Title :
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
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;
Conference_Titel :
General Assembly and Scientific Symposium, 2011 XXXth URSI
Conference_Location :
Istanbul
Print_ISBN :
978-1-4244-5117-3
DOI :
10.1109/URSIGASS.2011.6050530
