Relay Selections for Cooperative Underlay CR Systems with Energy Harvesting
KAUST DepartmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
Online Publication Date2019-04-02
Print Publication Date2019-06
Permanent link to this recordhttp://hdl.handle.net/10754/631829
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AbstractIn this work, we consider a cooperative underlay cognitive radio system in which one secondary user (S) transmits its data to a secondary receiver with the assistance of multiple relays. In the considered underlay spectrum sharing scenario, the transmit power levers at S and forwarding relays are adjusted simultaneously according to a given threshold interference power that the primary user can tolerate. We also consider that relays adopt threshold decode-and-forward relay scheme and harvest energy from the primary transmitter with finite energy storage capacity under time switching scheme. Three best relay selection schemes, optimal source-relay link with wireless energy harvesting (WEH), optimal relay-destination link with WEH and optimal source-relay-destination link with WEH schemes, are proposed and studied. Closed-form analytical expressions for the outage probability of these three best relay selection schemes are derived, respectively. Finally, our analytical results are verified by Monte-Carlo simulations.
CitationYe J, Liu Z, Zhao H, Pan G, Ni Q, et al. (2019) Relay Selections for Cooperative Underlay CR Systems with Energy Harvesting. IEEE Transactions on Cognitive Communications and Networking: 1–1. Available: http://dx.doi.org/10.1109/TCCN.2019.2908900.
SponsorsThis work was supported in part by the Royal Society project under Grant IEC170324.