Title :
Outage and Diversity Analysis of Cognitive Relay Networks with Direct Link under Interference Constraints over Nakagami-M Fading
Author :
Yitong Chen ; Jianhua Ge ; Qifei Bu
Author_Institution :
State Key Lab. of Integrated Service Networks, Xidian Univ., Xi´an, China
Abstract :
Cognitive relaying network is a promising technology to improve spectrum utilization and to enhance the performance in practice. In this paper, with maximal transmit power and peak interference power constraints taken into account, the outage and diversity performance of cognitive relay networks under spectrum sharing environments with direct link is investigated over Nakagami-m fading channels. Employing a selection combining receiver, the signals received from the decode-and-forward relay and from the source are combined. Exact and asymptotic expressions for the outage probability are derived. To gain further insights, we also analyze the diversity and coding gain of the considered system. Finally, simulation results are presented to validate our analytical expressions.
Keywords :
Nakagami channels; cognitive radio; decode and forward communication; diversity reception; network coding; probability; relay networks (telecommunication); Nakagami-M fading; coding gain; cognitive relay networks; decode-and-forward relay; direct link; diversity analysis; interference constraints; maximal transmit power constraints; outage analysis; outage probability; peak interference power constraints; selection combining receiver; spectrum sharing environments; spectrum utilization; Diversity reception; Encoding; Fading; Interference; Receivers; Relay networks (telecommunications);
Conference_Titel :
Computer and Information Technology (CIT), 2014 IEEE International Conference on
Conference_Location :
Xi´an
DOI :
10.1109/CIT.2014.67
