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Distributionally Robust Physical Layer Secrecy Design for Full-Duplex Two-Way Relay System
Distributionally Robust Physical Layer Secrecy Design for Full-Duplex Two-Way Relay System
- Source :
- GLOBECOM Workshops
- Publication Year :
- 2017
- Publisher :
- IEEE, 2017.
-
Abstract
- This paper deals with the physical-layer (PHY) security problem for a full-duplex (FD) two-way relay system, where two FD sources exchange confidential information through an FD relay. Assuming imperfect channel state information (CSI) of the eavesdropper (Eve), we aim for a robust amplify-andforward (AF) relaying scheme that maximizes the sum secrecy rate of the two-way transmissions. Different from the widely used norm-bounded deterministic error model and the Gaussian random error model, we adopt a moment-based random error model to capture the imperfection of Eve's CSI. Specifically, the CSI error is assumed to be randomly distributed with given mean and covariance, but the exact distribution or other highorder statistics are not known. Under this moment-based error model, we formulate an outage-constrained sum secrecy rate maximization (OC-SRM) problem, which guarantees the outage sum secrecy rate is kept below certain threshold for arbitrary distributions fulfilling the mean and covariance. To tackle this OC-SRM problem, we first reexpress the outage probability into a more explicit form, and then develop a semidefinite relaxation (SDR)-based alternating difference-of-concave (DC) programming approach to computing a safe solution. Simulation results corroborate the robustness of the proposed design when varying the Eve's CSI error distribution.
- Subjects :
- 021110 strategic, defence & security studies
Computer science
Gaussian
Physical layer secrecy
0211 other engineering and technologies
020206 networking & telecommunications
02 engineering and technology
Covariance
law.invention
symbols.namesake
Robustness (computer science)
PHY
Relay
law
0202 electrical engineering, electronic engineering, information engineering
symbols
Algorithm
Computer Science::Cryptography and Security
Computer Science::Information Theory
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- 2017 IEEE Globecom Workshops (GC Wkshps)
- Accession number :
- edsair.doi...........5fad1914cbd31132f89dfa5ae596ba16
- Full Text :
- https://doi.org/10.1109/glocomw.2017.8269116