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Investigation of TOA/TDOA localization in the presence of receiver sensor position error

Fujioka, T. (2022) Investigation of TOA/TDOA localization in the presence of receiver sensor position error.

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Abstract:In light of growing use of self-navigation robots and potential application of unmanned arial vehicles (UAVs), the accurate radio localization is becoming ever more and more crucial. Among other things, localization accuracy is sensitive to the accurate knowledge of receiver sensor positions. This paper studies performance of time-of-arrival (TOA) and time-difference-of-arrival (TDOA) localization with square and triangular sensor deployments in the presence of random errors in sensor positions due to the mobility of sensor nodes. It begins with the derivations of Cramer-Rao lower bound (CRLB) and three closed-form estimation methods namely linear least squares (LLS), weighted linear least squares (WLLS) and 2-step weighted linear least squares (2WLLS). Then, simulations of the TOA- and TDOA-based localization using the 2WLLS with both deployments are conducted and the comparisons of the root-mean-square position errors (RMSEs) are made. The comparison shows that the highest accuracy is achieved by the TOA-based localization with the square deployment, followed by the TDOA-based localization with the square deployment. The accuracy of the latter however, differs by only 0.31dB for the low sensor position error.
Item Type:Essay (Bachelor)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:31 mathematics, 50 technical science in general, 54 computer science
Programme:Electrical Engineering BSc (56953)
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