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Performance Enhancement of TOA Localized Wireless Sensor Networks

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Abstract

Randomly deployed sensor nodes can form a wireless sensor network (WSN) in order to track changes in a certain physical quantity. These sensors can exchange the measurement data with themselves and with an outer interface. The measured data may be a location specific. Therefore, the localization in WSNs becomes a necessity. This localization can be carried out by using a lot of measurement models. These models include; time of arrival (TOA), time difference of arrival (TDOA), direction of arrival (DOA), and received signal strength. TOA and TDOA based localization can offer a very good accuracy than the other types. In this paper, the cooperative TOA localization with virtual anchors selection is proposed in order to increase the accuracy of the localization procedure. The proposed cooperative TOA procedure is explained and mathematically analyzed based on linear least square algorithm. Simulation results show that the proposed cooperative TOA can reduce the mean square positioning error. Furthermore, it is more tolerable to noise and errors than the ordinary TOA. In addition, it can provide a 3 dB performance over the ordinary TOA method.

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Authors and Affiliations

  1. Faculty of Electronic Engineering, Menoufia University, Menouf, Egypt

    Mohamed Shalaby, Mona Shokair & Nagy Wadie Messiha

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  1. Mohamed Shalaby
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  2. Mona Shokair
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  3. Nagy Wadie Messiha
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Correspondence to Mohamed Shalaby.

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Shalaby, M., Shokair, M. & Messiha, N.W. Performance Enhancement of TOA Localized Wireless Sensor Networks. Wireless Pers Commun 95, 4667–4679 (2017). https://doi.org/10.1007/s11277-017-4112-8

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  • DOI: https://doi.org/10.1007/s11277-017-4112-8

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