Lai, LianglingHu, JinsongChen, YoujiaZheng, HaifengYang, Nan2025-06-292025-06-299781728188232ORCID:/0000-0002-9373-5289/work/162054160http://www.scopus.com/inward/record.url?scp=85096512935&partnerID=8YFLogxKhttps://hdl.handle.net/1885/733765415We propose a new secure transmission scheme which uses directional modulation (DM) with artificial noise and is aided by the intelligent reflecting surface (IRS). Specifically, the direct path and IRS-enabled reflect path carry the same confidential signal and thus can be coherently added at the desired position to maximize the total received power, while the received signals at other positions are distorted. We derive a closed-form expression for the secrecy rate achieved by the proposed scheme. Using simulation results, we show that the proposed scheme can achieve two-dimensional secure transmission at a specific position. Also, its performance advantage over the conventional DM scheme becomes more pronounced as the number of reflecting elements at the IRS increases.ACKNOWLEDGMENTS This work was supported in part by the Educational Research Program for Young and Middle-aged Teachers Program of Fujian Province under Grant JAT190015, and in part by the National Natural Science Foundation of China under Grant 61671152.4enPublisher Copyright: © 2020 IEEE.Artificial noiseDirectional modulationIntelligent reflecting surfacePhysical layer security202010.1109/ICICSP50920.2020.923209285096512935