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This paper introduces a new mathematical framework, which is used to derive joint uplink/downlink achievable rate regions for multi-user spatial multiplexing between one base station and multiple terminals. The framework consists of two…

Information Theory · Computer Science 2010-02-03 Patrick Marsch , Peter Rost , Gerhard Fettweis

The first measured results for massive multiple-input, multiple-output (MIMO) performance in a line-of-sight (LOS) scenario with moderate mobility are presented, with 8 users served by a 100 antenna base Station (BS) at 3.7 GHz. When such a…

Massive multiple-input multiple-output (massive MIMO) can provide large spectral and energy efficiency gains. Nevertheless, its potential is conditioned on acquiring accurate channel state information (CSI). In time division duplexing (TDD)…

Information Theory · Computer Science 2018-05-01 Salah Eddine Hajri , Mohamad Assaad

Deep learning (DL) algorithms have shown significant performance in various computer vision tasks. However, having limited labelled data lead to a network overfitting problem, where network performance is bad on unseen data as compared to…

Computer Vision and Pattern Recognition · Computer Science 2023-03-14 Teerath Kumar , Alessandra Mileo , Rob Brennan , Malika Bendechache

With the development of Artificial Intelligence, numerous real-world tasks have been accomplished using technology integrated with deep learning. To achieve optimal performance, deep neural networks typically require large volumes of data…

Machine Learning · Computer Science 2025-05-09 Yuren Zhang , Zhongnan Pu , Lei Jing

To meet the goal of ten-fold increase in spectral efficiency, multiuser multiple-input-multiple-output (MU-MIMO) techniques capable of achieving high spatial multiplexing gains are expected to be an essential component of fifth-generation…

Information Theory · Computer Science 2016-11-15 Nassar Ksairi , Beatrice Tomasi , Stefano Tomasin

In many machine learning for healthcare tasks, standard datasets are constructed by amassing data across many, often fundamentally dissimilar, sources. But when does adding more data help, and when does it hinder progress on desired model…

Machine Learning · Computer Science 2024-08-09 Judy Hanwen Shen , Inioluwa Deborah Raji , Irene Y. Chen

Distributed optimization finds applications in large-scale machine learning, data processing and classification over multi-agent networks. In real-world scenarios, the communication network of agents may encounter latency that may affect…

Systems and Control · Electrical Eng. & Systems 2025-10-06 Mohammadreza Doostmohammadian , Narahari Kasagatta Ramesh , Alireza Aghasi

In wireless communication, accurate channel state information (CSI) is of pivotal importance. In practice, due to processing and feedback delays, estimated CSI can be outdated, which can severely deteriorate the performance of the…

Signal Processing · Electrical Eng. & Systems 2021-04-02 Muhammad Karam Shehzad , Luca Rose , Mohamad Assaad

Indoor localization is a challenging problem that - unlike outdoor localization - lacks a universal and robust solution. Machine Learning (ML), particularly Deep Learning (DL), methods have been investigated as a promising approach.…

Systems and Control · Electrical Eng. & Systems 2024-08-29 Omer Gokalp Serbetci , Daoud Burghal , Andreas F. Molisch

Gradient-based algorithms for training ResNets typically require a forward pass of the input data, followed by back-propagating the objective gradient to update parameters, which are time-consuming for deep ResNets. To break the…

Machine Learning · Computer Science 2021-02-19 Qi Sun , Hexin Dong , Zewei Chen , Weizhen Dian , Jiacheng Sun , Yitong Sun , Zhenguo Li , Bin Dong

Utilizing Deep Reinforcement Learning (DRL) for Reconfigurable Intelligent Surface (RIS) assisted wireless communication has been extensively researched. However, existing DRL methods either act as a simple optimizer or only solve problems…

Systems and Control · Electrical Eng. & Systems 2026-01-19 Meng-Qian Alexander Wu , Tzu-Hsien Sang , Luisa Schuhmacher , Ming-Jie Guo , Khodr Hammoud , Sofie Pollin

To achieve higher throughput in next-generation Wi-Fi systems, a station (STA) needs to efficiently compress channel state information (CSI) and feed it back to an access point (AP). In this paper, we propose a novel deep learning…

Signal Processing · Electrical Eng. & Systems 2025-07-16 Junyong Shin , Eunsung Jeon , Inhyoung Kim , Yo-Seb Jeon

The channel state information (CSI) needs to be fed back from the user equipment (UE) to the base station (BS) in frequency division duplexing (FDD) multiple-input multiple-output (MIMO) system. Recently, neural networks are widely applied…

Information Theory · Computer Science 2022-11-01 Zhilin Lu , Xudong Zhang , Rui Zeng , Jintao Wang

In an aerial hybrid massive multiple-input multiple-output (MIMO) and orthogonal frequency division multiplexing (OFDM) system, how to design a spectral-efficient broadband multi-user hybrid beamforming with a limited pilot and feedback…

Signal Processing · Electrical Eng. & Systems 2022-09-12 Zhen Gao , Minghui Wu , Chun Hu , Feifei Gao , Guanghui Wen , Dezhi Zheng , Jun Zhang

A core challenge in background subtraction (BGS) is handling videos with sudden illumination changes in consecutive frames. In this paper, we tackle the problem from a data point-of-view using data augmentation. Our method performs data…

Computer Vision and Pattern Recognition · Computer Science 2019-10-21 Dimitrios Sakkos , Hubert P. H. Shum , Edmond S. L. Ho

The first measured results for massive MIMO performance in a line-of-sight (LOS) scenario with moderate mobility are presented, with 8 users served in real-time using a 100-antenna base Station (BS) at 3.7 GHz. When such a large number of…

In frequency-division duplexing (FDD) multiple-input multiple-output (MIMO) systems, obtaining accurate downlink channel state information (CSI) for precoding is vastly challenging due to the tremendous feedback overhead with the growing…

Signal Processing · Electrical Eng. & Systems 2024-05-15 Jungyeon Kim , Jinseok Choi , Jeonghun Park , Ahmed Alkhateeb , Namyoon Lee

For the multiuser multiple-input multiple-output (MIMO) downlink channel, the users feedback their channel state information (CSI) to help the base station (BS) schedule users and improve the system sum rate. However, this incurs a large…

Information Theory · Computer Science 2011-03-22 Jin-Hao Li , Hsuan-Jung Su , Yu-Lun Tsai

Indoor localization is a challenging task. Compared to outdoor environments where GPS is dominant, there is no robust and almost-universal approach. Recently, machine learning (ML) has emerged as the most promising approach for achieving…

Signal Processing · Electrical Eng. & Systems 2023-05-18 Omer Gokalp Serbetci , Ju-Hyung Lee , Daoud Burghal , Andreas F. Molisch