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Channel state information (CSI) is of pivotal importance as it enables wireless systems to adapt transmission parameters more accurately, thus improving the system's overall performance. However, it becomes challenging to acquire accurate…

Signal Processing · Electrical Eng. & Systems 2022-08-12 Muhammad Karam Shehzad , Luca Rose , Muhammad Furqan Azam , Mohamad Assaad

The concept of deploying a large number of antennas at the base station, often called massive multiple-input multiple-output (MIMO), has drawn considerable interest because of its potential ability to revolutionize current wireless…

Information Theory · Computer Science 2015-06-17 Junil Choi , David J. Love , Patrick Bidigare

THz band enabled large scale massive MIMO (M-MIMO) is considered as a key enabler for the 6G technology, given its enormous bandwidth and for its low latency connectivity. In the large-scale M-MIMO configuration, enlarged array aperture and…

Information Theory · Computer Science 2024-09-26 Pulok Tarafder , Imtiaz Ahmed , Danda B. Rawat , Ramesh Annavajjala , Kumar Vijay Mishra

Massive multiple-input multiple-output (MIMO) system is promising in providing unprecedentedly high data rate. To achieve its full potential, the transceiver needs complete channel state information (CSI) to perform transmit/receive…

Information Theory · Computer Science 2022-02-08 Yu Zhang , Ahmed Alkhateeb , Pranav Madadi , Jeongho Jeon , Joonyoung Cho , Charlie Zhang

The cell-free massive multi-input multi-output (CF-mMIMO) is a promising technology for the six generation (6G) communication systems. Channel prediction will play an important role in obtaining the accurate CSI to improve the performance…

Signal Processing · Electrical Eng. & Systems 2025-10-24 Yongning Qi , Tao Zhou , Zuowei Xiang , Liu Liu , Bo Ai

Massive multiple-input multiple-output (MIMO) systems achieve high sum spectral efficiency by offering an order of magnitude increase in multiplexing gains. In time division duplexing systems, however, the reuse of uplink training pilots…

Information Theory · Computer Science 2016-10-14 Ahmed Alkhateeb , Geert Leus , Robert W. Heath

In this work, we propose a convolutional neural network (CNN) based low-complexity approach for downlink (DL) channel estimation (CE) in frequency division duplex (FDD) systems. In contrast to existing work, we use training data which…

Information Theory · Computer Science 2021-05-26 B. Fesl , N. Turan , M. Koller , M. Joham , W. Utschick

This letter introduces a deep learning (DL) framework for direction-of-arrival (DOA) estimation. Previous works in DL context mostly consider a single or two target scenario which is a strong limitation in practice. Hence, in this work, we…

Signal Processing · Electrical Eng. & Systems 2020-04-28 Ahmet M. Elbir

This work establishes a framework of near-field communication under different array geometries of extremely large-scale multiple-input multiple-output (XL-MIMO). We first formulate the near-field spatial non-stationary channel model which…

Signal Processing · Electrical Eng. & Systems 2026-05-19 Kangda Zhi , Yi Song , Tianyu Yang , Tuo Wu , Tengjiao Wang , Songyan Xue , Fangzhou Wu , Giuseppe Caire

Deep learning has been widely applied for the channel state information (CSI) feedback in frequency division duplexing (FDD) massive multiple-input multiple-output (MIMO) system. For the typical supervised training of the feedback model,…

Information Theory · Computer Science 2022-07-26 Boyuan Zhang , Haozhen Li , Xin Liang , Xinyu Gu , Lin Zhang

This paper aims to predict radio channel variations over time by deep learning from channel observations without knowledge of the underlying channel dynamics. In next-generation wideband cellular systems, multicarrier transmission for…

Information Theory · Computer Science 2022-03-14 Heunchul Lee , Jaeseong Jeong , Zhao Wang

Based on its great successes in inference and denosing tasks, Dictionary Learning (DL) and its related sparse optimization formulations have garnered a lot of research interest. While most solutions have focused on single layer…

Machine Learning · Computer Science 2021-04-22 Wen Tang , Emilie Chouzenoux , Jean-Christophe Pesquet , Hamid Krim

A novel precoding method based on supervised deep neural networks is introduced for the multiple-input multiple-output Gaussian wiretap channel. The proposed deep learning (DL)-based precoding learns the input covariance matrix through…

Information Theory · Computer Science 2019-09-18 Xinliang Zhang , Mojtaba Vaezi

Downlink channel estimation remains a significant bottleneck in reconfigurable intelligent surface-assisted cell-free multiple-input multiple-output communication systems. Conventional approaches primarily rely on centralized deep learning…

Information Theory · Computer Science 2025-02-11 Nan Qi , Haoxuan Liu , Theodoros A. Tsiftsis , Alexandros-Apostolos A. Boulogeorgos , Fuhui Zhou , Shi Jin , Qihui Wu

Full-dimensional (FD) channel state information at transmitter (CSIT) has always been a major limitation of the spectral efficiency of cellular multi-input multi-output (MIMO) networks. This letter proposes an FD-directional spatial channel…

Information Theory · Computer Science 2018-06-12 Ali A. Esswie , Octavia A. Dobre , Salama Ikki

The ever-growing complexity of optical communication systems and networks demands sophisticated methodologies to extract meaningful insights from vast amounts of heterogeneous data. Machine learning (ML) and deep learning (DL) have emerged…

Signal Processing · Electrical Eng. & Systems 2024-12-25 M. A. Amirabadi , S. A. Nezamalhosseini , M. H. Kahaei , Lawrence R. Chen

Channel estimation is a difficult problem in MIMO systems. Using a physical model allows to ease the problem, injecting a priori information based on the physics of propagation. However, such models rest on simplifying assumptions and…

Signal Processing · Electrical Eng. & Systems 2021-05-28 Luc Le Magoarou , Stéphane Paquelet

Deep learning (DL) has introduced a new paradigm in multiple-input multiple-output (MIMO) detection, balancing performance and complexity. However, the practical deployment of DL-based detectors is hindered by poor generalization,…

Signal Processing · Electrical Eng. & Systems 2025-03-24 Jinya Zhang , Jiajia Guo , Xiangyi Li , Chao-Kai Wen , Xin Geng , Shi Jin

The advancement of fifth generation (5G) wireless communication networks has created a greater demand for wireless resource management solutions that offer high data rates, extensive coverage, minimal latency and energy-efficient…

Information Theory · Computer Science 2023-09-29 Cemil Vahapoglu , Timothy J. O'Shea , Tamoghna Roy , Sennur Ulukus

In this paper, we develop a deep learning (DL)-guided hybrid beam and power allocation approach for multiuser millimeter-wave (mmWave) networks, which facilitates swift beamforming at the base station (BS). The following persisting…

Signal Processing · Electrical Eng. & Systems 2023-05-24 Yuwen Cao , Tomoaki Ohtsuki , Setareh Maghsudi , Tony Q. S. Quek