通信与信息技术Issue(6)：147-152,6.
近场通信下MIMO-NOMA系统物理层安全研究
Physical layer security for MIMO-NOMA in near-field communication
刘学育1
作者信息
- 1. 四川中移通信技术工程有限公司,四川 成都 610000
- 折叠
摘要
Abstract
This paper proposes a secure transmission architecture for near-field communication based on non-orthogonal multiple access(NOMA),which establishes a physical-layer security framework through joint optimization of transceiver beamforming designs to suppress near-field eavesdropping.To address the impact of near-field channel characteristics on secrecy performance,we formulate a secrecy rate maximization model and develop a two-stage alternating optimization algorithm.The first stage transforms the non-convex problem into a semidefinite programming(SDP)formulation via semidefinite relaxation(SDR),while the second stage iteratively approxi-mates remaining non-convex constraints through successive convex approximation(SCA)to attain locally optimal solutions.Numerical simulations demonstrate that compared with conventional far-field orthogonal multiple access(OMA)and NOMA schemes,the proposed architecture exhibits significant advantages in key metrics such as secrecy rate.The study not only reveals the enhancement mechanism of near-field beam spatial characteristics for physical-layer security but also provides novel insights for addressing communication securi-ty challenges in 6G near-field scenarios.This work combines theoretical innovation with engineering applicability,offering valuable guid-ance for developing next-generation secure wireless systems.关键词
近场通信/非正交多址/波束成形/物理层安全Key words
Near-field communication/Non-orthogonal multiple access/Beamforming/Physical layer security分类
信息技术与安全科学引用本文复制引用
刘学育..近场通信下MIMO-NOMA系统物理层安全研究[J].通信与信息技术,2025,(6):147-152,6.
