Observed time difference of arrival based position estimation for LTE systems: simulation framework and performance evaluation

Authors

DOI:

https://doi.org/10.15587/1729-4061.2020.201382

Keywords:

, LTE, Positioning, Estimation, OTDoA, Time of arrival, Correlation, Monte-Carlo simulation, Multilateration, fading channels, geolocation

Abstract

Precise user equipment (UE) location is paramount for the reliable operation of location-based services provided by mobile network operators and other emerging applications. In this paper, the Long Term Evolution (LTE) network positioning performance based on mobile assist Observed Time Difference of Arrival (OTDoA) method is considered. The received signal time difference (RSTD) measurements are estimated by the UE using dedicated position reference signal (PRS) transmitted in the downlink frame where the reported time measurements are used by the network for location calculation. A simulation framework for the position estimation in LTE networks is presented where the LTE downlink communication link is implemented. The correlation-based method for the time of arrival measurement is used for the implementation of OTDoA. The simulation framework provides different configurations and adjustments for the system and network parameters for evaluating the performance of LTE positioning using OTDoA over multipath fading channels. Different simulation scenarios are conducted to identify the influence of various parameters of LTE system and positioning procedure setup on the positioning accuracy. Simulation results demonstrated that the positioning accuracy is highly affected by the channel fading condition where the accuracy of time of arrival measurements is deteriorated in severe fading environments; however, the positioning accuracy can be significantly improved by increasing the positioning sequences involved in the estimation process either in the frequency domain or in the time domain.

Author Biographies

Abdulrahman Kh. Alhafid, University of Mosul Al Majmoaa str., Mosul, Iraq, 41002

Assistant Lecturer of Electrical Engineering/Electronics and Communications

Department of Electrical Engineering

College of Engineering

Sedki Younis, Ninevah University Al Majmoaa str., Mosul, Iraq, 41002

Lecturer of Computer & Communication Engineering

Department of Computer & Information Engineering

College of Electronics Engineering

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Published

2020-06-30

How to Cite

Alhafid, A. K., & Younis, S. (2020). Observed time difference of arrival based position estimation for LTE systems: simulation framework and performance evaluation. Eastern-European Journal of Enterprise Technologies, 3(9 (105), 20–28. https://doi.org/10.15587/1729-4061.2020.201382

Issue

Vol. 3 No. 9 (105) (2020): Information and controlling system

Section

Information and controlling system

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Copyright (c) 2020 Abdulrhman Khalid Alhafid, Sedki Younis

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