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An optimal positioning algorithm based on polynomial fitting technique for non-line-of-sight (NLOS) environment is presented. First, NLOS errors in TOA measurements are mitigated using an orthogonal polynomial fitting technique. Then the standard deviation of LOS error is exploited to give an optimal location estimation of the mobile station (MS). Performance measure for location accuracy is calculated...
Location determination for mobile devices in wireless environment has gained much attention in the past years. For those location-unaware devices, detecting radio frequency signal strength from outdoor Base Station or indoor Access Point is the most popular method. However, traditional radio map matching scheme suffers from variation and error when the captured wireless signals significantly deviate...
A new trend of mobile wireless services based on trajectory of a mobile phone and hence that of a mobile user, called Mobile Trajectory Based Services (MTBS) is emerging. To provision MTBS, a mobile operator needs to determine the trajectories of a mobile user over a period of time (a week for example) and then save them as mobility profile. There are two major challenges in determining the trajectory...
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