基于IRS相位设计的空时线编码系统性能优化方法  

Performance Optimization of Space-Time Line Code SystemBased on IRS Phase Shift Design

作　　者：章万静 ZHANG Wanjing(School of Computer and Communication,Jiangsu Vocational College of Electronics and Information,Huaian 223003,China)

机构地区：[1]江苏电子信息职业学院计算机与通信学院,江苏淮安223003

出　　处：《无线电通信技术》2024年第6期1209-1214,共6页Radio Communications Technology

基　　金：江苏省科技计划项目(BY2022364)。

摘　　要：为提升通信质量,针对智能反射面(Intelligent Reflecting Surface,IRS)辅助的空时线编码(Space-Time Line Code,STLC)系统,提出基于IRS相位设计的STLC系统误码率性能优化策略。建立关于IRS相位矢量的优化用户端信噪比目标问题,利用半定规划(Semidefinite Relaxation,SDR)法和单模约束松弛法(Unit-modulus Constraint Relaxation,UCR)求解,得到提升用户端信噪比的IRS相位的解,进而降低系统误码率。仿真结果表明,与没有采用IRS辅助的STLC系统相比,IRS辅助的STLC系统可显著降低误码率。In order to improve quality of communication,performance optimization scheme based on phase shift design of Intelligent Reflector Surface(IRS)is proposed for IRS assisted Space-Time Line Code(STLC)system.Firstly,signal noise ratio of user optimization problem with phase shift vector of IRS is established.Then,both Semidefinite Relaxation(SDR)method and Unit-modulus Constraint Relaxation(UCR)method are used to solve the problem.And the solution of IRS phase shift which improves the user’s SNR is obtained.Finally the system bit error rate is reduced.Simulation results show that compared with the STLC system without IRS,the IRS-assisted STLC can significantly reduce the bit error rate.

关 键 词：空时线编码 智能反射面 半定规划法 单模约束松弛法 信噪比 误码率 

分 类 号：TN929.5[电子电信—通信与信息系统]