1. A New Feedback Scheme for the State-Dependent Wiretap Channel With Noncausal State at the Transmitter
- Author
-
Haonan Zhang, Linman Yu, Chenxu Wei, and Bin Dai
- Subjects
Scheme (programming language) ,General Computer Science ,Computer science ,Gaussian ,feedback ,02 engineering and technology ,Communications system ,noncausal state ,symbols.namesake ,wiretap channel ,0202 electrical engineering, electronic engineering, information engineering ,Electronic engineering ,General Materials Science ,Computer Science::Cryptography and Security ,Computer Science::Information Theory ,computer.programming_language ,Dirty paper channel ,secrecy capacity ,Transmitter ,General Engineering ,Physical layer ,020206 networking & telecommunications ,State dependent ,symbols ,020201 artificial intelligence & image processing ,lcsh:Electrical engineering. Electronics. Nuclear engineering ,State (computer science) ,lcsh:TK1-9971 ,computer ,Communication channel - Abstract
Recently, it has been shown that channel feedback helps to enhance the physical layer security (PLS) of communication systems. The current use of feedback focuses on generating secret keys protecting the transmitted messages, and this feedback scheme is proved to be optimal for some physically degraded channel models. In this paper, we revisit the model of the state-dependent wiretap channel with the noncausal state at the transmitter, which plays an important role in the PLS of the wireless communication systems. We propose a new feedback scheme for this model and show that the proposed new scheme performs better than the already existing secret key-based feedback scheme. The results of this paper are further explained via a Gaussian example.
- Published
- 2019