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arXiv · 2209.12105

Secrecy Rate Analysis of STAR-RIS in Presence of Energy Harvesting Eavesdroppers

Mohammad Reza Kavianinia·Mohammad Javad Emadi
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Abstract

This work peruses a simultaneous transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) based wireless system wherein untrusted energy harvesting nodes wiretap the legitimate signal. The achievable secrecy rate and the harvested energy for multicast communication are computed as functions of STAR-RIS transmission and reflection coefficients (TARCs). Thus, to maximize the secrecy rate while satisfying the minimum required harvested energies, the non-convex optimization problem is investigated. By using the Dinkelbach transformation and semi-definite relaxation technique, the optimization problem is transformed into a convex problem. Eventually, the numerical results are reported to specify the effects of the size of the STAR-RIS and optimizing its TARCs elements on magnifying the secrecy rate-energy harvesting region.

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Mohammad Reza Kavianinia, Mohammad Javad Emadi. 2022-09-24. Secrecy Rate Analysis of STAR-RIS in Presence of Energy Harvesting Eavesdroppers. https://arxiv.org/abs/2209.12105

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