公开(公告)号：US11218199B2

公开(公告)日：2022-01-04

申请号：US17084601

申请日：2020-10-29

Applicant: University of Electronic Science and Technology of China

Inventor： Zhi Chen ,  Xinying Ma ,  Wenjie Chen

IPC: H04B7/0456 ,  H04B7/06 ,  H04B7/145 ,  H04L29/06

Abstract: A design method for an intelligent reflecting surface (IRS) aided terahertz secure communication system is provided. The IRS aided terahertz multi-input single-output (MISO) system includes a base station (BS) equipped with NBS antennas, an IRS equipped with NIRS reflecting elements, a single-antenna user and a single-antenna eavesdropper. The BS transmits signals by the active hybrid beamforming to the relay of the IRS, and the IRS adjusts the signals and reflects the signals to the mobile user, which suppresses the received signal of the eavesdropper. The present invention maximizes the downlink secrecy rate by establishing a joint optimization function and maximizes the system data transmission rate by a cross-entropy based search method.