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We propose a predictive neural network architecture that can be utilized to update reference velocity models as inputs to the full waveform inversion. Deep learning models are explored to augment velocity model building workflows during…

图像与视频处理 · 电气工程与系统科学 2019-10-08 Ping Lu , Yanyan Zhang , Jianxiong Chen , Yuan Xiao , George Zhao

In this paper, we tackle the problem of joint symbol level precoding (SLP) and reconfigurable intelligent surface (RIS) phase shift design with constellation rotation in the finite block length regime. We aim to increase energy efficiency…

Reconfigurable intelligent surfaces (RISs) are widely considered a promising technology for future wireless communication systems. As an important indicator of RIS-assisted communication systems in green wireless communications, energy…

信号处理 · 电气工程与系统科学 2023-10-25 Zhiyi Li , Jida Zhang , Jieao Zhu , Shi Jin , Linglong Dai

Reconfigurable intelligent surfaces (RISs) represent a radical new technology that can shape the radio wave propagation in wireless communication systems and offers a great variety of possible performance and implementation gains. Motivated…

信息论 · 计算机科学 2021-09-06 Nemanja Stefan Perović , Le-Nam Tran , Marco Di Renzo , Mark F. Flanagan

Reconfigurable intelligent surface (RIS) constitutes a disruptive technology for enhancing vehicular communication performance through reconfigurable propagation environments. In this paper, we propose an adaptive channel estimation…

系统与控制 · 电气工程与系统科学 2026-03-03 Tianyou Li , Haifeng Hu , Dapeng Li

This work studies the net sum-rate performance of a distributed reconfigurable intelligent surfaces (RISs)-assisted multi-user multiple-input-single-output (MISO) downlink communication system under imperfect instantaneous-channel state…

信息论 · 计算机科学 2023-07-04 Bayan Al-Nahhas , Qurrat-Ul-Ain Nadeem , Anas Chaaban

To improve the information exchange rate between Alice and Bob in traditional two-way directional modulation (TWDM) network, a new double-reconfigurable intelligent surface (RIS)-aided TWDM network is proposed. To achieve the low-complexity…

信息论 · 计算机科学 2022-01-25 Rongen Dong , Feng Shu , Ri-Qing Chen , Yongpeng Wu , Cunhua Pan , Jiangzhou Wang

With the aim of integrating over-the-air federated learning (AirFL) and non-orthogonal multiple access (NOMA) into an on-demand universal framework, this paper proposes a novel reconfigurable intelligent surface (RIS)-aided hybrid network…

信息论 · 计算机科学 2022-07-05 Wanli Ni , Yuanwei Liu , Zhaohui Yang , Hui Tian , Xuemin Shen

We consider a reconfigurable intelligent surface (RIS)-aided massive multi-user multiple-input multiple-output (MIMO) communication system with transceiver hardware impairments (HWIs) and RIS phase noise. Different from the existing…

信息论 · 计算机科学 2021-10-14 Jianxin Dai , Feng Zhu , Cunhua Pan , Hong Ren , Kezhi Wang

This paper studies the interference broadcast channel comprising multiple multi-antenna Base Stations (BSs), each controlling a beyond diagonal Reconfigurable Intelligent Surface (RIS) and serving multiple single-antenna users. Wideband…

信息论 · 计算机科学 2024-09-09 Konstantinos D. Katsanos , Paolo Di Lorenzo , George C. Alexandropoulos

This paper explores the potential of aerial reconfigurable intelligent surfaces (ARIS) to enhance coordinated multi-point non-orthogonal multiple access (CoMP-NOMA) networks. We consider a system model where a UAV-mounted RIS assists in…

信号处理 · 电气工程与系统科学 2024-11-05 Muhammad Umer , Muhammad Ahmed Mohsin , Aamir Mahmood , Kapal Dev , Haejoon Jung , Mikael Gidlund , Syed Ali Hassan

Reconfigurable intelligent surface (RIS) is an emerging paradigm able to control the propagation environment in wireless systems. Most of the research on RIS has been dedicated to system optimization and, with the advent of beyond diagonal…

信息论 · 计算机科学 2024-06-18 Matteo Nerini , Shanpu Shen , Hongyu Li , Marco Di Renzo , Bruno Clerckx

The optimization of multi-user multi-input multi-output (MU-MIMO) precoders is a widely recognized challenging problem. Existing work has demonstrated the potential of graph neural networks (GNNs) in learning precoding policies. However,…

信号处理 · 电气工程与系统科学 2025-03-11 Lin Zhang , Shengqian Han , Chenyang Yang

Active reconfigurable intelligent surface (RIS) has attracted significant attention as a recently proposed RIS architecture. Owing to its capability to amplify the incident signals, active RIS can mitigate the multiplicative fading effect…

In this paper, we consider a reconfigurable intelligent surface (RIS)-assisted two-way relay network, in which two users exchange information through the base station (BS) with the help of an RIS. By jointly designing the phase shifts at…

信息论 · 计算机科学 2021-05-11 Jun Wang , Ying-Chang Liang , Jingon Joung , Xiaojun Yuan , Xinguo Wang

Reconfigurable intelligent surface (RIS) is known as a promising technology to improve the performance of wireless communication networks, which has been extensively studied. Movable antenna (MA) is a novel technology that fully exploits…

信号处理 · 电气工程与系统科学 2023-11-14 Yunan Sun , Hao Xu , Chongjun Ouyang , Hongwen Yang

Reconfigurable Intelligent Surfaces (RISs) are recently gaining remarkable attention as a low-cost, hardware-efficient, and highly scalable technology capable of offering dynamic control of electro-magnetic wave propagation. Their…

信息论 · 计算机科学 2020-10-12 George C. Alexandropoulos , Sumudu Samarakoon , Mehdi Bennis , Merouane Debbah

Reconfigurable intelligent surfaces (RISs) have recently gained significant interest as an emerging technology for future wireless networks. This paper studies an RIS-assisted propagation environment, where a single-antenna source transmits…

The increasing demand for high data rates and seamless connectivity in wireless systems has sparked significant interest in reconfigurable intelligent surfaces (RIS) and artificial intelligence-based wireless applications. RIS typically…

In this paper, the precoding design is investigated for maximizing the throughput of millimeter wave (mmWave) multiple-input multiple-output (MIMO) systems with obstructed direct communication paths. In particular, a reconfigurable…

信号处理 · 电气工程与系统科学 2025-10-01 Po-Heng Chou , Ching-Wen Chen , Wan-Jen Huang , Walid Saad , Yu Tsao , Ronald Y. Chang