Title :
A Fuzzy Decision Scheme for Cooperative Spectrum Sensing in Cognitive Radio
Author :
Zhang, Hongtao ; Wang, Xiaoxiang
Author_Institution :
Key Lab. of Universal Wireless Commun., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
This paper studies closed-form expression between detect probability and false alarm probability for centralized cooperative network in cognitive radio based on a fuzzy decision scheme. By introducing two thresholds and fuzzy logic values to represent the reliability of the decision results, a novel fuzzy decision scheme for cooperative spectrum sensing is proposed. Analysis and simulations show that the proposed scheme could improve the detect probability effectively under ´AND´ and ´OR´ fusion rules, and reduce the number of cooperating cognitive users which depends on Δλ.
Keywords :
cognitive radio; cooperative communication; fuzzy logic; fuzzy set theory; probability; AND fusion rules; OR fusion rules; centralized cooperative network; closed-form expression; cognitive radio; cooperative spectrum sensing; detect probability; false alarm probability; fuzzy decision scheme; fuzzy logic values; Closed-form solution; Cognitive radio; Detectors; Fuzzy logic; Relays; Reliability;
Conference_Titel :
Vehicular Technology Conference (VTC Spring), 2011 IEEE 73rd
Conference_Location :
Budapest
Print_ISBN :
978-1-4244-8332-7
DOI :
10.1109/VETECS.2011.5956116
