6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications

Research Article

A New Spectrum Sensing Scheme Using Overlap FFT Filter-bank for Dynamic Spectrum Access

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  • @INPROCEEDINGS{10.4108/icst.crowncom.2011.245908,
        author={Takanori Sato and Masahiro Umehira},
        title={A New Spectrum Sensing Scheme Using Overlap FFT Filter-bank for Dynamic Spectrum Access},
        proceedings={6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications},
        publisher={IEEE},
        proceedings_a={CROWNCOM},
        year={2012},
        month={5},
        keywords={Dynamic Spectrum Access Spectrum Sensing Overlap FFT Filter-bank Periodogram},
        doi={10.4108/icst.crowncom.2011.245908}
    }
    
  • Takanori Sato
    Masahiro Umehira
    Year: 2012
    A New Spectrum Sensing Scheme Using Overlap FFT Filter-bank for Dynamic Spectrum Access
    CROWNCOM
    IEEE
    DOI: 10.4108/icst.crowncom.2011.245908
Takanori Sato1,*, Masahiro Umehira1
  • 1: Ibaraki University
*Contact email: 10nm674r@hcs.ibaraki.ac.jp

Abstract

A periodogram scheme, a multi-taper scheme, and a filter-bank scheme are proposed for spectrum sensing for dynamic spectrum access. The filter-bank scheme is advantageous in hardware implementation since the hardware required for communications can be reused for spectrum sensing. However, it is difficult for the conventional filter-bank scheme to change the detection bandwidth, filter type and frequency channel since the conventional filter-bank is based on time domain signal processing. This paper proposes a new spectrum sensing scheme using overlap FFT filter-bank based on frequency domain signal processing, which can flexibly change the detection bandwidth, filter type and frequency channel. In addition, this paper proposes a windowing method to improve the false-detection performance and confirms its improvement by computer simulation. Furthermore, false-detection and miss-detection performance of the proposed spectrum sensing scheme are evaluated and compared with those of the periodogram scheme according to the roll-off factor of the filter and modulation scheme.