基于阵列滑窗和波束路由的智能反射面辅助太赫兹通信OA北大核心CSTPCD

Considering the system sum rate decrease resulting from inter-user interference in the intelligent reflective surface(IRS)-assisted multi-user terahertz(THz)communications,a scheme combining sliding window and IRS is pro-posed to assist THz communications.Firstly,an array sliding window with an equal number of active users is constructed and connected to each active user in a one-to-one manner.Secondly,the mathematical expressions of the channel and rate provided by the sliding window to its corresponding associated active user are defined based on routing theory to derive the optimal active-passive beamforming and reformulate the beamforming problem into an equivalent graph optimization prob-lem.Finally,given the constraints of the minimum user rate and total base station transmission power,alternating optimiza-tion algorithm is introduced to optimize sliding window parameters and maximize the system sum rate.Simulation results show that in the same channel scenarios,the system sum rate of our proposed scheme is increased by 5 bps/Hz compared to the conventional single IRS-assisted multi-user communications.