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- W2908869007 abstract "Indoor localization for pedestrians has gained increasing popularity among the rich body of literature for the last decade. In this paper, a low-cost indoor mapping and localization solution is proposed using the opportunistic signals from ambient indoor environments with a smartphone. It is composed of GraphSLAM-based offline mapping and Bayesian filtering-based online localization using generated signal maps. The GraphSLAM front-end is constructed by motion constraints from pedestrian dead-reckoning (PDR), loop-closure constraints identified by magnetic sequence matching with WiFi signal similarity validation, and observation constraints from opportunistic magnetic headings after error rejection. Globally consistent trajectories are created by graph optimization, after which signal maps (e.g., WiFi, magnetic fields, lights) are generated by Gaussian Processes Regression (GPR) for later localization. We propose to use the pseudo-wall constraints from the GPR variance map of magnetic fields and the lights measurements as observations for particle filtering. The proposed method is evaluated on several datasets collected from both the in-compass office buildings and outside public areas. Real-time localization is demonstrated on a smartphone in an office building covering 2000 square meters with the 50- and 90-percentile accuracies being 2.30 m and 3.41 m, respectively." @default.
- W2908869007 created "2019-01-25" @default.
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- W2908869007 date "2018-10-01" @default.
- W2908869007 modified "2023-09-30" @default.
- W2908869007 title "Indoor Mapping and Localization for Pedestrians using Opportunistic Sensing with Smartphones" @default.
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- W2908869007 doi "https://doi.org/10.1109/iros.2018.8594254" @default.
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