IRS辅助太赫兹通信系统的混合预编码设计OA

In order to solve the beam splitting problem in 6G Terahertz communications,this paper proposes a two-layer phase-shift hybrid precoding algorithm and deeply analyzes the beam splitting problem in an intelligent reflecting Ssurface(IRS)-as-sisted mixed-field environment.Considering the coexistence and coupling of near-field and far-field effects in the mixed field,we move beyond the traditional single-layer phase shifter and true-time-delay(TTD)methods.Instead,a two-layer phase shifter and TTD architecture is employed to compensate for beam splitting in the near-field and far-field,respectively.Experi-mental results show that the proposed algorithm can significantly reduce the influence of beam splitting in mixed scenarios,achieving a channel gain of at least 87.3%,which improves the system throughput.