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- W4313690059 abstract "Reconfigurable intelligent surfaces (RIS) can be utilized for enhancing the communication quality, and are regarded as a promising six-generation (6G) technique. Especially, the RIS generally is deployed as a reflector or an intelligent transmission terminal. Most of the existing works have focused on the reflective RIS. In contrast, the recently emerged user-specific RIS (US-RIS) can improve performance for users at a low cost. Unlike reflective RIS, US-RIS can control the phase of the user uplink signal when the signal penetrates US-RIS. The purpose of this paper is to investigate the energy efficient of multi-layer US-RIS-aided uplink communication system with quality of service to find the optimal layer of US-RIS. To this end, we formula a joint optimization problem over several transmit beamforming vectors. An optimal energy efficient design which is based on alternating update and successive convex approximation (SCA) is proposed. Simulation results reveal that the number of elements has an impact on energy efficiency, which affects the optimal layer." @default.
- W4313690059 created "2023-01-08" @default.
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- W4313690059 date "2022-01-01" @default.
- W4313690059 modified "2023-10-07" @default.
- W4313690059 title "The Optimal Layer of User-Specific Reconfigurable Intelligent Surfaces Structure for Uplink Communication System" @default.
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- W4313690059 doi "https://doi.org/10.1007/978-3-031-23141-4_4" @default.
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