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http://dx.doi.org/10.5573/ieie.2016.53.4.079

The Impact of Hardware Impairments and Imperfect Channel State Information on Physical Layer Security  

Shim, Kyusung (Information System, Graduate School of Smart City Science Management, Hongik University)
Do, Nhu Tri (Dept. of Electronic and Computer Engineering in Graduate School, Hongik University)
An, Beongku (Dept. of Computer & information Communication Engineering, Hongik University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.53, no.4, 2016 , pp. 79-86 More about this Journal
Abstract
Physical layer security is cryptography technique to protect information by using physical nature of signals. Currently, many works on physical layer security have been actively researching while those researching models still have some problems to be solved. Eavesdropper does not share its channel state information with legitimate users to hide its presence. And when node transmits signal, hardware impairments are occurred, whereas many current researches assume that node model is ideal node and does not consider hardware impairments. The main features and contributions of this paper to solve these problems are as follows. First, our proposed system model deploys torch node around legitimate user to obtain channel state information of eavesdropper and considers hardware impairments by using channel state information of torch node. Second, we derive closed-form expression of intercept probability for the proposed system model. The results of the performance evaluation through various simulations to find out the effects on proposed system model in physical layer security show that imperfect channel state information does not effect on intercept probability while imperfect node model effects on intercept probability, Ergodic secrecy capacity and secrecy capacity.
Keywords
Physical layer security; Hardware impairment; Imperfect channel state information; Torch node; Intercept probability;
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