Temperature-Aware Phase-Shift Design of LC-RIS for Secure Communication
Mohamadreza Delbari (Technische Universität Darmstadt)
Bowu Wang (Technische Universität Darmstadt)
Nairy Moghadas Gholian (Technische Universität Darmstadt)
Arash Asadi (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Vahid Jamali (Technische Universität Darmstadt)
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Abstract
Liquid crystal (LC) technology enables low-power and costeffective solutions for implementing the reconfigurable intelligent surface (RIS). However, the phase-shift response of LC-RISs is temperaturedependent, which, if unaddressed, can degrade the performance. This issue is particularly critical in applications such as secure communications, where variations in phase-shift response may lead to significant information leakage. In this paper, we consider secure communication through an LC-RIS and developed a temperature-aware algorithm adapting the RIS phase shifts to thermal conditions. Our simulation results demonstrate that the proposed algorithm significantly improves the secure data rate compared to scenarios where temperature variations are not accounted for.