NDLI: Securing cognitive radio with a combined approach of beamforming and cooperative jamming

Content Provider	IET Digital Library
Author	Liu, Weigang Sarkar, Md. Zahurul Islam Ratnarajah, Tharmalingam Du, Huiqin
Abstract	The authors consider secret communication through a relay-assisted cognitive interference channel in which primary and secondary base stations (SBSs), respectively, communicate with the primary and secondary receivers (PU-Rx and SU-Rx) in the presence of multiple eavesdroppers. An SBS is allowed to transmit simultaneously with the primary base station (PBS). They propose three cooperative jamming (CJ) schemes based on the available channel state information at the base stations and the relay. The proposed CJ schemes are designed to create additional interference in the direction of eavesdroppers without creating any interference to the PU-Rx and the SU-Rx. A combined approach of beamforming and zero-forcing precoding is developed at the PBS, the SBS and the relay to cancel out jamming interference at the PU-Rx and the SU-Rx. The secrecy rate of SU-Rx is calculated with the constraint of maintaining interference temperature at the PU-Rx under a certain threshold. Compared with the direct transmission schemes that are available in the literature, the authors’ results show that the approach which combined beamforming and CJ significantly improves the secrecy rate of the cognitive interference channel.
Starting Page	1
Ending Page	9
Page Count	9
ISSN	17518628
Volume Number	11
e-ISSN	17518636
Issue Number	Issue 1, Jan (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/11/1
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2016.0114
Journal	IET Communications
Publisher Date	2017-01-05
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Array Signal Processing Channel State Information CJ Scheme Code Cognitive Radio Cognitive Radio Security Combined Beamforming Approach Cooperative Jamming Cooperative Jamming Scheme Electromagnetic Compatibility Interference Interference Suppression Interference Temperature Jamming Jamming Interference Cancellation Multiple Eavesdroppers Precoding Primary Base Stations Primary Receiver PU-Rx Radio Link And Equipment Relay Network Relay-assisted Cognitive Interference Channel SBSs Secondary Base Stations Secondary Receiver Signal Processing And Detection SU-Rx Secrecy Rate Telecommunication Zero-forcing Precoding
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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