Research Article
Spectrum Sensing for Dynamic Spectrum Access of TV Bands
@INPROCEEDINGS{10.1109/CROWNCOM.2007.4549801, author={Carlos Cordeiro and Monisha Ghosh and Dave Cavalcanti and Kiran Challapali}, title={Spectrum Sensing for Dynamic Spectrum Access of TV Bands}, proceedings={2nd International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications}, publisher={IEEE}, proceedings_a={CROWNCOM}, year={2008}, month={6}, keywords={MAC cognitive radio dynamic spectrum access protocol spectrum sensing}, doi={10.1109/CROWNCOM.2007.4549801} }- Carlos Cordeiro
Monisha Ghosh
Dave Cavalcanti
Kiran Challapali
Year: 2008
Spectrum Sensing for Dynamic Spectrum Access of TV Bands
CROWNCOM
IEEE
DOI: 10.1109/CROWNCOM.2007.4549801
Abstract
In this paper we address the issue of spectrum sensing in cognitive radio based wireless networks. Spectrum sensing is the key enabler for dynamic spectrum access as it can allow secondary networks to reuse spectrum without causing harmful interference to primary users. Here we propose a set of integrated medium access control (MAC) and physical layer (PHY) spectrum sensing techniques that provide reliable access to television (TV) bands. At the MAC level, we propose a two-stage spectrum sensing that guarantees timely detection of incumbents while meeting the quality of service (QoS) requirements of secondary users. At the PHY level, we introduce FFT-based pilot energy and location detection schemes that can detect a TV signal on a TV channel at levels as low as -116 dBm. We have evaluated these schemes through simulation and prototyping and show their effectiveness, reliability, and efficiency. These mechanisms are also part of the current IEEE 802.22 draft standard which is based on cognitive radio technology.
