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

fYear

2010

fDate

7-8 Aug. 2010

Firstpage

71

Lastpage

74

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Multimedia Communications (Mediacom), 2010 International Conference on

Conference_Location

Hong Kong

Print_ISBN

978-0-7695-4136-5

Type

conf

DOI

10.1109/MEDIACOM.2010.22

Filename

5694146