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This paper presents a distributed beamforming framework for a constellation of airborne platform stations (APSs) in a massive Multiple-Input and Multiple-Output (MIMO) non-terrestrial network (NTN) that targets the downlink sum-rate…

信号处理 · 电气工程与系统科学 2026-01-01 Hesam Khoshkbari , Georges Kaddoum , Omid Abbasi , Bassant Selim , Halim Yanikomeroglu

Graph Neural Networks (GNNs) are powerful tools for learning graph-structured data, but their scalability is hindered by inefficient mini-batch generation, data transfer bottlenecks, and costly inter-GPU synchronization. Existing training…

机器学习 · 计算机科学 2026-01-09 Irfan Ullah , Young-Koo Lee

In this letter, we investigate the hybrid beamforming based on deep reinforcement learning (DRL) for millimeter Wave (mmWave) multi-user (MU) multiple-input-single-output (MISO) system. A multi-agent DRL method is proposed to solve the…

信号处理 · 电气工程与系统科学 2021-02-03 Qisheng Wang , Xiao Li , Shi Jin , Yijiain Chen

Beamforming is one of the key techniques in millimeter wave (mmWave) multi-input multi-output (MIMO) communications. Designing appropriate beamforming not only improves the quality and strength of the received signal, but also can help…

信号处理 · 电气工程与系统科学 2020-08-14 Xueyuan Wang , M. Cenk Gursoy

The performance of millimeter wave (mmWave) communications critically depends on the accuracy of beamforming both at base station (BS) and user terminals (UEs) due to high isotropic path-loss and channel attenuation. In high mobility…

信息论 · 计算机科学 2021-08-11 Saeid K. Dehkordi , Mari Kobayashi , Giuseppe Caire

This paper investigates the optimization of the long-standing probabilistically robust transmit beamforming problem with channel uncertainties in the multiuser multiple-input single-output (MISO) downlink transmission. This problem poses…

信息论 · 计算机科学 2024-06-06 Kai Liang , Gan Zheng , Zan Li , Kai-Kit Wong , Chan-Byoung Chae

Hybrid analog and digital BeamForming (HBF) is one of the enabling transceiver technologies for millimeter Wave (mmWave) Multiple Input Multiple Output (MIMO) systems. This technology offers highly directional communication, which is able…

信息论 · 计算机科学 2021-01-19 George C. Alexandropoulos , Ioanna Vinieratou , Mattia Rebato , Luca Rose , Michele Zorzi

A recent Graph Neural Network (GNN) approach for learning to branch has been shown to successfully reduce the running time of branch-and-bound algorithms for Mixed Integer Linear Programming (MILP). While the GNN relies on a GPU for…

机器学习 · 计算机科学 2020-10-26 Prateek Gupta , Maxime Gasse , Elias B. Khalil , M. Pawan Kumar , Andrea Lodi , Yoshua Bengio

Millimeter-wave (mmWave) communication systems, particularly those leveraging multi-user multiple-input and multiple-output (MU-MIMO) with hybrid beamforming, face challenges in optimizing user throughput and minimizing latency due to the…

信息论 · 计算机科学 2026-03-04 Ramin Hashemi , Vismika Ranasinghe , Teemu Veijalainen , Petteri Kela , Risto Wichman

Bidirectional recurrent neural networks (bi-RNNs), in particular, bidirectional long short term memory (bi-LSTM), bidirectional gated recurrent unit, and convolutional bi-LSTM models have recently attracted attention for nonlinearity…

信号处理 · 电气工程与系统科学 2022-07-26 Abtin Shahkarami , Mansoor Yousefi , Yves Jaouen

Reconfigurable intelligent surface (RIS) is emerging as a promising technology for next-generation wireless communication networks, offering a variety of merits such as the ability to tailor the communication environment. Moreover,…

信号处理 · 电气工程与系统科学 2025-04-22 Mengbing Liu , Chongwen Huang , Ahmed Alhammadi , Marco Di Renzo , Merouane Debbah , Chau Yuen

We study a deep learning (DL) based limited feedback methods for multi-antenna systems. Deep neural networks (DNNs) are introduced to replace an end-to-end limited feedback procedure including pilot-aided channel training process, channel…

信息论 · 计算机科学 2019-12-20 Jeonghyeon Jang , Hoon Lee , Sangwon Hwang , Haibao Ren , Inkyu Lee

Machine learning (ML) has been widely used for efficient resource allocation (RA) in wireless networks. Although superb performance is achieved on small and simple networks, most existing ML-based approaches are confronted with difficulties…

机器学习 · 计算机科学 2024-10-28 Xiaochen Zhang , Haitao Zhao , Jun Xiong , Li Zhou , Jibo Wei

Simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) has emerged as a promising technology to realize full-space coverage and boost spectral efficiency in next-generation wireless networks. Yet, the joint…

信号处理 · 电气工程与系统科学 2025-12-23 Dongdong Yang , Bin Li , Jiguang He , Yicheng Yan , Xiaoyu Zhang , Chongwen Huang

In terms of accuracy, Graph Neural Networks (GNNs) are the best architectural choice for the node classification task. Their drawback in real-world deployment is the latency that emerges from the neighbourhood processing operation. One…

机器学习 · 计算机科学 2024-11-22 Pavel Rumiantsev , Mark Coates

Multiple-input multiple-output (MIMO) systems play a key role in wireless communication technologies. A widely considered approach to realize scalable MIMO systems involves architectures comprised of multiple separate modules, each with its…

信号处理 · 电气工程与系统科学 2024-12-30 Ohad Levy , Nir Shlezinger

Supporting high mobility in millimeter wave (mmWave) systems enables a wide range of important applications such as vehicular communications and wireless virtual/augmented reality. Realizing this in practice, though, requires overcoming…

信息论 · 计算机科学 2019-02-25 Ahmed Alkhateeb , Sam Alex , Paul Varkey , Ying Li , Qi Qu , Djordje Tujkovic

This paper introduces a novel neural network framework called M2BeamLLM for beam prediction in millimeter-wave (mmWave) massive multi-input multi-output (mMIMO) communication systems. M2BeamLLM integrates multi-modal sensor data, including…

计算与语言 · 计算机科学 2025-06-18 Can Zheng , Jiguang He , Chung G. Kang , Guofa Cai , Zitong Yu , Merouane Debbah

Traditional Recurrent Neural Networks (RNNs) and Long Short-Term Memory (LSTM) units operate on discrete time steps, often failing to capture the fluid temporal dynamics of real-world physical processes. Liquid Neural Networks (LNNs),…

机器学习 · 计算机科学 2026-05-28 Ye Kyaw Thu , Thazin Myint Oo , Thepchai Supnithi

In this paper, we propose BeamLLM, a vision-aided millimeter-wave (mmWave) beam prediction framework leveraging large language models (LLMs) to address the challenges of high training overhead and latency in mmWave communication systems. By…

机器学习 · 计算机科学 2025-06-30 Can Zheng , Jiguang He , Guofa Cai , Zitong Yu , Chung G. Kang