RIS-assisted multi-user beam tracking system and hardware experiment
Reconfigurable intelligent surface(RIS)effectively improves the performance of 6G communication sys-tems by intelligently controlling the electromagnetic propagation path.However,the integration of a large number of reflecting elements in RIS increases the complexity of multi-beam control and enlarges the codebook search space,leading to insufficient real-time control capabilities and difficulties in multi-user beam tracking.To enhance the appli-cability of RIS in multi-user mobile scenarios,an innovative inverse diffraction-based field source iterative model was proposed to rapidly generate near-and far-field multi-user control codebooks.A RIS-assisted single base station posi-tioning scheme was designed to sense the movement of users and switch beams in real-time.A prototype of a RIS-assisted multi-user beam tracking system was developed,enabling fast beam alignment during multi-user mobility.Experimental results show that millisecond-level beam switching can achieve real-time information transmission for mobile multi-users.
万方数据
维普
