Title :
Multi-user diversity gain in uplink cognitive radio systems with spectrum sensing reliability
Author :
Kim, Junsu ; Shin, Yoan ; Schober, Robert
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of British Columbia, Vancouver, BC, Canada
Abstract :
In this paper, we investigate the performance of opportunistic scheduling in uplink cognitive radio (CR) systems taking into account the spectrum sensing reliability of each CR user. In uplink CR systems, each secondary transmitter (CR user) has a spectrum sensing responsibility to protect the primary system, and the secondary receiver (base station) schedules the transmission opportunity for each CR user. Unlike non-CR multi-user systems, the spectrum sensing reliability may degrade the achievable multi-user diversity (MUD) gain. We propose novel scheduling schemes taking into account the spectrum sensing reliability and data channel quality simultaneously to improve the MUD gain in uplink CR systems.
Keywords :
cognitive radio; diversity reception; radio links; radio receivers; radio spectrum management; radio transmitters; scheduling; wireless channels; base station; data channel quality; multiuser diversity gain; opportunistic scheduling; scheduling scheme; secondary receiver; secondary transmitter; spectrum sensing reliability; uplink cognitive radio system; Joints; Multiuser detection; Processor scheduling; Reliability; Scheduling; Sensors; Transmitters;
Conference_Titel :
Personal Indoor and Mobile Radio Communications (PIMRC), 2010 IEEE 21st International Symposium on
Conference_Location :
Instanbul
Print_ISBN :
978-1-4244-8017-3
DOI :
10.1109/PIMRC.2010.5672047
