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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Harjula, I., Hekkala, A., Matinmikko, M., & Mustonen, M. (2011). Performance evaluation of spectrum sensing using welch periodogram for OFDM signals. In Proceedings of the IEEE 73rd Vehicular Technology Conference, VTC Spring 2011 IEEE Institute of Electrical and Electronic Engineers . https://doi.org/10.1109/VETECS.2011.5956246