Indoor Positioning Using GPS Revisited
نویسندگان
چکیده
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 signalto-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.
منابع مشابه
Indoor Positioning Based on Global Positioning System Signals
The Global Positioning System (GPS) is highly reliable and accurate when used outdoors. However, in indoor environments, due to the additional signal loss incurred by the walls of the buildings, the detection and decoding of GPS signals becomes a difficult task. As a solution to the indoor area coverage problem, an indoor positioning system based on GPS repeaters and a modified positioning algo...
متن کاملA New Indoor Positioning System Architecture Using GPS Signals
The pseudolite system is a good alternative for indoor positioning systems due to its large coverage area and accurate positioning solution. However, for common Global Positioning System (GPS) receivers, the pseudolite system requires some modifications of the user terminals. To solve the problem, this paper proposes a new pseudolite-based indoor positioning system architecture. The main idea i...
متن کاملIPS - Indoor Positioning System with Wireless Sensors
Recent developments in the area of ubiquitous and pervasive computing emphasize the interest in context-aware applications. Location is probably the most important context. Indoor location estimation and tracking remains challenging due to the lack of usable and cost-effective technologies. GPS has proved itself for outdoor usage, but it is not suitable for indoor applications due to poor cover...
متن کاملClassification of indoor-outdoor location using combined global positioning system (GPS) and temperature data for personal exposure assessment
OBJECTIVES The objectives of this study was to determine the accuracy of indoor-outdoor classification based on GPS and temperature data in three different seasons. METHODS In the present study, a global positioning system (GPS) was used alongside temperature data collected in the field by a technician who visited 53 different indoor locations during summer, autumn and winter. The indoor-outd...
متن کاملLocalization based User Tracking Using RSSI Fingerprint
To provide an accurate location many location systems with different technologies such as Wi-Fi, Beacon, GPS, etc,. can be used for indoor localization. One of the Biggest Challenges in indoor localization system is to determine the actual indoor position of the user using smart device (Mobile Phone). To design and implement an indoor localization system based on Received Signal Strength Indica...
متن کامل