Spectra Hole Detection and Simulation

Cognitive radio system was the expansion of the software radio system.It offered the opportunity to use dynamic spectra management techniques to sense the environment around the receiver,help prevent interference,adapt to immediate local spectra availability by creating time and location dependent in "virtual unlicensed bands".This paper focused on the key technologies of cognitive radio,and gave a realization of cognitive radio receiver.Each module of the receiver system was designed in this paper.The most important key technology,spectra sensing,was simulated by Matlab,and the control program of spectra sensing was also designed by C programming language.