Work

Iterative Optimization of Reconfigurable Intelligent Surface Aided Single-Carrier Spatial Modulation

Year: 2025

Type: conference-paper

Abstract: This paper proposes a novel cyclic-prefixed single-carrier transmission scheme that amalgamate a reconfigurable intelligent surface (RIS) with spatial modulation in the frequency-selective fading channel. The discrete-input continuous-output memoryless channel's~(DCMC) capacities of the proposed schemes are formulated, while their gradients with respect to the RIS phase shifts are derived in the closed form. Then, the gradients are used for iteratively and efficiently optimizing the proposed RIS-aided schemes with the aid of the gradient-ascent algorithm. Our performance results demonstrate that the proposed iterative algorithm enhances the DCMC capacity of the schemes, while outperforming the conventional RIS benchmarks. Moreover, the convergence behavior and sensitivity in the proposed iterative algorithm are analyzed.

Source: IEEE Globecom Workshops (GC Wkshps)

DOI: 10.1109/gcwkshps68340.2025.11591036

Authors: Kentaro Nagaya, Shinya Sugiura

Institution: The University of Tokyo

Topic: Advanced Wireless Communication Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: green

Funders: Japan Society for the Promotion of Science, Japan Science and Technology Agency

Awards: Advanced Signal Processing for High-Speed and High-Reliability Communications in Highly Doubly Selective Underwater Acoustic Channel, 次世代ワイヤレス通信のための高周波数帯伝搬路環境の知的統合制御フレームワーク構築, Generalized statistical channel model and theoretical analysis framework for terahertz communications, 時空間超高精細同期型ワイヤレスネットワークに関する研究