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Power-Absorption-Based Model for Power Compensation in WLAN Positioning Using Smartphone

Masaaki YAMAMOTO, Tomoaki OHTSUKI

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Summary :

To achieve accurate wireless-local-area-network (WLAN) positioning, the directivity and influence of multipath fading on the power absorption by the user are clarified experimentally. Based on the results, a general model of the power absorption by the user is devised. The parameters of the model are estimated using maximum-likelihood estimation (MLE) and the magnetic sensor built into modern smartphones. The proposed method compensates the power absorption and the influence of multipath fading. According to experimental evaluations, the root-mean-square error (RMSE) of the proposed method is 34% lower than that of the conventional one. Namely, RMSE of the proposed method is 1.94m in a room.

Publication
IEICE TRANSACTIONS on Communications Vol.E98-B No.6 pp.1125-1132
Publication Date
2015/06/01
Publicized
Online ISSN
1745-1345
DOI
10.1587/transcom.E98.B.1125
Type of Manuscript
PAPER
Category
Sensing

Authors

Masaaki YAMAMOTO
  Hitachi, Ltd.,Keio University
Tomoaki OHTSUKI
  Keio University

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