近场场景下RIS辅助ISAC系统的安全通信

doi:10.12305/j.issn.1001-506X.2026.08.33

系统工程与电子技术 ›› 2026, Vol. 48 ›› Issue (8): 2879-2887.doi: 10.12305/j.issn.1001-506X.2026.08.33

• 通信与网络 • 上一篇

近场场景下RIS辅助ISAC系统的安全通信

张朝路¹^,²(), 傅友华¹^,²

1. 南京邮电大学电子与光学工程学院、柔性电子（未来技术）学院，江苏南京 210023
2. 南京邮电大学射频集成与微组装技术国家地方联合工程实验室，江苏南京 210023

收稿日期:2025-06-12 修回日期:2025-08-10 出版日期:2025-11-04 发布日期:2025-11-04
通讯作者: 傅友华 E-mail:1023020602@njupt.edu.cn
作者简介:张朝路（2000—），男，硕士研究生，主要研究方向为通信感知一体化、近场安全通信、智能反射表面
基金资助:
国家自然科学基金（62371249）资助课题

Secure communication in RIS-aided ISAC systems under near-field scenarios

Chaolu ZHANG¹^,²(), Youhua FU¹^,²

1. School of Electronic and Optical Engineering，School of Flexible Electronics （Future Technology），Nanjing University of Posts and Telecommunications，Nanjing 210023，China
2. National and Local Joint Engineering Laboratory of RF Integration and Micro-Assembly Technology，Nanjing University of Posts and Telecommunications，Nanjing 210023，China

Received:2025-06-12 Revised:2025-08-10 Online:2025-11-04 Published:2025-11-04
Contact: Youhua FU E-mail:1023020602@njupt.edu.cn

摘要/Abstract

摘要：

针对近场下通信感知一体化系统的安全问题，提出可重构智能反射面（reconfigurable intelligent surface，RIS）辅助的安全方案。通过联合优化基站的发射波束赋形向量和RIS反射系数，对保证感知要求下以最大化保密速率的非凸优化问题，采用加权最小均方误差算法对原问题目标函数进行转化使其变为更易处理的形式，进一步实现变量解耦并交替优化，即使用拉格朗日对偶算法及基于黎曼共轭梯度的算法分别求解。仿真结果表明，由于考虑了同时携带角度信息和距离信息的近场信道建模，所提方案具有显著的性能增益和稳定的收敛性，在保障目标检测要求的同时有效提升了安全性能。

关键词: 通感一体化, 可重构智能反射面, 安全通信, 近场通信

Abstract:

For the secure issues of integrated sensing and communication system under near-field scenarios, a reconfigurable intelligent surface（RIS）-assisted security scheme is investigated. By jointly optimizing the transmit beamforming vector at the base station and the reflection coefficients of the RIS, a non-convex optimization problem is formulated to maximize the secrecy rate while meeting sensing requirements. The weighted minimum mean square error algorithm is employed to transform the original problem objective function into a more tractable form, thereby decoupling the variables and enabling alternating optimization, the Lagrangian dual algorithm and a Riemannian conjugate gradient based algorithm are employed for respective solutions. Simulation results demonstrate that the proposed scheme achieves significant performance gains and stable convergence by incorporating near-field channel modeling that simultaneously captures both angular and distance information, while effectively enhancing security performance without compromising target detection requirements.

Key words: integrated sensing and communication(ISAC), reconfigurable intelligent surface(RIS), secure communication, near-field communication

中图分类号:

TN 929.5

张朝路, 傅友华. 近场场景下RIS辅助ISAC系统的安全通信[J]. 系统工程与电子技术, 2026, 48(8): 2879-2887.

Chaolu ZHANG, Youhua FU. Secure communication in RIS-aided ISAC systems under near-field scenarios[J]. Systems Engineering and Electronics, 2026, 48(8): 2879-2887.

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算法	RIS反射元件数
算法	40	60	80	100
近场下所提算法	1.59	4.94	14.75	39.43
近场下SDR算法	13.77	77.78	298.29	870.87

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近场场景下RIS辅助ISAC系统的安全通信

Secure communication in RIS-aided ISAC systems under near-field scenarios

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