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Secure two-way communication via a wireless powered untrusted relay and friendly jammer
- Publication Year :
- 2017
-
Abstract
- In this paper, we propose a self-dependent two-way secure communication where two sources exchange confidential messages via a wireless powered untrusted amplify-and-forward (AF) relay and friendly jammer (FJ). By adopting the time switching (TS) architecture at the relay, the data transmission is accomplished in three phases: Phase I) Energy harvesting by the untrusted relay and the FJ through non-information transmissions from the sources, Phase II) Information transmission by the sources and jamming transmissions from the FJ to reduce information leakage to the untrusted relay; and Phase III) Forwarding the scaled version of the received signal from the untrusted relay to the sources. For the proposed system, we derive a new closed-form lower bound expression for the ergodic secrecy sum rate (ESSR). Numerical examples are provided to demonstrate the impacts of different system parameters such as energy harvesting time, transmit signal-to-noise ratio (SNR) and the relay/FJ location on the secrecy performance. The numerical results illustrate that the proposed network with friendly jamming (WFJ) outperforms traditional one-way communication and the two-way without friendly jamming (WoFJ) policy.<br />Comment: 6 pages, 5 figures, IEEE Global Communications Conference 2017 CISS (Accepted)
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.1708.06562
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1109/GLOCOM.2017.8253999