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Precision Improvement of Indoor Wireless Positioning by Considering Clock Offsets and Wireless Synchronization
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 Title & Authors
Precision Improvement of Indoor Wireless Positioning by Considering Clock Offsets and Wireless Synchronization
Lim, Erang; Kang, Jimyung; Lee, Soonwoo; Park, Youngjin; Lee, Woncheol; Shin, Yoan;
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Indoor wireless positioning system uses ranging information of beacons in order to precisely estimate a tag location. To estimate distance between each beacons and tag, the system calculates arrival time of a tag pulse with clock of each beacon including independent clock offset. This clock offset seriously affects the performance of ranging and positioning. We propose in this paper a clock offset compensation method to solve this problem. To verify the performance of the proposed method, we simulated location estimation with random clock offset between -1,000ppm and 1,000ppm, and the result shows that the proposed scheme effectively solves the clock offset problem.
Clock Offset;Calibration;Wireless Positioning;Ranging;Location Estimation;
 Cited by
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