Title :
Detection Timing and Channel Selection for Periodic Spectrum Sensing in Cognitive Radio
Author :
Zhou, Xiangwei ; Li, Ye Geoffrey ; Kwon, Young Hoon ; Soong, Anthony C K
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA
Abstract :
In this paper, detection timing and channel selection for periodic spectrum sensing are investigated to improve the performance of cognitive radio (CR) users. Designed to maximize the channel efficiency of CR users under a given level of interference with licensed users, the detection timing scheme utilizes the statistics of the licensed channel occupancy to determine the optimal starting point of each sensing action. A channel selection scheme in the multichannel multiuser environment is also proposed to specify which channel to detect for the upcoming sensing action based on detection timing. Numerical results demonstrate that our schemes considerably improve the overall channel efficiency while protecting the communication among licensed users.
Keywords :
channel allocation; cognitive radio; multiuser detection; spectral analysis; statistical analysis; channel selection; cognitive radio; detection timing scheme; multichannel multiuser environment; periodic spectrum sensing; Chromium; Cognitive radio; Condition monitoring; Interference; Protection; Scheduling; Statistics; Timing; Transmitters; Wireless sensor networks;
Conference_Titel :
Global Telecommunications Conference, 2008. IEEE GLOBECOM 2008. IEEE
Conference_Location :
New Orleans, LO
Print_ISBN :
978-1-4244-2324-8
DOI :
10.1109/GLOCOM.2008.ECP.573
