A Smooth Transition Method for Indoor and Outdoor Seamless Positioning of GNSS/Magnetic Combination

doi:10.13474/j.cnki.11-2246.2018.0039

Abstract

Abstract:

In view of the problem that indoor and outdoor seamless positioning at the transition point has low precision and cannot switch smoothly and automatically,this paper combined GNSS(Global Navigation Satellite System) positioning technology and indoor geomagnetic fingerprint nodes to achieve indoor and outdoor seamless positioning and navigation.Due to the decreasing number of the satellites that receivers can search and the increasing GDOP(Geometric Dilution of Precision) value and positioning error from outdoor into indoor,the precision of indoor geomagnetic positioning is better than that of GNSS positioning gradually and can be switched stably by analyzing and calculating the GDOP optimal range value at the two critical positioning points.The simulation results of this experiment show that the positioning precision increased by 85.7% and 82.6% compared with single GNSS positioning or geomagnetic positioning methods,thus realized to achieve the seamless indoor-outdoor positioning with high precision,and filled blanks in the definition of indoor-outdoor seamless positioning switching both at home and abroad.

Key words: GNSS, geomagnetism, GDOP, seamless positioning, smooth transition

CLC Number:

P228

CAI Jin, CAI Chenglin, ZHANG Shougang, MENG Ping. A Smooth Transition Method for Indoor and Outdoor Seamless Positioning of GNSS/Magnetic Combination[J]. 测绘通报, 2018, 0(2): 30-34.

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