Title :
Exact Outage Performance of Cognitive Relay Networks with Maximum Transmit Power Limits
Author :
Yan, Zhi ; Zhang, Xing ; Wang, Wenbo
Author_Institution :
Sch. of Inf. & Commun. Eng., Beijing Univ. of Posts & Telecommun., Beijing, China
fDate :
12/1/2011 12:00:00 AM
Abstract :
In this letter, considering a cognitive relay network with the maximum transmit power limit in a spectrum sharing scenario, the exact outage probability of secondary system is derived over Rayleigh fading channels, and the theoretical analysis is validated by simulations. The results show that both the maximum transmit power limit and the interference power constraint cause the outage saturation phenomenon, and more relays for secondary system can provide better outage performance.
Keywords :
Rayleigh channels; cognitive radio; probability; radio spectrum management; Rayleigh fading channel; cognitive relay network; exact outage performance; exact outage probability; outage saturation phenomenon; secondary system; spectrum sharing scenario; Cognitive radio; Decoding; Interference; Protocols; Relays; Signal to noise ratio; Simulation; Congtive relay networks; outage probability; outage saturation phenomenon; spectrum sharing;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2011.103111.111563
