Spectrum Sensing for Cognitive Femto Base Stations Using Welch Periodogram

Ilkka Harjula, Atso Hekkala

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    11 Citations (Scopus)

    Abstract

    Reliable spectrum sensing is one of the key technologies for enabling cognitive communications. In this paper, spectrum sensing based on Welch periodogram is applied to a femtocell scenario where cognitive femto base station (FBS) is located in the same frequency band as the surrounding macrocell and neighboring femtocells. Parameters for the femtocell simulations are selected based on 3G Partnership Project (3GPP) contributions to tie this work to on-going femtocell standardization work. Different interference scenarios are also discussed. Spectrum sensing based on Welch periodogram is presented, and two scenarios including a user equipment (UE) located indoor and outdoor are selected for further study. The results, given as receiver operation characteristic (ROC) curves, clarify the practical regions inside of which spectrum sensing is capable of providing reliable results for sensing the presence of the MUE.
    Original languageEnglish
    Title of host publicationProceedings
    Subtitle of host publicationIEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2011
    Place of PublicationPiscataway, NJ, USA
    PublisherIEEE Institute of Electrical and Electronic Engineers
    Pages2305-2309
    ISBN (Electronic)978-1-4577-1348-4
    ISBN (Print)978-1-4577-1346-0
    DOIs
    Publication statusPublished - 2011
    MoE publication typeA4 Article in a conference publication
    Event22nd IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2011 - Toronto, ON, Canada
    Duration: 11 Sep 201114 Sep 2011
    Conference number: 22

    Conference

    Conference22nd IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2011
    Abbreviated titlePIMRC 2011
    Country/TerritoryCanada
    CityToronto, ON
    Period11/09/1114/09/11

    Keywords

    • femtocell
    • LTE
    • cognitive radio
    • spectrum sharing
    • interference avoidance

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