A Hybrid Modeling for WLAN Positioning System
The wireless-LAN positioning system (WPS) is an indoor positioning system, which uses the wireless local area networks infrastructure to determine the position of the user with mobile terminal. There are essentially two kinds of signalstrength- based modeling for WPS: propagation modeling and fingerprinting modeling. Since the indoor environment is very complicated and changeful, it is very difficult to fit the signal strength distribution nicely using mathematical formula in propagation modeling. The problem with fingerprinting modeling is that it takes much effort and time to build the coordinate-signal strengths maps for each WLAN. The proposed hybrid modeling has three stages. Firstly, establish a database that contains a distance-signal strength map of the interesting area. Secondly, use the database to obtain an estimate of the distances between mobile terminal and base stations. Thirdly, apply the trilateration to compute the mobile terminal position. Experimental results show that the mean position error is much better than propagation modeling and database establishment is simpler than fingerprint modeling.
component positioning system WLAN signal strength
Hongpeng WANG Fei JIA
Mobile Computing Research Center Harbin Institute of Technology Shenzhen Graduate School Shenzhen, China
国际会议
上海
英文
2007-09-21（万方平台首次上网日期，不代表论文的发表时间）