3 papers
cs.IT2024
RIS with Coupled Phase Shift and Amplitude: Capacity Maximization and Configuration Set Selection
Seyedkhashayar Hashemi, Masoud Ardakani, Hai Jiang
A reconfigurable intelligent surface (RIS) is a planar surface that can enhance the quality of communication by providing control over the communication environment. Reflection opt…
cs.IT2023
Optimal Configuration of Reconfigurable Intelligent Surfaces with Arbitrary Discrete Phase Shifts
Seyedkhashayar Hashemi, Hai Jiang, Masoud Ardakani
We address the reflection optimization problem for a reconfigurable intelligent surface (RIS), where the RIS elements feature a set of non-uniformly spaced discrete phase shifts. T…
cs.IT2023
Performance of A Reconfigurable Intelligent Surface Controlled by An Illegitimate User
Xinwu Chen, Shuai Han, Hai Jiang
In this paper, we investigate how an illegitimate user can use a reconfigurable intelligent surface (RIS) to maximally degrade the secrecy performance of the legitimate system. We…