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Impact Factor:3.109
DOI number:10.1109/LSP.2019.2905664
Affiliation of Author(s):School of ComputerScience and Information Engineering, Hefei University of Technology
Journal:IEEE Signal Processing Letters
Funded by:National Natural Science Foundation of China under Grant 61571178.
Key Words:Physical-layer security, cooperative relay, fast forward full-duplex technique, secrecy capacity
Abstract:"This letter makes a first attempt to design a cooperative relay scheme to secure wireless communications by adopting a fast-forward full-duplex (F3D) node. Different from the conventional full-duplex relay, the F3D node could process and forward the received signal immediately. With such forwarding, the forwarded signal of F3D could enhance the signal to interference plus noise ratio of the receiver, whereas weaken that of the eavesdropper and thus build up a secure channel. Beyond the proposed scheme, we move forward to optimize the signal processing design of the F3D node with the target of maximizing the secrecy capacity. The formulated optimization problem is nonconvex and challenging to deal with. We then design an iterative algorithm based on generalized fractional programming to solve it. One key step in the iterative algorithm involves another nonconvex optimization and we decompose it into a two-level optimization. Simulation results validate the effectiveness of our designed secure cooperative relay scheme and show that adopting F3D node for physical-layer security has good performance in terms of achievable secrecy capacity compared with the scheme without F3D node."
Co-author:Jun Gao,Zhongyi Guo
First Author:Xinyue Hu
Indexed by:Journal paper
Correspondence Author:Caihong Kai
Discipline:Engineering
Document Type:J
Volume:26
Issue:5
Page Number:775 - 779
ISSN No.:1558-2361
Translation or Not:no
Date of Publication:2019-03-27
Included Journals:SCI、EI