Advanced Location-Based Technologies and Services

Because of the fast elevate within the variety of cellular gadget clients all over the world, location-based companies (LBSs) became pervasive, and the call for for them will keep growing. Exploring contemporary alterations within the know-how and its makes use of, complex Location-Based applied sciences and prone takes an in-depth examine new and current applied sciences, innovations, purposes, and possibilities. lower than the editorial counsel of Hassan Karimi, with contributions from specialists within the box, the publication examines the breadth and intensity of complicated LBS applied sciences and techniques.

The ebook offers updated info on LBSs, together with WiFi fingerprinting, geo-crowdsouring, and placement privateness in addition to software components resembling LBSs for public healthiness, indoor navigation, pedestrian navigation, and ads. Highlights comprise discussions of Location-Based Social Networking (LBSN) and the most recent advancements in geospatial clouds and the way they are often used. It takes a glance into the long run with assurance of rising applied sciences that might form the long run new release of LBSs.

Carefully designed to hide quite a number issues for readers at diverse degrees and with diversified backgrounds, the ebook offers a stability of information among LBS theories, applied sciences, and functions. The quality of the contributions coupled with the intensity of insurance make the ebook an important source for somebody exploring the potential for the most recent advancements in LBSs.

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Older receivers had a limited number of channels (even as little as one), which required sequencing through satellites to acquire enough information for 3D positioning. Modern GPS receivers are based on dedicated channel architecture, where every channel tracks one satellite on the L1 or L2 frequency. 2 GLONASS The Russian satellite navigation system GLONASS (GLObal’naya Navigatsionnay Sputnikovaya Sistema) replicates many of the signal transmission and positioning principles of GPS. GLONASS attained full operating capabilities in 1996 with a full constellation of 24 satellites.

7 How Accurate is GPS? The positioning accuracy of GPS depends on several factors, such as the number and the geometry of the observations collected, the mode of observation (point versus relative positioning), type of observation used (pseudorange or carrier phase), the measurement model used, and the level of biases and errors affecting the observables. Depending on the design of the GPS receiver and the aforementioned factors, the positioning accuracy varies from 17 m to better than 1 cm when carrier phases are used in relative positioning mode.

Another network-centric method applied in LBS is the software-only approach, where no additional hardware on the cell towers (base stations) or the mobile phones (terminals) is required. The method is based on the signal strength model observed for the area. By merging the information about the actual received signal strength (RSS) with the existing (mapped) signal data, the system can predict the user’s location. An important feature of this fingerprinting technique is that it can determine the location of any digital cell phone or wireless device without any modification or add-ons or enhancements to the wireless carrier’s existing network.

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