An overview of signal processing techniques for RIS/IRS-aided wireless systems

C Pan, G Zhou, K Zhi, S Hong, T Wu… - IEEE Journal of …, 2022 - ieeexplore.ieee.org
In the past as well as present wireless communication systems, the wireless propagation
environment is regarded as an uncontrollable black box that impairs the received signal …

RIS-assisted physical layer security in emerging RF and optical wireless communication systems: A comprehensive survey

MH Khoshafa, O Maraqa, JM Moualeu… - … Surveys & Tutorials, 2024 - ieeexplore.ieee.org
Security and latency are crucial aspects in the design of future wireless networks. Physical
layer security (PLS) has received a growing interest from the research community in recent …

Active RIS versus passive RIS: Which is superior with the same power budget?

K Zhi, C Pan, H Ren, KK Chai… - IEEE Communications …, 2022 - ieeexplore.ieee.org
This letter theoretically compares the active reconfigurable intelligent surface (RIS)-aided
system with the passive RIS-aided system. For a fair comparison, we consider that these two …

Covert communication assisted by UAV-IRS

C Wang, X Chen, J An, Z **ong, C **ng… - IEEE Transactions …, 2022 - ieeexplore.ieee.org
With the benefits of unmanned aerial vehicle (UAV) and intelligent reflecting surface (IRS),
they can be combined to further enhance the communication performance. However, the …

Active reconfigurable intelligent surface aided secure transmission

L Dong, HM Wang, J Bai - IEEE Transactions on Vehicular …, 2021 - ieeexplore.ieee.org
Reconfigurable Intelligent Surface (RIS) draws great attentions in academic and industry
due to its passive and low power consumption nature, and has currently been used in …

Active reconfigurable intelligent surface-assisted MISO integrated sensing and communication systems for secure operation

AA Salem, MH Ismail, AS Ibrahim - IEEE Transactions on …, 2022 - ieeexplore.ieee.org
Spectrum congestion has motivated the recent introduction of integrated sensing and
communication (ISAC) systems where radar and communications functionalities co-exist …

Active IRS aided multiple access for energy-constrained IoT systems

G Chen, Q Wu, C He, W Chen… - IEEE Transactions on …, 2022 - ieeexplore.ieee.org
In this paper, we investigate the fundamental multiple access (MA) scheme in an active
intelligent reflecting surface (IRS) aided energy-constrained Internet-of-Things (IoT) system …

Pervasive machine learning for smart radio environments enabled by reconfigurable intelligent surfaces

GC Alexandropoulos, K Stylianopoulos… - Proceedings of the …, 2022 - ieeexplore.ieee.org
The emerging technology of reconfigurable intelligent surfaces (RISs) is provisioned as an
enabler of smart wireless environments, offering a highly scalable, low-cost, hardware …

Robust beamformer design in active RIS-assisted multiuser MIMO cognitive radio networks

R Allu, O Taghizadeh, SK Singh… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
In this work, we address the problem of a joint robust transmission, reflection and reception
strategy design at an active reconfigurable intelligent surface (RIS)-assisted underlay …

Meta reinforcement learning for resource allocation in aerial active-RIS-assisted networks with rate-splitting multiple access

S Faramarzi, S Javadi, F Zeinali, H Zarini… - IEEE Internet of …, 2024 - ieeexplore.ieee.org
Mounting a reconfigurable intelligent surface (RIS) on an unmanned aerial vehicle (UAV)
holds promise for improving traditional terrestrial network performance. Unlike conventional …