Abstract
Recently, RSS fingerprint-based location has been considered as a low-complexity solution for indoor localization. However, constructing a fingerprint map requires a great amount of manual effort to achieve a high location accuracy. In this paper, we present a refinement method to reduce the necessary manual effort without degrading the location accuracy. This method transforms a coarse-gained fingerprint map containing only a small number of offline samples into a high-density fingerprint map by augmenting the map with artificial samples. In particular, a local-to-local strategy is proposed to improve the accuracy of artificial samples. Furthermore, we propose a judgment criterion to determine whether a fingerprint map should continue to be refined when it has reached a certain density and which refined fingerprint map can achieve the best location accuracy. Extensive experimental results show that our proposed method can significantly improve the location accuracy without additional manual effort compared with the original fingerprint map.
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Acknowledgements
This work was supported in part by the National Natural Science Foundation of China (NSFC) under Grant Nos. 60903193, 61370199, 61672379, 61772251 and 61702365, the Tianjin Research Program of Application Foundation and Advanced Technology under Grant No. 12JCQNJC00200 and the Natural Science Foundation of Tianjin under Grant No. 17JCQNJC00700.
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Li, Y., Shi, G., Zhou, X. et al. Reducing the site survey using fingerprint refinement for cost-efficient indoor location. Wireless Netw 25, 1201–1213 (2019). https://doi.org/10.1007/s11276-018-1711-6
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DOI: https://doi.org/10.1007/s11276-018-1711-6