Niu, H;
Zhang, B;
Wong, KK;
Chu, Z;
Zhou, F;
(2019)
Robust AN-Aided Secure Beamforming and Power Splitting in Wireless-Powered AF Relay Networks.
IEEE Systems Journal
, 13
(3)
pp. 2543-2546.
10.1109/JSYST.2018.2828224.
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Abstract
In this letter, we investigate the secrecy design in a wireless-powered amplify-and-forward relay network, where the relay is energy constrained and powered by the signal from the transmitter. Specifically, by adopting the power splitting (PS) scheme at the relay, we investigate the worst-case secrecy rate maximization by jointly designing the relay beamforming matrix, artificial noise covariance, and the PS ratio. However, the formulated problem is highly nonconvex due to the secrecy rate function and the dynamic relay power constraint. By exploiting the hidden convexity, we transform the original problem to a solvable reformulation via the successive convex approximation and constrained concave–convex procedure, which can provide a high-level approximated beamforming solution. Then, an iterative algorithm is proposed to obtain the solution. Numerical results showed the effectiveness of the proposed robust scheme.
| Type: | Article |
|---|---|
| Title: | Robust AN-Aided Secure Beamforming and Power Splitting in Wireless-Powered AF Relay Networks |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/JSYST.2018.2828224 |
| Publisher version: | http://dx.doi.org/10.1109/JSYST.2018.2828224 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Relay networks (telecommunications), Robustness, Array signal processing, Communication system security, Wireless communication, Covariance matrices |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10050928 |
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