5th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications

Research Article

Reappearing primary user detection in FBMC/OQAM cognitive radios

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  • @INPROCEEDINGS{10.4108/ICST.CROWNCOM2010.9234,
        author={Tero Ihalainen and Ari Viholainen and Tobias Hidalgo Stitz and Markku Renfors},
        title={Reappearing primary user detection in FBMC/OQAM cognitive radios},
        proceedings={5th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications},
        publisher={IEEE},
        proceedings_a={CROWNCOM},
        year={2010},
        month={9},
        keywords={Analytical models Monitoring Receivers Sensors Signal to noise ratio Transient analysis},
        doi={10.4108/ICST.CROWNCOM2010.9234}
    }
    
  • Tero Ihalainen
    Ari Viholainen
    Tobias Hidalgo Stitz
    Markku Renfors
    Year: 2010
    Reappearing primary user detection in FBMC/OQAM cognitive radios
    CROWNCOM
    IEEE
    DOI: 10.4108/ICST.CROWNCOM2010.9234
Tero Ihalainen1,*, Ari Viholainen1, Tobias Hidalgo Stitz1, Markku Renfors1
  • 1: Department of Communications Engineering, Tampere University of Technology, P.O. Box 553, FI-33101 Tampere, Finland
*Contact email: tero.j.ihalainen@tut.fi

Abstract

This paper investigates the problem of detecting the reappearance of a primary user signal during ongoing secondary data transmission. The high frequency containment of filter bank multicarrier (FBMC) waveforms is exploited to construct, in spectrally efficient manner, continuous silent subbands within the transmission band for spectrum monitoring. Energy detection is carried out on these monitoring subbands in secondary receivers. The distribution of the test statistic is derived to characterize the detector performance in the transient phase where the reappearance of the primary signal falls arbitrarily within the integration window. The experimental data obtained from an FBMC/OQAM secondary multiplexing testbed verifies the derived analytic model. Further, the impact of the transmit power amplifier nonlinearity on the proposed spectrum monitoring scheme is discussed.