Author Identifier (ORCID)
Shihao Yan: https://orcid.org/0000-0002-4586-1926
Abstract
In this work, we consider a covert communication scenario with multiple friendly interference nodes. The goal is to hide a legitimate communication link from a transmitter to a receiver under a warden’s surveillance. Firstly, we propose a novel strategy for generating artificial noise (AN) signals and formulate a corresponding design problem, aiming to minimize the adverse effects of AN on the legitimate receiver while enhancing communication covertness. Specifically, we optimize the basis matrix for AN signal space using statistical information of the involved channel coefficients, when precise channel state information are unavailable. Secondly, we analyze the geometric structure of the AN basis matrix constraint and transform the nonconvex problem into an unconstrained problem on the complex Stiefel manifold. Additionally, we develop a specialized Riemannian Stochastic Variance Reduced Gradient (R-SVRG) algorithm to tackle the problem. In the algorithm, the problem is solved with lower computational complexity compared to full gradient algorithm. Thirdly, we prove that the customized R-SVRG algorithm is theoretically guaranteed to be converge and that the solution is a stationary point of the optimization problem. In the end, simulation results demonstrate the superiority of the proposed AN signal generation strategy over traditional AN in terms of achieving higher covert communication rate.
Document Type
Journal Article
Date of Publication
1-1-2026
Volume
25
Publication Title
IEEE Transactions on Wireless Communications
Publisher
IEEE
School
School of Science
Funders
National Science Foundation of China (62271371, 62201425) / Shannxi Key Industrial Innovation Chain Project in Industrial Domain (2020ZDLGY15-01) / Qinchuangyuan Total Window “Four Chain” Integration Project (2024PT-ZCK-11) / Chongqing Natural Science Foundation Innovation and Development Joint Fund (China Satellite Network Group Company Ltd (CSTB2024NSCQ-LZX0162)
Creative Commons License
This work is licensed under a Creative Commons Attribution-No Derivative Works 4.0 License.
First Page
7809
Last Page
7824
Comments
This is an Author's Accepted Manuscript of an article published by IEEE. © 2025 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Zhao, X., Guo, W., Wang, Y., & Yan, S. (2025). Design of artificial interference signal waveforms for covert communication aided by multiple friendly nodes. IEEE Transactions on Wireless Communications, 25, 7809–7824. https://doi.org/10.1109/TWC.2025.3633621