An ultra wide band indoor positioning method considering electrical delay

doi:10.13474/j.cnki.11-2246.2022.0100

Abstract

Abstract: Aiming at the problem that many kinds of errors affect the positioning accuracy in UWB positioning system, the errors of UWB indoor positioning are comprehensively analyzed, and the basic function model of UWB indoor positioning is proposed in this paper. The system difference of "electrical delay" and three-dimensional coordinates are regarded as estimated parameters, and the positioning results are obtained by Gauss-Newton iterative algorithm. The experimental results show that the proposed method can effectively eliminate the system deviation. Coordinates measured by the total station are taken as true values in the static experiments, and the positioning errors are 4.1 and 2.3 cm, respectively, which are 64% and 87% higher than that of the existing methods. The dynamic experiment results are closer to the reference trajectory and the maximum error is less than 10 cm.

Key words: ultra wide band, errors, electrical delay, indoor positioning, least square estimation

CLC Number:

P228

ZHAO Yinzhi, ZOU Jingui, CAI Lixian, HUANG Gege. An ultra wide band indoor positioning method considering electrical delay[J]. Bulletin of Surveying and Mapping, 2022, 0(4): 1-5,31.

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