Research Article
Spectrum Loading Type Dynamic Spectrum Allocation Technique for Cognitive Radio Systems
@INPROCEEDINGS{10.1109/CROWNCOM.2007.4549857, author={Seiichi Sampei and Shinichi Miyamoto and Shinsuke Ibi}, title={Spectrum Loading Type Dynamic Spectrum Allocation Technique for Cognitive Radio Systems}, proceedings={2nd International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications}, publisher={IEEE}, proceedings_a={CROWNCOM}, year={2008}, month={6}, keywords={Bandwidth Cellular networks Cognitive radio Communication system control Communications technology Computer simulation MIMO OFDM Radio control Signal generators}, doi={10.1109/CROWNCOM.2007.4549857} }- Seiichi Sampei
Shinichi Miyamoto
Shinsuke Ibi
Year: 2008
Spectrum Loading Type Dynamic Spectrum Allocation Technique for Cognitive Radio Systems
CROWNCOM
IEEE
DOI: 10.1109/CROWNCOM.2007.4549857
Abstract
This paper proposes a spectrum loading type dynamic spectrum control technique for broadband cognitive radio systems. In the proposed scheme, based on the detection of available spot-wise spectra, discrete spectrum components of a framed symbol sequence are mapped onto the spot-wise spectra. Two spectrum mapping schemes are proposed; single-RF scheme in which available spot-wise spectra are located so close that the entire spot-wise spectra can be covered by an FFT/IFFT with a reasonable number of FFT points, and multi-RF scheme in which the spot-wise spectra are located far away so that the entire spectra cannot be covered by an FFT/IFFT processor. Computer simulation confirms that the proposed scheme is effective in utilizing spot-wise spectra. Moreover, the proposed scheme is confirmed to be effective in enhancement of co-channel and inter-symbol interference immunity when the number of opportunistically available spot-wise spectra is increased.