Direction of arrival estimation algorithms for leaky-wave antennas and antenna arrays: Dissertation

    Research output: ThesisDissertationCollection of Articles


    The focus of this thesis is to study direction of arrival (DoA) estimation algorithms for reconfigurable leaky-wave antennas and advanced antenna arrays. Directional antennas can greatly improve the spectrum reuse, interference avoidance, and object and people localization. DoA estimation algorithms have also been shown to be useful for applications such as positioning for user tracking and location-based services in wireless local area networks (WLANs).
    The main goal is to develop novel DoA estimation algorithms for both advanced antenna arrays and composite right/left-handed (CRLH) leaky-wave antennas (LWAs). The thesis introduces novel modifications to existing DoA estimation algorithms and shows how these can be modified for real-time DoA estimation using both antenna types. Three modified DoA estimation algorithms for CRLH-LWAs are presented: 1) modified multiple signal classification (MUSIC), 2) power pattern cross-correlation (PPCC), and 3) adjacent power pattern ratio (APPR).
    Additionally, the APPR algorithm is also applied to advanced antenna arrays.
    The thesis also presents improvements to the modified MUSIC and APPR algorithms. The complexity of the algorithms is reduced by selecting a smaller number of received signals from different directions. The results show that the selection of the radiation patterns is very important and that the proposed algorithms can successfully estimate the DoA, even in a real-world environment. Based on the results, this thesis provides a good starting point for future research of DoA estimation algorithms to enhance the performance of future generation wireless networks and the accuracy of localization.
    Original languageEnglish
    QualificationDoctor Degree
    Awarding Institution
    • University of Oulu
    • Mämmelä, Aarne, Supervisor
    • Iinatti, Jari, Supervisor, External person
    Award date29 Nov 2018
    Print ISBNs978-952-62-2073-4
    Electronic ISBNs978-952-62-2074-1
    Publication statusPublished - 29 Nov 2018
    MoE publication typeG5 Doctoral dissertation (article)


    • adjacent power pattern ratio (APPR) algorithm
    • composite right/left-handed leaky-wave antenna (CRLH-LWA)
    • direction of arrival (DoA) estimation algorithms
    • directional antennas
    • multiple signal classification (MUSIC) algorithm
    • power pattern cross-correlation (PPCC) algorithm
    • APPR-algoritmi
    • MUSIC-algoritmi
    • PPCC-algoritmi
    • suunnanestimointialgoritmit
    • suuntaavat antennit
    • vuotoaaltoantenni (CRLH-LWA)


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