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
1392
3
1
gregorian
2013
6
1
5
2
online
1
fulltext
fa
Cooperative Filter-and-Forward Beamforming in Cognitive Radio Relay Networks
فناوری اطلاعات
Information Technology
پژوهشي
Research
<p>In this paper, the Filter-and-Forward strategy is developed for cooperative relays in Cognitive Radio networks with underlay structure and frequency selective fading channels. A cost function is defined to minimize the required transmitting power of the relay networks and the secondary user. This is performed subject to keeping the power of noise and interferences at the primary receiver less than a predefined limit and an SINR above a given threshold. In this structure, a power control is also carried out on the secondary transmitter. Simulation results show that the proposed algorithm converges to an optimal solution based on the interior point method. The results show that compared to the Amplify-and-Forward strategy, we achieve a higher SINR threshold in the secondary receiver and need a lower transmitting power at the relays and secondary transmitter.</p>
cognitive radio, cooperative beamforming, Filter-and-Forward, power control, convex optimization, frequency selective channel
11
17
http://ijict.itrc.ac.ir/browse.php?a_code=A-10-27-128&slc_lang=fa&sid=1
Saeideh
Mohammadkhani
1003194753284600444
1003194753284600444
Yes
Mohammad Hossein
Kahaei
1003194753284600445
1003194753284600445
No
Seyed Mohammad
Razavizadeh
1003194753284600446
1003194753284600446
No