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Closed-Form Solution of TDOA-Based Geolocation and Tracking: A Recursive Weighted Least Square Approach

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Abstract

The location determination technique using time difference of arrival (TDOA) measurements has been widely used in the military and observation industry. The accuracy of geolocation estimation is a very significant problem because measurement data are affected by environmental noise. Environmental noise occurs due to measurement error and the non-line of sight (NLOS) problem. This paper presents a Kalman filter-based NLOS section identification method and an iterative estimation of emitter location using the recursive weighted least square (RWLS) algorithm. Using fixed receivers with known locations, we obtain TDOA data that contain environmental noise. We identify the NLOS section of each receiver using a Kalman filter. Using the identified line of sight (LOS) TDOA measurements, we accurately derive the estimated location of an emitter with a fast calculation speed using the proposed RWLS algorithm when we receive additional TDOA data. In order to confirm the performance of the RWLS algorithm, the presented simulation results show that the proposed technique achieves improved accuracy and speed for estimating the emitter location.

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Acknowledgments

This work was supported by the National Research Foundation of Korea(NRF) Grant funded by the Korea government (MSIP) (NRF-2016R1A2B4011369).

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Authors and Affiliations

  1. Department of Electrical Engineering, Sungkyunkwan University, Suwon, 440-746, Korea

    Kyunghyun Lee, Jungkeun Oh & Kwanho You

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  1. Kyunghyun Lee
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  2. Jungkeun Oh
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  3. Kwanho You
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Correspondence to Kwanho You.

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Lee, K., Oh, J. & You, K. Closed-Form Solution of TDOA-Based Geolocation and Tracking: A Recursive Weighted Least Square Approach. Wireless Pers Commun 94, 3451–3464 (2017). https://doi.org/10.1007/s11277-016-3785-8

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  • DOI: https://doi.org/10.1007/s11277-016-3785-8

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