Title :
Opportunistic relaying with wireless energy harvesting in a cognitive radio system
Author :
Van-Dinh Nguyen ; Son Dinh-Van ; Oh-Soon Shin
Author_Institution :
Sch. of Electron. Eng., Soongsil Univ., Seoul, South Korea
Abstract :
In this paper, the performance of opportunistic relay selection (ORS) in a cognitive radio is analyzed over flat Rayleigh fading channels. Data transmission between source and destination is assumed to be entirely performed via the relays. Relay nodes are assumed to have ability to harvest energy from the source signal and use that harvested energy to forward the information to the destination. Specifically, we derive an exact expression for the outage probability of the secondary system considering the maximum transmit power at the secondary transmitter and relays, energy harvesting efficiency at relays, and interference constraint at the primary receiver. Under the assumption of perfect channel state information at the receivers, we evaluate the outage probability of a cognitive radio system with ORS and energy harvesting.
Keywords :
Rayleigh channels; cognitive radio; energy harvesting; fading channels; radio receivers; radio transmitters; radiofrequency interference; relay networks (telecommunication); wireless channels; ORS; channel state information; cognitive radio system; data transmission; energy harvesting efficiency; flat Rayleigh fading channels; harvested energy; interference constraint; opportunistic relay selection; outage probability; primary receiver; relay nodes; secondary relays; secondary transmitter; wireless energy harvesting; Cognitive radio; Data communication; Energy harvesting; Receivers; Relays; Signal to noise ratio; Energy harvesting; cooperative communications; decode-and-forward; outage probability;
Conference_Titel :
Wireless Communications and Networking Conference (WCNC), 2015 IEEE
Conference_Location :
New Orleans, LA
DOI :
10.1109/WCNC.2015.7127450
