Performance evaluation of spectrum sensing using welch periodogram for OFDM signals

Ilkka Harjula, Atso Hekkala, Marja Matinmikko, Miia Mustonen

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

    5 Citations (Scopus)

    Abstract

    Reliable spectrum sensing is one of the key technologies for enabling spectrum coexistence. In this paper, co operative spectrum sensing based on the Welch periodogram is studied in frequency selective fading environment for quadrature phase shift keying (QPSK) and orthogonal frequency division multiplexing (OFDM) signals. Parameter selection for sensing OFDM signal is discussed, and near-optimal values for frequency averaging for QPSK and OFDM signals are derived. The results, given as receiver operating characteristic (ROC) curves, indicate that the frequency-selective fading degrades the performance of the sensing. This could be compensated by co-operation of several sensing nodes. Both analytical and simulation results indicate that best performance of spectrum sensing is achieved with different combining rules in the case of signal passing through additive white Gaussian noise (AWGN) or fading channels. (11 refs.)
    Original languageEnglish
    Title of host publicationProceedings of the IEEE 73rd Vehicular Technology Conference, VTC Spring 2011
    Place of PublicationPiscataway, NJ, USA
    PublisherIEEE Institute of Electrical and Electronic Engineers
    Number of pages5
    ISBN (Electronic)978-1-4244-8331-0
    ISBN (Print)978-1-4244-8332-7, 978-1-4244-8329-7
    DOIs
    Publication statusPublished - 2011
    MoE publication typeA4 Article in a conference publication
    EventIEEE 73rd Vehicular Technology Conference, VTC Spring 2011 - Yokohama, Japan
    Duration: 15 May 201118 May 2011

    Conference

    ConferenceIEEE 73rd Vehicular Technology Conference, VTC Spring 2011
    Abbreviated titleVTC Spring 2011
    CountryJapan
    CityYokohama
    Period15/05/1118/05/11

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