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Precision Improvement of Indoor Wireless Positioning by Considering Clock Offsets and Wireless Synchronization
클럭 오프셋과 무선동기를 고려한 실내 무선측위 정밀도 향상 기법

Erang Lim, Jimyung Kang, Soonwoo Lee, Youngjin Park, Woncheol Lee, Yoan Shin
2012 The Journal of Korean Institute of Communications and Information Sciences  
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
more » ... posed 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.
doi:10.7840/kics.2012.37c.10.894 fatcat:cz5ypa6ssbhabhzxwropog2mbm