NDLI: Achievable secrecy rate of wiretap channels incorporating multi-input–multi-output amplify and forward relaying

Content Provider	IET Digital Library
Author	Mirzaee, Meysam Akhlaghi, Soroush
Abstract	This study discusses the secrecy rate of two-hop relay-assisted cooperative wiretap channels, incorporating multi-antenna amplify and forward relaying in the middle of transmission. In this regard, under the Gaussian code book assumption, three main scenarios including null-space beamforming (NSBF), rank-1 beamforming (RBF), and the so-called general rank beamforming (GRBF) are proposed to be employed at the relay where their achievable secrecy rates are studied. Accordingly, for NSBF, a closed-form solution is derived, whereas the corresponding optimisation problems are formulated for the remaining cases as a standard semi-definite programming problem. Though GRBF ranks the first in terms of the achievable secrecy rate, RBF exhibits favourable results with a much lower complexity, as the corresponding optimisation problem runs over a reduced dimension. Moreover, NSBF has a much lower complexity, as it provides an analytical solution at the expense of a decrease in the secrecy rate, and interestingly, it performs quite well when the number of eavesdroppers is less than that of the relay antennas.
Starting Page	300
Ending Page	308
Page Count	9
ISSN	17518628
Volume Number	10
e-ISSN	17518636
Issue Number	Issue 3, Feb (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/10/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2015.0208
Journal	IET Communications
Publisher Date	2016-02-11
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Amplify And Forward Communication Antenna Array Array Signal Processing Code Cooperative Communication Cooperative Wiretap Channel Gaussian Code Book Assumption Gaussian Processes General Rank Beamforming GRBF Mathematical Programming MIMO Communication Multiantenna Amplify And Forward Relaying Multiinput–multioutput Amplify And Forward Relaying NSBF Null-Space Beamforming Optimisation Technique Radio Link And Equipment Rank-1 Beamforming Relay Antenna Relay Network Semidefinite Programming Problem Signal Processing And Detection Statistics Telecommunication Telecommunication Security Two-hop Relay
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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