Design of a Single-User RIS-Aided MISO System Based on Statistical Channel Knowledge
- Resource Type
- Conference
- Authors
- Syed, Sadaf; Semmler, Dominik; Amor, Donia Ben; Joham, Michael; Utschick, Wolfgang
- Source
- 2023 57th Asilomar Conference on Signals, Systems, and Computers Signals, Systems, and Computers, 2023 57th Asilomar Conference on. :460-464 Oct, 2023
- Subject
- Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Computing and Processing
Signal Processing and Analysis
Training
Costs
Simulation
Channel estimation
Estimation
Coherence
Reconfigurable intelligent surfaces
MISO
Downlink
RIS
CSI
statistical knowledge
bilinear precoders
- Language
- ISSN
- 2576-2303
Reconfigurable intelligent surface (RIS) is considered a prospective technology for beyond fifth-generation (5G) networks to improve the spectral and energy efficiency at a low cost. Prior works on the RIS mainly rely on perfect channel state information (CSI), which imposes a huge computational complexity. This work considers a single-user RIS-assisted communication system, where the second-order statistical knowledge of the channels is exploited to reduce the training overhead. We present algorithms that do not require estimation of the CSI and reconfiguration of the RIS in every channel coherence interval, which constitutes one of the most critical practical issues in an RIS-aided system.