Robust beamforming based on graph attention networks for IRS-assisted satellite IoT communications

H Cao, W Zhu, W Feng, J Fan - Entropy, 2022 - mdpi.com
Satellite communication is expected to play a vital role in realizing Internet of Remote Things
(IoRT) applications. This article considers an intelligent reflecting surface (IRS)-assisted …

Optimization design in RIS-assisted integrated satellite-UAV-served 6G IoT: A deep reinforcement learning approach

M Wu, K Guo, X Li, A Nauman, K An… - IEEE Internet of Things …, 2024 - ieeexplore.ieee.org
Satellite networks have been emerged as a critical part of the next-generation wireless
networks. However, the high transmission latency, highly dynamic channel conditions and …

Weighted sum-rate maximization for multi-IRS aided integrated terrestrial-satellite networks

H Dong, C Hua, L Liu, W Xu… - 2021 IEEE Global …, 2021 - ieeexplore.ieee.org
This paper investigates a multiple intelligent reflecting surfaces (IRSs) aided integrated
terrestrial-satellite network (ITSN), where the IRSs are deployed to cooperatively assist the …

Joint beamforming design for RIS-assisted integrated satellite-HAP-terrestrial networks using deep reinforcement learning

M Wu, S Zhu, C Li, Y Chen, F Zhou - Sensors, 2023 - mdpi.com
In this paper, we consider reconfigurable intelligent surface (RIS)-assisted integrated
satellite high-altitude platform terrestrial networks (IS-HAP-TNs) that can improve network …

Towards integrated terrestrial-satellite network via intelligent reflecting surface

H Dong, C Hua, L Liu, W Xu - ICC 2021-IEEE International …, 2021 - ieeexplore.ieee.org
This paper investigates an intelligent reflecting surface (IRS)-aided integrated terrestrial-
satellite network (ITSN) system for the low channel gain users, where an IRS is deployed to …

Intelligent reflecting surface-aided integrated terrestrial-satellite networks

H Dong, C Hua, L Liu, W Xu… - IEEE Transactions on …, 2022 - ieeexplore.ieee.org
Intelligent reflecting surface (IRS) is a novel technology to manipulate wireless propagation
channels via smart and controllable signal reflection. In this paper, we investigate an IRS …

Robust multiuser beamforming for IRS-enhanced near-space downlink communications coexisting with satellite system

S Xu, J Liu, TK Rodrigues, N Kato - IEEE Internet of Things …, 2021 - ieeexplore.ieee.org
To the best of our knowledge, this article represents the first attempt toward robust
beamforming design for multiuser downlink communications in intelligent reflecting surface …

Deep reinforcement learning-based energy efficiency optimization for RIS-aided integrated satellite-aerial-terrestrial relay networks

M Wu, K Guo, X Li, Z Lin, Y Wu… - IEEE Transactions on …, 2024 - ieeexplore.ieee.org
Integrated satellite-aerial-terrestrial relay networks (ISATRNs) have been considered as a
promising architecture for next-generation networks, where high altitude platform (HAP) is …

Graph attention networks for channel estimation in RIS-assisted satellite IoT communications

K Tekbıyık, GK Kurt, AR Ekti… - arXiv preprint arXiv …, 2021 - arxiv.org
Direct-to-satellite (DtS) communication has gained importance recently to support globally
connected Internet of things (IoT) networks. However, relatively long distances of densely …

Robust downlink transmission design in IRS-assisted cognitive satellite and terrestrial networks

B Zhao, M Lin, M Cheng, JB Wang… - IEEE Journal on …, 2023 - ieeexplore.ieee.org
Cognitive satellite and terrestrial network (CSTN) is considered as a promising technology to
provide ubiquitous connectivity for various users within wide-coverage. This paper proposes …