NDLI: Signal leakage neutralisation in instantaneous non-regenerative relaying networks under channel uncertainty

Content Provider	IET Digital Library
Author	Ho, Zuleita Jorswieck, Eduard
Abstract	In a multi-user wireless network, physical layer security is an important issue, especially when some of the served users are malicious. As these users actively participate in the network, their channel state information can be estimated or feedback, although not perfectly known. With this channel uncertainty, the worst-case signal leakage to eavesdropping users’ needs to be managed. The authors propose a robust instantaneous relay design that improves the worst-case secrecy rate performance, and decompose the problem into two sub-problems: First, the achievable signal leakage or leakage-to-noise ratio region is studied. Second, for fixed signal leakage constraints, the achievable secrecy rate region is computed. To approach the non-convex optimisation problems, the authors propose to iteratively solve for the phases and magnitudes of the equivalent channel matrix, a function of the relay matrix. The numerical simulations illustrate that the proposed alternating optimisation algorithm achieves higher secrecy rates than those in a system without an instantaneous relay.
Starting Page	1285
Ending Page	1295
Page Count	11
ISSN	17518628
Volume Number	8
e-ISSN	17518636
Issue Number	Issue 8, May (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/8/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2013.0617
Journal	IET Communications
Publisher Date	2014-03-31
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Channel State Information Channel Uncertainty Concave Programming Equivalent Channel Matrix Fixed Signal Leakage Constraint Instantaneous Nonregenerative Relaying Network Leakage-to-noise Ratio Region Linear Algebra Matrix Algebra Multiuser Wireless Network Nonconvex Optimisation Problem Numerical Analysis Numerical Simulation Optimisation Technique Physical Layer Security Radio Link And Equipment Radio Network Relay Matrix Relay Network Secrecy Rate Region Signal Leakage Neutralisation Signal Processing Signal Processing And Detection Telecommunication Telecommunication Security Worst case Secrecy Rate Performance
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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