Improving localization accuracy: Successive measurements error modeling

Najah Abu Ali, Mervat Abu-Elkheir

    Research output: Contribution to journalArticlepeer-review

    9 Citations (Scopus)

    Abstract

    Vehicle self-localization is an essential requirement for many of the safety applications envisioned for vehicular networks. The mathematical models used in current vehicular localization schemes focus on modeling the localization error itself, and overlook the potential correlation between successive localization measurement errors. In this paper, we first investigate the existence of correlation between successive positioning measurements, and then incorporate this correlation into the modeling positioning error. We use the Yule Walker equations to determine the degree of correlation between a vehicle’s future position and its past positions, and then propose a ρ-order Gauss–Markov model to predict the future position of a vehicle from its past ρ positions. We investigate the existence of correlation for two datasets representing the mobility traces of two vehicles over a period of time. We prove the existence of correlation between successive measurements in the two datasets, and show that the time correlation between measurements can have a value up to four minutes. Through simulations, we validate the robustness of our model and show that it is possible to use the first-order Gauss–Markov model, which has the least complexity, and still maintain an accurate estimation of a vehicle’s future location over time using only its current position. Our model can assist in providing better modeling of positioning errors and can be used as a prediction tool to improve the performance of classical localization algorithms such as the Kalman filter.

    Original languageEnglish
    Pages (from-to)15540-15561
    Number of pages22
    JournalSensors (Switzerland)
    Volume15
    Issue number7
    DOIs
    Publication statusPublished - Jul 1 2015

    Keywords

    • Gauss–Markov model
    • Localization
    • Location prediction

    ASJC Scopus subject areas

    • Analytical Chemistry
    • Biochemistry
    • Atomic and Molecular Physics, and Optics
    • Instrumentation
    • Electrical and Electronic Engineering

    Fingerprint

    Dive into the research topics of 'Improving localization accuracy: Successive measurements error modeling'. Together they form a unique fingerprint.

    Cite this