Localization Technique Based On Time Difference Of Arrival For Tracking Application In Wireless Sensor Networks

Salleh, Nur Hidayu (2016) Localization Technique Based On Time Difference Of Arrival For Tracking Application In Wireless Sensor Networks. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Wireless sensor networks (WSNs) consist of massive low power, low cost and low capability of sensor nodes. WSNs can be applied in various applications like event detection, tracking, environmental monitoring and intelligent buildings. In tracking application, the location of the target can be estimated by using trilateration technique based on the known sensor nodes location and parameter measurement such as time of arrival, received signal strength indicator, angle of arrival and time difference of arrival. However due to the nature of wireless signal propagation, the measurement is affected by multipath fading. This leads to uncertainties and inaccurate location estimation. In this project, we propose a Time Difference of Arrival based localization algorithm for WSNs based on linear least square and partial derivatives method derived from the intersection of hyperbolas to estimate the location of a mobile target in the field of interest. The simulations have been done by using Matlab to show the estimate location of the mobile target. The outcomes of this project is the performance evaluation of the developed localization algorithm that are measured in terms root mean square error (RMSE) of the estimated location of the mobile target.

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