Work

Design of RIS-Aided mMTC+ Networks for Rate Maximization Under the Finite Blocklength Regime With Imperfect Channel Knowledge

Year: 2025

Type: article

Abstract: Within the context of massive machine-type communications+, reconfigurable intelligent surfaces (RISs) represent a promising technology to boost system performance in scenarios with poor channel conditions. Considering single-antenna sensors transmitting short data packets to a multiple-antenna collector node, we introduce and design an RIS to maximize the weighted sum rate (WSR) of the system working in the finite blocklength regime. Due to the large number of reflecting elements and their passive nature, channel estimation errors may occur. In this letter, we then propose a robust RIS optimization to combat such a detrimental issue. Based on concave bounds and approximations, the nonconvex WSR problem for the RIS response is addressed via successive convex optimization (SCO). Numerical experiments validate the performance and complexity of the SCO solutions.

Source: IEEE Communications Letters

DOI: 10.1109/lcomm.2025.3600591

Authors: Sergi Liesegang, Antonio Pascual-Iserte, Olga Muñoz, Alessio Zappone

Institutions: Università degli studi di Cassino e del Lazio Meridionale, Universitat Politècnica de Catalunya

Language: English

Topic: Advanced Wireless Communication Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: green