A spatial and spectral detection approach for primary user interference mitigation in cognitive radios

Author

Lee, E.W.T. ; Vinod, A.P.

Author_Institution

Sch. of Comput. Eng., Nanyang Technol. Univ., Singapore, Singapore

fYear

2011

fDate

13-20 Aug. 2011

Firstpage

1

Lastpage

4

Abstract

The objective of cognitive radio (CR) is to allow utilization of unused frequency bands allocated to Primary Users (PUs) by Secondary Users (SUs) while maintaining negligible interference to PUs. This paper proposes a method for interference avoidance to PUs by combining beamforming based spatial signal processing and compressed sensing technique with Fast Filter Bank based spectral signal processing. Simulation results show that if a frequency band for SU is selected such that it is adjacent to a PU, with the aid of diversity gained from spatial signal processing, the interference by SUs to PUs can be further reduced by at least 20dB.

Keywords

array signal processing; cognitive radio; direction-of-arrival estimation; cognitive radios; compressed sensing technique; fast filter bank; interference avoidance; primary user interference mitigation; secondary users; spatial detection approach; spatial signal processing; spectral detection approach; unused frequency bands; Array signal processing; Bandwidth; Compressed sensing; Filter banks; Interference; Spectral analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

General Assembly and Scientific Symposium, 2011 XXXth URSI

Conference_Location

Istanbul

Print_ISBN

978-1-4244-5117-3

Type

conf

DOI

10.1109/URSIGASS.2011.6050530

Filename

6050530