WiFi/PDR室内分层三维定位技术

doi:10.3969/j.issn.1001-2400.2017.04.029

Abstract

Abstract:

A layered indoor 3D positioning technology based on WiFi positioning and Pedestrian Dead Reckoning (PDR) is proposed to solve the problem that the pedestrian can only get coordinates in the 2D plane and low accuracy of current indoor localization from intelligent terminal. In the PDR location, the pedestrian's horizontal walking or taking up-down stairs can be distinguished by detecting the pitch-rate mutation. Height change of the pedestrian is obtained by using the effective steps and stairs information. The equations of the two different behavior patterns are constructed and three-dimensional PDR is realized. In the part of the filter, a particle filter algorithm combining WiFi, PDR, building information and behavior patterns is proposed. By fusing the building information and behavior models into the weight calculation and the sampling of the particle, the localization precision is effectively improved. The results show that the average error of the horizontal location is 2.6m and the average error of the height estimation is 1.1m, which satisfies the demand of the individual intelligent terminal for the location service, with the elevation parameter enabling the user to recognize floor information.

Key words: indoor position system, three dimensional pedestrian dead reckoning, wireless-fidelity, pitch rate, particle filter

HE Leinan;LU Hu;JI Zhengzhou. 3D indoor floor localization based on WiFi and PDR[J].Journal of Xidian University, 2017, 44(4): 167-173+166.

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3D indoor floor localization based on WiFi and PDR

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