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- Title
Physical Layer Security of the MIMO-NOMA Systems under Near-Field Scenario.
- Authors
Liu, Xueyu; Zhang, Lei; Xie, Wenwu; Cao, Yang; Fan, Chaojie
- Abstract
In this paper, we propose a secure transmission framework for near-field MIMO-NOMA systems. This architecture integrates beamforming mechanisms for both transmission and reception, allowing the base station to send encrypted information to authorized users, effectively countering eavesdropping attempts in a near-field environment. To optimize the secrecy communication capability in the near field, a two-phase alternating optimization algorithm is introduced. In the first phase, the semidefinite relaxation (SDR) method is used to relax constraints in the problem and convert it into a semidefinite programming (SDP) problem. In the second phase, the successive convex approximation (SCA) algorithm is employed to transform the original non-convex problem into a convex optimization problem, obtaining a locally optimal solution through multiple iterations. Simulation results validate that the proposed near-field communication strategy exhibits superior secrecy communication capabilities under various parameter settings compared to far-field communication strategies.
- Subjects
PHYSICAL layer security; OPTIMIZATION algorithms; SECURITY systems; NEAR field communication; SEMIDEFINITE programming; ALGEBRAIC field theory
- Publication
Electronics (2079-9292), 2024, Vol 13, Issue 4, p670
- ISSN
2079-9292
- Publication type
Article
- DOI
10.3390/electronics13040670