Abstract
2345)6789:; ?(@A8BC2D. $E4FG 23HIJHK:LMNO@PQ(D. %R)SM*+C6(time switching, TS) TCU, (power splitting, PS) 27D. VWX3 ;<C= 'Y 2 $) *+ ,-8./ 4F(D. 8*+C62 Z=:<[:LMNO;<\@C]^8D. _*)!# $%&'Z *+ $)&(D. `aO*bcd 9YJ;G *+ 8.e<DVWX4F(./SMf($) *+ 8ghi_*)!# Aj k lD.AbstractEnergy harvesting technique is an energy charging technique for communication device in energy-constrained environment. Recently, energy harvesting technique that harvests energy from wireless radio frequency signal is proposed. Representatively, there are time switching technique and power splitting technique. This paper proposes an optimal harvesting time allocation scheme in a wireless cognitive relay network when secondary user relay uses energy harvesting technique to transmit information. Secondary user relay receives information and energy simultaneously from the secondary user source’s signal via time switching technique. We aim to maximize the instantaneous throughput by optimizing harvesting time of the secondary user relay. Simulation results show that using optimized harvesting time gets larger instantaneous throughput compared to using constant harvesting time.Keyword : Energy harvesting, time switching, cognitive radio, amplify-and-forward relayingmnWX(Special Paper).=opqWX420r42L, 2015s3t(JBE Vol. 20, No. 2, March 2015)http://dx.doi.org/10.5909/JBE.2015.20.2.215ISSN 2287-9137 (Online) ISSN 1226-7953 (Print)
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