智能反射面辅助毫米波通信系统的性能优化探究  

Research on Performance Optimization of Intelligent Reflector-assisted Millimeter-wave Communication System

作　　者：姜文超 李春树 JIANG Wenchao;LI Chunshu(School of Physics and Electronic-Electrical Engineering,Ningxia University,Yinchuan 750021,China)

机构地区：[1]宁夏大学物理与电子电气工程学院,宁夏银川750021

出　　处：《宁夏工程技术》2022年第4期367-371,共5页Ningxia Engineering Technology

基　　金：宁夏自然科学基金资助项目(2020AAC03033)。

摘　　要：针对毫米波通信场景下智能反射面(IRS)能够改善通信链路性能这一技术,通过simRIS信道模型建立了一个多输入单输出(MISO)通信系统,以最大化用户信噪比(SNR)为目标,利用最大比率传输原理(MRT)和半正定松弛优化技术(SDR)对基站和IRS相移值进行了参数优化。仿真结果表明,在simRIS 28 GHz的3D模型应用场景中,基站发射功率保持不变时,通过增加IRS反射单元数量,能够提升用户端的接收SNR。Based on the improvement of the application of the intelligent reflect surface(IRS) on the specific performance of communication link in the millimeter wave communication scenario, a multiple-input single-output(MISO) communication system is established through the simRIS channel model to maximize user signal-to-noise ratio(SNR). The maximum ratio transfer principle(MRT) and SDR optimization technology are used to optimize the parameters of the base station and IRS phase shift values. The simulation results show that in the 3D model application scenario of simRIS at 28 GHz frequency, when the transmit power of base station remains unchanged, the received SNR of user can be improved by increasing the number of IRS reflection units.

关 键 词：智能反射面 波束赋形 毫米波通信 

分 类 号：TN929.5[电子电信—通信与信息系统]