Constant Reflection Attenuation Constraint for Incoming Signals on Metasurface in Positional Modulation Design

Liang, Bin; Shi, Jun; Zhang, Bo

doi:10.1109/access.2020.3028450

Cited by 1 publication

(1 citation statement)

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“…Furthermore, the authors of [40] investigated AN's effect in RIS‐aided secure systems, which drew the conclusion that AN is helpful under the scenario with local eavesdroppers and large signal‐to‐noise ratio (SNR). Additionally, in the field of DM, [41] and [42] first exploited the multi‐path effect for positional modulation with the aid of metasurface acting as a low‐cost flexible RIS. Specifically, the weight coefficients of transmit array and RIS for each QPSK symbol are jointly optimised through alternating optimisation (AO).…”

Section: Introductionmentioning

confidence: 99%

Artificial noise aided directional modulation via reconfigurable intelligent surface: Secrecy guarantee in range domain

et al. 2022

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Recently, the physical limitation of range-domain security guarantee for directional modulation with frequency diverse array was disclosed in Ding et al. (IEEE Access 8, 63302-63309 (2020)). Therefore, to recreate this significant secrecy realisation in both direction and range domain, the authors conceive an artificial noise aided directional modulation scheme via reconfigurable intelligent surface. Specifically, the angle of departure from the reconfigurable intelligent surface to co-direction receivers varies with distance, which provides the freedom to distinguish users in the range domain. With locations of the active eavesdroppers, an optimisation problem is further formulated to maximise the secrecy rate, which is then solved by applying genetic algorithm and alternating optimisation. On the other hand, when the eavesdroppers are silent, we employ maximum-ratio transmission precoding and artificial noise to guarantee information security. Finally, simulation results demonstrate that, due to the aid of reconfigurable intelligent surface, the developed directional modulation structure can robustly guarantee the information security in the range domain, whether the information of eavesdroppers is achieved.

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Section: Introductionmentioning

confidence: 99%