International Journal of Information and Communication Technology Research
مجله بین المللی ارتباطات و فناوری اطلاعات
International Journal of Information and Communication Technology Research
Engineering & Technology
http://ijict.itrc.ac.ir
1
admin
2251-6107
2783-4425
doi
1652
25391
en
jalali
1390
6
1
gregorian
2011
9
1
3
3
online
1
fulltext
fa
Bayesian-Based Cooperative Framework for Spectrum Sensing in Cognitive Radio Networks
فناوری اطلاعات
Information Technology
پژوهشي
Research
<p>Energy detection has been adopted as an alternative spectrum sensing method for cognitive radios due to its low computational complexity and not requiring a priori information about the signal to be detected. However, noise uncertainty and hidden terminal problem make energy detector practically challenging specially in low signal-to noise ratio (SNR) regime. Collaboration among multiple cognitive radios has been recognized as a practical strategy to improve the reliability of spectrum sensing. In this paper, a cooperative spectrum sensing framework is proposed to blindly determine the occupancy of a wideband spectrum. Specifically, contrary to conventional energy detector, the proposed method does not require any knowledge of noise variance to detect the presence of primary signals. Moreover, diversity achieved by cooperation enables the framework to maintain a reasonable performance even in low SNR values. Simulation results confirm the effectiveness of our proposed method in improving both the probabilities of detection and false alarm.</p>
cognitive radio, cooperative spectrum sensing, energy detection, Generalized Bayesian estimator
11
18
http://ijict.itrc.ac.ir/browse.php?a_code=A-10-27-178&slc_lang=fa&sid=1
Vahid
Jamali Kooshkghazi
1003194753284600586
1003194753284600586
Yes
Nima
Reisi
1003194753284600587
1003194753284600587
No
Mahmoud
Ahmadian
1003194753284600588
1003194753284600588
No
Soheil
Salari
1003194753284600589
1003194753284600589
No