Title :
Amplify-and-forward relay assisting both primary and secondary transmissions in cognitive radio networks over Nakagami-m fading
Author :
Chu, Thi My Chinh ; Phan, Hoc ; Zepernick, Hans-Jürgen
Author_Institution :
Blekinge Inst. of Technol., Karlskrona, Sweden
Abstract :
In this paper, we study the performance for the primary and secondary transmissions in cognitive radio networks where the amplify-and-forward (AF) secondary relay helps to transmit the signals for both the primary and secondary transmitters over independent Nakagami-m fading. First, we derive exact closed-form expressions for outage probability and symbol error rate (SER) of the primary network. Then, we derive an exact closed-form expression for outage probability and a closed-form expression of a tight upper bound for SER of the secondary network. Furthermore, we also make a comparison for the performance of the primary system with and without the help of the secondary relay. Finally, we show a good agreement between analytical results and Monte-Carlo simulations.
Keywords :
Monte Carlo methods; Nakagami channels; amplify and forward communication; cognitive radio; error statistics; radio transmitters; AF secondary relay; Monte-Carlo simulations; SER; amplify-and-forward secondary relay; closed-form expressions; cognitive radio networks; independent Nakagami-m fading; outage probability; primary network; primary transmissions; primary transmitters; secondary network; secondary transmissions; secondary transmitters; symbol error rate; Closed-form solutions; Error analysis; Fading; Interference; Receivers; Relays; Signal to noise ratio;
Conference_Titel :
Personal Indoor and Mobile Radio Communications (PIMRC), 2012 IEEE 23rd International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
978-1-4673-2566-0
Electronic_ISBN :
2166-9570
DOI :
10.1109/PIMRC.2012.6362918