Title :
A Novel Cooperative Spectrum Sensing Algorithm in Cognitive Radio Systems
Author :
Zheng, Xueqiang ; Wang, Jinlong ; Cui, Li ; Chen, Juan ; Wu, Qihui
Author_Institution :
Inst. of Commun. Eng., PLA Univ. of Sci. & Technol., Nanjing
Abstract :
In cognitive radio systems, unlicensed users can use the frequency bands when the licensed users are not present. Hence reliable detection of available spectrum is the foundation of cognitive radio technology. To ensure that the unimpaired operation of licensed users and to improve the spectrum sensing performance, a novel cooperative spectrum sensing algorithm based on credibility is proposed. In particular, the close-form expressions for the probability of the detection and the false-alarm is derived for the novel algorithm, and the expression for the average overhead used for cooperation is given in the performance analysis. The conclusion is proved by computer simulations.
Keywords :
cognitive radio; cooperative systems; probability; close-form expressions; cognitive radio systems; cooperative spectrum sensing; detection probability; false-alarm; unimpaired operation; unlicensed users; Base stations; Cognitive radio; Computer simulation; Frequency; Performance analysis; Programmable logic arrays; Radio spectrum management; Reliability engineering; Signal processing; Wireless networks;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on
Conference_Location :
Dalian
Print_ISBN :
978-1-4244-2107-7
Electronic_ISBN :
978-1-4244-2108-4
DOI :
10.1109/WiCom.2008.302
