Location-based Services: Fundamentals and Operation
Location-based Services: Fundamentals and Operation
A taxonomy for radio location fingerprinting
LoCA'07 Proceedings of the 3rd international conference on Location-and context-awareness
Place lab: device positioning using radio beacons in the wild
PERVASIVE'05 Proceedings of the Third international conference on Pervasive Computing
PerPos: a platform providing cloud services for pervasive positioning
Proceedings of the 1st International Conference and Exhibition on Computing for Geospatial Research & Application
Mobile Augmented Reality: A topometric system for wide area augmented reality
Computers and Graphics
Sensing and classifying impairments of GPS reception on mobile devices
Pervasive'11 Proceedings of the 9th international conference on Pervasive computing
ICDM'11 Proceedings of the 11th international conference on Advances in data mining: applications and theoretical aspects
Proceedings of the 3rd ACM SIGSPATIAL International Workshop on Location-Based Social Networks
The impact of sensor errors and building structures on particle filter-based inertial positioning
Pervasive and Mobile Computing
Indoor pedestrian navigation based on hybrid route planning and location modeling
Pervasive'12 Proceedings of the 10th international conference on Pervasive Computing
Wireless Personal Communications: An International Journal
When assistance becomes dependence: characterizing the costs and inefficiencies of A-GPS
ACM SIGMOBILE Mobile Computing and Communications Review
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It has been considered a fact that GPS performs too poorly inside buildings to provide usable indoor positioning. We analyze results of a measurement campaign to improve on the understanding of indoor GPS reception characteristics. The results show that using state-of-the-art receivers GPS availability is good in many buildings with standard material walls and roofs. The measured root mean squared 2D positioning error was below five meters in wooden buildings and below ten meters in most of the investigated brick and concrete buildings. Lower accuracies, where observed, can be linked to either low signal-to-noise ratios, multipath phenomena or bad satellite constellation geometry. We have also measured the indoor performance of embedded GPS receivers in mobile phones which provided lower availability and accuracy than state-of-the-art ones. Finally, we consider how the GPS performance within a given building is dependent on local properties like close-by building elements and materials, number of walls, number of overlaying stories and surrounding buildings.