Journal
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
Volume 69, Issue 12, Pages 15137-15148Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TVT.2020.3035544
Keywords
Wireless communication; Signal to noise ratio; 5G mobile communication; Communication system security; Physical layer security; Rayleigh channels; N-wave with diffuse power fading model; generalized fading channels; mm-wave; physical layer security
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Funding
- Escuela Politecnica Nacional [PIGR-19-06]
- Academy of Finland 6Genesis Flagship [318927]
- FAITH project [334280]
- Spanish Government
- European Fund for Regional Development FEDER [TEC2017-87913-R]
- Junta de Andalucia [P18-RT-3175: TETRA5G]
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We investigate the realistic propagation conditions effects on wireless physical layer security, which are different from classical Rice and Rayleigh fading. Specifically, we study how the superposition of a number of dominant specular waves and diffusely propagating components impacts the achievable secrecy performance. We derive analytical expressions for the secrecy outage probability and the average secrecy capacity, which have similar complexity to other alternatives in the literature derived for simpler fading models. We provide very useful insights on the impact on physical layer security of (i) the number; (ii) the relative amplitudes and (iii) the overall power of the dominant specular components. We show that it is possible to obtain remarkable improvements on the system secrecy performance when: (a) the relative amplitudes of the dominant specular components for the legitimate channel are more unbalanced compared to those of the eavesdropper's channel, and (b) the power of the dominant components for the main channel is significantly larger than the power of the dominant components for the wiretap channel.
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