Please use this identifier to cite or link to this item: http://repositorio.inesctec.pt/handle/123456789/3808
Title: Indoor localization with audible sound - Towards practical implementation
Authors: João Neves Moutinho
Rui Esteves Araujo
Freitas,D
Issue Date: 2016
Abstract: This paper presents an innovative evaluation and comparison of several methods and techniques necessary to implement an indoor localization system based on audible sound. Experiments were conducted in a room with conditions very close to possible practical application demonstrating that time delay estimation using generalized cross-correlation phase transform provides the best estimate to the distance to fixed anchors, and highlight the benefits of a new localization method entitled circle shrinking based on an optimization methodology. Of the three optimization methods tested, Gauss-Newton proves to be the most adequate, and among the three medium access methods evaluated, code division multiple access acoustic transmission provided the best results. A localization system combining these components and using only off-the-shelf hardware reached an average accuracy of 1.3 cm in the central area of the test room with an excitation signal-to-noise ratio as low as 7.2 dB, an almost unperceivable noise like audio signal. These results represent an advance of the state-of-the-art in indoor localization systems, pointing towards the possibility of widespread practical implementation with everyday use components.
URI: http://repositorio.inesctec.pt/handle/123456789/3808
http://dx.doi.org/10.1016/j.pmcj.2015.10.016
metadata.dc.type: article
Publication
Appears in Collections:CPES - Articles in International Journals

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