基于WiFi与GPS组合定位算法的无缝定位方法研究  

A Seamless Positioning Method Research Based on Wireless Local Area Network(WiFi)and GPS

作　　者：马燕[1,2] 袁蔚林[3] 陈秀万[1] 许玉斌[1] 孙华波 

机构地区：[1]北京大学遥感与地理信息系统研究所,北京100871 [2]中国民航科学技术研究院,北京100028 [3]中国国土资源航空物探遥感中心,北京100083

出　　处：《地理与地理信息科学》2013年第3期6-9,16,共5页Geography and Geo-Information Science

基　　金：国家科技支撑计划项目(2011BAH05B08);中国地质调查局地质调查工作项目(12120113099200)

摘　　要：无线局域网络(WLAN)是一种全新的无线信号传输平台,该文在总结目前无缝定位与导航技术的研究现状、分析存在的问题和发展趋势的基础上,提出了联合GPS和无线局域网络的组合定位方法,以实现室内外的无缝定位与导航。同时,在深入研究卫星导航定位和无线传感器网络定位原理与算法基础上,针对定位环境的不同,提出了无缝定位的解决方案、转换机制和切换策略,并以WiFi网与GPS组合定位算法为例,进行了详细分析和深入讨论,所用算法可以实现无GPS、少于4颗可用卫星以及GDOP值不满足定位情况下的定位,与单独WiFi网络定位算法相比,该算法可以提高定位精度。Seamless positioning technology refers to a seamless coverage of various location-based applications on the ground, underground and in outer space. The different positioning technologies can be combined to achieve this goal. Wireless Local Area Network （WLAN） is a new information access platform which can be used to achieve positioning, monitoring and tracking in wide area. Self-positioned of the network node is the basis and prerequisite for most applications, although the current popular WiFi positioning technology is a position solution for WLAN series standard （IEEE802. 11）. In this paper, based on the princi- ple of satellite navigation and posiiioning with wireless sensor networks, the new method of combining GPS and WiFi networks is put forward to achieve seamless positioning and navigation. And the potential problems of existed technology are conducted in-depth discussion by summing up the seamlessly, current location and navigation technology, as well as analyzing existed problems and trends. Finally, the WiFi network assisted GPS positioning algorithm is analyzed in detail.

关 键 词：无缝定位 全球定位系统(GPS) 无线保真技术(WiFi) 接收信号强度(RSSI) 联邦卡尔曼滤波 

分 类 号：P228.4[天文地球—大地测量学与测量工程]