Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Spectrum sensing for cognitive radio exploiting spectrum discontinuities detection | Guibene et al. EURASIP Journal on Wireless Communications and Networking 2012 2012 4 EURASIP Journal on . http content 2012 1 4 Wireless Communications and Networking a SpringerOpen Journal RESEARCH Open Access Spectrum sensing for cognitive radio exploiting spectrum discontinuities detection Wael Guibene 1 Monia Turki2 Bassem Zayen1 and Aawatif Hayar3 Abstract This article presents a spectrum sensing algorithm for wideband cognitive radio exploiting sensed spectrum discontinuity properties. Some work has already been investigated by wavelet approach by Giannakis et al. but in this article we investigate an algebraic framework in order to model spectrum discontinuities. The information derived at the level of these irregularities will be exploited in order to derive a spectrum sensing algorithm. The numerical simulation show satisfying results in terms of detection performance and receiver operating characteristics curves as the detector takes into account noise annihilation in its inner structure. Keywords cognitive radio spectrum sensing algebraic detection technique low SNRs high performances 1. Introduction During the last decades we have witnessed a great progress and an increasing need for wireless communications systems due to costumers demand of more flexible wireless smaller more intelligent and practical devices explaining markets invaded by smart-phones personal digital assistant PDAs tablets and netbooks. All this need for flexibility and more mobile devices lead to more and more needs to afford the spectral resources that shall be able to satisfy costumers need for mobility. But as wide as spectrum seems to be all those needs and demands made it a scarce resource and highly misused. Trying to face this shortage of radio resources telecommunication regulators and standardization organisms recommended sharing this valuable resource between the different actors in the wireless environment. The federal communications commission FCC
