Physical layer security in wireless HetNets avionics and satellite communication systems

2021 ◽  
pp. 181-218
Author(s):  
Rameez Asif ◽  
Muhammad Ali ◽  
Yim-Fun Hu ◽  
George Oguntala
Keyword(s):  
Physical Layer Security ◽  
Communication Systems ◽  
Satellite Communication ◽  
Physical Layer

scholarly journals Physical Layer Security for Multiuser Satellite Communication Systems With Threshold-Based Scheduling Scheme

2020 ◽  
Vol 69 (5) ◽  
pp. 5129-5141 ◽  
Author(s):  
Kefeng Guo ◽  
Kang An ◽  
Bangning Zhang ◽  
Yuzhen Huang ◽  
Xiaogang Tang ◽  
...  
Keyword(s):  
Physical Layer Security ◽  
Communication Systems ◽  
Satellite Communication ◽  
Physical Layer ◽  
Scheduling Scheme

scholarly journals Physical-Layer Security Improvement with Reconfigurable Intelligent Surfaces for 6G Wireless Communication Systems

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1439
Author(s):  
Janghyuk Youn ◽  
Woong Son ◽  
Bang Chul Jung
Keyword(s):  
Wireless Communication ◽  
Physical Layer Security ◽  
Communication Systems ◽  
Low Cost ◽  
Physical Layer ◽  
Base Station ◽  
Wireless Communication Systems ◽  
Secrecy Rate ◽  
Pilot Signal ◽  
Time Division

Recently, reconfigurable intelligent surfaces (RISs) have received much interest from both academia and industry due to their flexibility and cost-effectiveness in adjusting the phase and amplitude of wireless signals with low-cost passive reflecting elements. In particular, many RIS-aided techniques have been proposed to improve both data rate and energy efficiency for 6G wireless communication systems. In this paper, we propose a novel RIS-based channel randomization (RCR) technique for improving physical-layer security (PLS) for a time-division duplex (TDD) downlink cellular wire-tap network which consists of a single base station (BS) with multiple antennas, multiple legitimate pieces of user equipment (UE), multiple eavesdroppers (EVEs), and multiple RISs. We assume that only a line-of-sight (LOS) channel exists among the BS, the RISs, and the UE due to propagation characteristics of tera-hertz (THz) spectrum bands that may be used in 6G wireless communication systems. In the proposed technique, each RIS first pseudo-randomly generates multiple reflection matrices and utilizes them for both pilot signal duration (PSD) in uplink and data transmission duration (DTD) in downlink. Then, the BS estimates wireless channels of UE with reflection matrices of all RISs and selects the UE that has the best secrecy rate for each reflection matrix generated. It is shown herein that the proposed technique outperforms the conventional techniques in terms of achievable secrecy rates.

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