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1、【摘要】定位通常是指确定地球表面某个物体在某一参考坐标系中的位置,无线定位作为定位的一个重要类型,最初也是应用于导航定位系统中。根据接收到的无线电导航台发射信号的强度、相位、时间、频率等参数的变化,用户通过一定的算法计算出自己的位置。当前,无线通信技术飞速发展,在新技术和市场需求的共同作用下,未来无线通信技术的传输熟虑更高,同时更具有安全性、智能性和灵活性,以及更好的传输质量和服务质量。多种多样的无线网络业务也越来越引起人们的关注,无线网络已从原来的互连设备转变成一种多业务承载平台,这其中,获取用户位置则成为实现各项增值业务的关键,各种基于位置信息的移动业务层出不穷。本文在介绍了现有无线传感器
2、网络定位技术的基础上,介绍了无线射频技术 RFID 在定位技术领域中的应用,讨论了根据检测信号强度损耗模型基于距离与不基于距离的两大类算法。列举了定位的主要应用领域。论文着重对基于室内接受信号强度的定位技术进行了探讨。关键词:无线传感器网络;定位技术;射频识别技术;基于距离;不基于距离【Abstract】Positioning is usually refers to determine the surface of the earth, an object in a reference coordinate system, the position of the wireless locat
3、ion as an important type of location, first is also used in navigation and positioning system. According to receive radio beacon signal strength, phase, time, frequency, and the change of the parameters, the user through certain algorithm is out of his position.At present, wireless communication tec
4、hnology, rapid development in new technology and the market demand under the common function of, the future of wireless communication technology transfer, and at the same time is more deliberate higher security, intelligence and flexibility, and better quality and service quality of the transmission
5、. DuoZhong variety of wireless network more business cause the attention of people, wireless network has from the original interconnection equipment into a business platform, among them, the bearing is a position for users realize all kinds of value-added business key, all kinds of location based mo
6、bile business information emerge in endlessly.This paper introduces existing in wireless sensor network positioning technology, on the basis of the introduction to the wireless rf technology in the field of RFID positioning technology, and discussed the application according to the test signal stren
7、gth loss model based on distance and not based on the distance of the two categories algorithm. Lists the positioning of the main application fields. This paper mainly based on indoor accept signal strength to the location of the technology were discussed.Key Words: Wireless sensor network; Location
8、 technology; Radio Frequency Identification; range based;range free目录绪论绪论.- 1 -1.1 室内 GPS 定位技术.- 1 -1.2 室内无线定位技术.- 3 -2 射频识别技术(射频识别技术(RFID) .- 8 -2.1 射频识别技术(RFID)及其特点 .- 8 -2.2 RFID 的组成.- 9 -2.2.1 电子标签.- 9 -2.2.2 阅读器(Reader).- 10 -2.2.3 天线(Antenna).- 11 -2.2.4 后台网络.- 11 -2.3 RFID 的分类.- 11 -2.4 RFID
9、的基本原理.- 12 -2.5 RFID 的基本工作流程.- 13 -2.6 射频信号的耦合类型.- 13 -3 无线传感器网络中的定位系统和算法无线传感器网络中的定位系统和算法 .- 15 -3.1 无线传感器网络定位系统和算法的定性分类.- 16 -3.2 无线传感器网络的定位系统和算法评价标准.- 17 -3.3 无线传感器网络定位技术及算法简析.- 18 -3.3.1 基于距离的定位算法及定位技术.- 18 -3.3.2 距离无关的定位算法定位技术.- 19 -3.4 无线传感器网络典型定位系统.- 21 -4 基于测距的无线网络定位方法基于测距的无线网络定位方法.- 23 -4.1 无线电传播路径损耗模型分析.- 23 -4.2 计算过程 .- 24 -4.3 Euclidean 定位计算.- 26 -4.4 加权质心定位计算.- 27 -4.5 算法过程 .- 28 -5 基于非测距的无线网络定位方法基于非测距的无线网络定位方法.- 32 -5.1 LANDMARC .- 32 -5.2