This research will aim to demonstrate that a surveillance system based on wireless LAN's is a viable technogy and outline a plan for full scale research and development.