ETRI Journal

  • 제45권2호
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  • Pages.213-225
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  • 2023
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  • 1225-6463(pISSN)
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  • 2233-7326(eISSN)
한국전자통신연구원 (Electronics and Telecommunications Research Institute)
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Orthogonal variable spreading factor encoded unmanned aerial vehicle-assisted nonorthogonal multiple access system with hybrid physical layer security

  • Omor Faruk (Department of Electrical and Electronic Engineering, University of Rajshahi) ;
  • Joarder Jafor Sadiqu (Department of Electrical and Electronic Engineering, Begum Rokeya University) ;
  • Kanapathippillai Cumanan (Department of Electronic Engineering, University of York) ;
  • Shaikh Enayet Ullah (Department of Electrical and Electronic Engineering, University of Rajshahi)
  • 투고 : 2021.11.10
  • 심사 : 2022.11.14
  • 발행 : 2023.04.20
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초록

Physical layer security (PLS) can improve the security of both terrestrial and nonterrestrial wireless communication networks. This study proposes a simplified framework for nonterrestrial cyclic prefixed orthogonal variable spreading factor (OVSF)-encoded multiple-input and multiple-output nonorthogonal multiple access (NOMA) systems to ensure complete network security. Various useful methods are implemented, where both improved sine map and multiple parameter-weighted-type fractional Fourier transform encryption schemes are combined to investigate the effects of hybrid PLS. In addition, OVSF coding with power domain NOMA for multi-user interference reduction and peak-toaverage power ratio (PAPR) reduction is introduced. The performance of $\frac{1}{2}$-rated convolutional, turbo, and repeat and accumulate channel coding with regularized zero-forcing signal detection for forward error correction and improved bit error rate (BER) are also investigated. Simulation results ratify the pertinence of the proposed system in terms of PLS and BER performance improvement with reasonable PAPR.

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참고문헌

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