Beam Splitting Technique for Reconfigurable Intelligent Surface-Aided Simultaneous Wireless Information and Power Transfer Applications.

Recently, reconfigurable intelligent surface (RIS) has drawn massive attention among researchers and entrepreneurs as a potential technology for next-generation wireless technologies. This paper proposes a beam splitting method to simultaneously deliver power and information to different users (i.e., power user/information user). We use orthogonal training patterns generated by the Hadamard matrix to estimate the end-to-end channel information of each user. Then, a pattern addition (PA) method is applied to split the beam for each user. We implement a real-life testbed of the RIS-aided simultaneous wireless information and power transfer (SWIPT) system to verify the proposed algorithm. By experiment, we show that the proposed method can effectively distribute power and information to the corresponding users.