NDLI: Joint beamforming and power allocation for secure communication in cognitive radio networks

Content Provider	IET Digital Library
Author	Chen, Tao Yuan, Hua Qiang Zhao, Tie Zhu Zhang, Zu Sheng Ao, Xin
Abstract	In this study, secure communication in cognitive radio networks is investigated. A cooperative jammer is utilised to transmit artificial noise for interfering with the eavesdropper. The authors’ objective is to maximise the available secrecy rate of the secondary user (SU) under the interference power constraint at the primary user and the global transmit power constraint at the transmitters. In that case, beamforming vectors of the SU transmitter and the cooperative jammer, and power allocation between them need to be optimised. However, the optimisation problem is non-convex and hard to solve. In order to tackle it, two suboptimal algorithms are proposed: complete orthogonal projection and partial orthogonal projection. In these algorithms, the original optimisation problems are first decoupled into two sub-problems, which deal with the transmit beamforming vectors and power allocation, respectively. Then, the optimal solution is obtained by iteration alternately. Finally, simulation results verify the effectiveness of the proposed algorithms.
Starting Page	1156
Ending Page	1162
Page Count	7
ISSN	17518628
Volume Number	10
e-ISSN	17518636
Issue Number	Issue 10, Jul (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/10/10
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2014.1243
Journal	IET Communications
Publisher Date	2016-07-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Array Signal Processing Artificial Noise Available Secrecy Rate Beamforming Vector Cognitive Radio Cognitive Radio Network Complete Orthogonal Projection Concave Programming Cooperative Communication Cooperative Jammer Eavesdropper Electromagnetic Compatibility Global Transmit Power Constraint Interference Interference Power Constraint Iteration Joint Beamforming-power Allocation Scheme Nonconvex Optimisation Problem Optimisation Technique Partial Orthogonal Projection Primary User Radio Frequency Interference Radio Link And Equipment Secondary User Secure Communication Signal Processing And Detection SU Transmitter Suboptimal Algorithm Telecommunication Security Transmit Beamforming Vector
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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