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Open AccessArticle

In-Band Full-Duplex Relaying for SWIPT-Enabled Cognitive Radio Networks

1
School of Electronic Engineering & Department of ICMC Convergence Technology, Soongsil University, Seoul 06978, Korea
2
Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
*
Author to whom correspondence should be addressed.
Electronics 2020, 9(5), 835; https://doi.org/10.3390/electronics9050835
Received: 30 April 2020 / Revised: 13 May 2020 / Accepted: 15 May 2020 / Published: 20 May 2020
(This article belongs to the Special Issue Wireless Power/Data Transfer, Energy Harvesting System Design)
This paper studies sum rate maximization of a cognitive radio network, where a full-duplex relay (FDR) is considered to assist data transmission. An FDR equipped with multiple transmit/receive antennas is introduced to harvest energy from the radio frequency signal of the primary system to reuse the energy for its own data transmission. By exploiting the time-switching relaying protocol, we first formulate an optimization problem for the sum rate of primary and secondary receivers and then propose a low-complexity algorithm to find the optimal solution. Numerical results verify the effectiveness of the proposed technique for wireless information and power transfer in cognitive radio systems. View Full-Text
Keywords: cognitive radio; energy harvesting; full-duplex relay; simultaneous wireless information and power transfer (SWIPT); zero-forcing precoding cognitive radio; energy harvesting; full-duplex relay; simultaneous wireless information and power transfer (SWIPT); zero-forcing precoding
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Nguyen, H.V.; Nguyen, V.-D.; Shin, O.-S. In-Band Full-Duplex Relaying for SWIPT-Enabled Cognitive Radio Networks. Electronics 2020, 9, 835.

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