【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。更多还原

【Abstract】 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 principle of satellite navigation and positioning 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.更多还原