GPS multipath mitigation for urban area using omnidirectional infrared camera

Jun Ichi Meguro, Taishi Murata, Jun Ichi Takiguchi, Yoshiharu Amano, Takumi Hashizume

    Research output: Contribution to journalArticle

    126 Citations (Scopus)

    Abstract

    This paper describes a precision positioning technique that can be applied to vehicles in urban areas. The proposed technique mitigates Global Positioning System (GPS) multipath by means of an omnidirectional infrared (IR) camera that can eliminate the need for invisible satellites [a satellite detected by the receiver but without line of sight (LOS)] by using IR images. Some simple GPS multipath mitigation techniques, such as the installation of antennas away from buildings and using choke ring antennas, are well known. Further, various correlator techniques can also be employed. However, when a direct signal cannot be received by the antenna, these techniques do not provide satisfactory results because they presume that the antenna chiefly receives direct signals. On the other hand, the proposed technique can mitigate GPS multipath, even if a direct signal cannot be received because it can recognize the surrounding environment by means of an omnidirectional IR camera. With the IR camera, the sky appears distinctively dark; this facilitates the detection of the borderline between the sky and the surrounding buildings, which are captured in white, due to the difference in the atmospheric transmittance rate between visible light and IR rays. Positioning is performed only with visible satellites having fewer multipath errors and without using invisible satellites. With the proposed system, static and kinematic evaluations in which invisible satellites are discriminated through observation using an omnidirectional IR camera are conducted. Hence, signals are received even if satellites are hidden behind buildings; furthermore, the exclusion of satellites having large errors from the positioning computation becomes possible. The evaluation results confirm the effectiveness of the proposed technique and the feasibility of highly accurate positioning.

    Original languageEnglish
    Article number4770186
    Pages (from-to)22-30
    Number of pages9
    JournalIEEE Transactions on Intelligent Transportation Systems
    Volume10
    Issue number1
    DOIs
    Publication statusPublished - 2009

    Fingerprint

    Global positioning system
    Cameras
    Satellites
    Infrared radiation
    Antennas
    Electric inductors
    Correlators
    Kinematics

    Keywords

    • Global Positioning System (GPS)
    • Infrared (IR) image sensors
    • Multipath mitigation
    • Self-positioning
    • Urban areas

    ASJC Scopus subject areas

    • Automotive Engineering
    • Computer Science Applications
    • Mechanical Engineering

    Cite this

    GPS multipath mitigation for urban area using omnidirectional infrared camera. / Meguro, Jun Ichi; Murata, Taishi; Takiguchi, Jun Ichi; Amano, Yoshiharu; Hashizume, Takumi.

    In: IEEE Transactions on Intelligent Transportation Systems, Vol. 10, No. 1, 4770186, 2009, p. 22-30.

    Research output: Contribution to journalArticle

    Meguro, Jun Ichi ; Murata, Taishi ; Takiguchi, Jun Ichi ; Amano, Yoshiharu ; Hashizume, Takumi. / GPS multipath mitigation for urban area using omnidirectional infrared camera. In: IEEE Transactions on Intelligent Transportation Systems. 2009 ; Vol. 10, No. 1. pp. 22-30.
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