NDLI: Enhanced physical layer security for cognitive radio systems through joint spectrum access and power allocation

Content Provider	IET Digital Library
Author	Karimi, Mohammad Sadough, Seyed Mohammad Sajad Torabi, Mohammad
Abstract	Physical layer (PHY) security is an important issue in wireless communication systems. In this study, the authors investigate the interactions between the PHY security performance and the spectrum access technique in a cooperative cognitive radio (CR) network. In the classical spectrum access, if the measured energy on a given subchannel is less than a threshold, the subband is dedicated for CR transmission. Here, they consider a probabilistic spectrum access (PSA), which assigns to each primary subchannel a probability which is determined according to the measured energy on that subchannel. In addition, both spectrum access and CR power allocation are performed simultaneously. They formulate the general outage probability and some important PHY security performance metrics, such as average secrecy rate, secrecy outage probability, and probability of positive secrecy rate in terms of the spectrum access and optimal power allocation functions. The authors' numerical analysis indicates that the PSA method achieves a superior PHY security and outage performance compared to the classical threshold-based spectrum sensing and power allocation method.
Starting Page	3135
Ending Page	3142
Page Count	8
ISSN	17518628
Volume Number	14
e-ISSN	17518636
Issue Number	Issue 18, Nov (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/14/18
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2019.1369
Journal	IET Communications
Publisher Date	2020-06-22
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Average Secrecy Rate Classical Spectrum Access Technique Classical Threshold-based Spectrum Sensing Cognitive Radio Cognitive Radio System Cooperative Communication CR Power Allocation Method CR Transmission Enhanced Physical Layer Security General Outage Probability Legislation, Frequency Allocation And Spectrum Pollution Numerical Analysis Numerical Method Optimal Power Allocation Function PHY Security Performance Metrics Positive Secrecy Rate Primary Subchannel Probabilistic Spectrum Access Probability PSA Radio Link And Equipment Radio Spectrum Management Secrecy Outage Probability Statistics Telecommunication Security Wireless Channel Wireless Communication System
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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