Coupled Phase-Shift STAR-RISs: A General Optimization Framework

Wang Z, Mu X, Liu Y, Schober R (2022)

Publication Type: Journal article

Publication year: 2022

Journal

IEEE Wireless Communications Letters IEEE Communications Society

Pages Range: 1-1

DOI: 10.1109/LWC.2022.3219020

Abstract

A general optimization framework is proposed for simultaneously transmitting and reflecting reconfigurable intelligent surfaces (STAR-RISs) with coupled phase shifts, which converges to the Karush– Kuhn–Tucker (KKT) optimal solution under some mild conditions. More particularly, the amplitude and phase-shift coefficients of STAR-RISs are optimized alternately in closed form. To demonstrate the effectiveness of the proposed optimization framework, the throughput maximization problem is considered in a case study. It is rigorously proved that the KKT optimal solution is obtained. Numerical results confirm the effectiveness of the proposed optimization framework compared to baseline schemes.

Authors with CRIS profile

Robert Schober Lehrstuhl für Digitale Übertragung (IDC)

Involved external institutions

Queen Mary University of London GB United Kingdom (GB)

How to cite

APA:

Wang, Z., Mu, X., Liu, Y., & Schober, R. (2022). Coupled Phase-Shift STAR-RISs: A General Optimization Framework. IEEE Wireless Communications Letters, 1-1. https://doi.org/10.1109/LWC.2022.3219020

MLA:

Wang, Zhaolin, et al. "Coupled Phase-Shift STAR-RISs: A General Optimization Framework." IEEE Wireless Communications Letters (2022): 1-1.

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