Research Article
A New Spectrum Sensing Scheme Using Overlap FFT Filter-bank for Dynamic Spectrum Access
@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
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.