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LSRR-LA: An Anisotropy-Tolerant Localization Algorithm Based on Least Square Regularized Regression for Multi-Hop Wireless Sensor Networks

1,2,*, 1,2, 2 and 2
1
Jiangsu Key Laboratory of Data Science & Smart Software, Jinling Institute of Technology, Nanjing 211169, China
2
School of Computer Engineering, Jinling Institute of Technology, Nanjing 211169, China
*
Author to whom correspondence should be addressed.
Sensors 2018, 18(11), 3974; https://doi.org/10.3390/s18113974
Received: 30 August 2018 / Revised: 10 November 2018 / Accepted: 12 November 2018 / Published: 15 November 2018
(This article belongs to the Section Sensor Networks)
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Abstract

As is well known, multi-hop range-free localization algorithms demonstrate pretty good performance in isotropic networks in which sensor nodes distribute evenly and densely. However, these algorithms are easily affected by network topology, causing a significant decrease in positioning accuracy. To improve the localization performance in anisotropic networks, this paper presents a multi-hop range-free localization algorithm based on Least Square Regularized Regression (LSRR). By building a mapping relationship between hop counts and real distances, we can regard the process of localization as a regularized regression. Firstly, the proximity information of the given network is measured. Then, a mapping model between the geographical distances and the hop distances is constructed by LSRR. Finally, each sensor node finds its own position via this mapping. The Average Localization Error (ALE) metric is used to evaluate the proposed method in our experiments, and results show that, compared with similar methods, our approach can effectively decrease the effect of anisotropy, thus considerably improving the positioning accuracy. View Full-Text
Keywords: wireless sensor network; multi-hop localization; regression wireless sensor network; multi-hop localization; regression
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Zhao, W.; Shao, F.; Ye, S.; Zheng, W. LSRR-LA: An Anisotropy-Tolerant Localization Algorithm Based on Least Square Regularized Regression for Multi-Hop Wireless Sensor Networks. Sensors 2018, 18, 3974.

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