Title :
A non-interfering cognitive radio system for spectrum sharing
Author :
Kwon, Yang-Soo ; Kim, Hyeon-Su ; Yoo, Jae-Ho ; Chung, Jae-Hak
Author_Institution :
Dept. of Electron. Eng., Inha Univ., Incheon, South Korea
Abstract :
We present a cognitive radio beamformer for spectrum sharing with primary users. The proposed method generates orthogonal multiple beams for cognitive users using orthogonal subspaces and opportunistic beamforming methods to increase the sum-rate of cognitive radio systems. Simulations demonstrate that the proposed scheme does not cause interference for the primary users and provides a sum-rate capacity of 2.72bps/Hz for up to 20 cognitive users with two transmit antennas.
Keywords :
antenna arrays; array signal processing; cognitive radio; frequency allocation; transmitting antennas; noninterfering cognitive radio system; opportunistic beamforming; orthogonal multiple beam; orthogonal subspace; spectrum sharing; transmit antenna; Array signal processing; Chromium; Cognitive radio; Frequency; Hilbert space; Interference; MIMO; Signal to noise ratio; Transmitting antennas; Virtual colonoscopy;
Conference_Titel :
Communications and Information Technology, 2009. ISCIT 2009. 9th International Symposium on
Conference_Location :
Icheon
Print_ISBN :
978-1-4244-4521-9
Electronic_ISBN :
978-1-4244-4522-6
DOI :
10.1109/ISCIT.2009.5341162
