Title :
A Novel Spectrum Utilization Method for Cognitive Radio Applications
Author :
Gong, Mudan ; Guo, Ronghui
Author_Institution :
Coll. of Inf. Sci. & Technol., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China
Abstract :
A novel spectrum utilization method is proposed for cognitive radio applications, which assume that time-frequency overlapped two-signals coexist on single-channel, and it can improve frequency spectrum utilization. The feasibility of this method can be verified by the carrier recognition algorithm based on second-order cycle cumulants. In this paper, consider any combination of BSPK, QPSK, 8QAM and 16QAM modulation. Simulation results show that the accuracy of carrier frequency estimation is greater than 95% when SNR isn´t less than -5dB. It proves the possibility of distinguishing two signals, that is to say the feasibility of the method.
Keywords :
cognitive radio; frequency estimation; quadrature amplitude modulation; quadrature phase shift keying; radio spectrum management; BSPK; QAM modulation; QPSK; carrier frequency estimation; carrier recognition; cognitive radio; frequency spectrum utilization; second-order cycle cumulants; time frequency overlapped two-signals; Cognitive Radio; carrier frequency estimate; second-order cycle cumulants; spectrum utilization;
Conference_Titel :
Multimedia Communications (Mediacom), 2010 International Conference on
Conference_Location :
Hong Kong
Print_ISBN :
978-0-7695-4136-5
DOI :
10.1109/MEDIACOM.2010.22
