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Channel charting, an unsupervised learning method that learns a low-dimensional representation from channel information to preserve geometrical property of physical space of user equipments (UEs), has drawn many attentions from both…

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This paper addresses the problem of very large-scale image retrieval, focusing on improving its accuracy and robustness. We target enhanced robustness of search to factors such as variations in illumination, object appearance and scale,…

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Recently, attention mechanisms have been explored with ConvNets, both across the spatial and channel dimensions. However, from our knowledge, all the existing methods devote the attention modules to capture local interactions from a…

Computer Vision and Pattern Recognition · Computer Science 2022-11-28 Eslam Mohamed Bakr , Ahmad El Sallab , Mohsen A. Rashwan

Foundation model-based semantic transmission has recently shown great potential in wireless image communication. However, existing methods exhibit two major limitations: (i) they overlook the varying importance of semantic components for…

Image and Video Processing · Electrical Eng. & Systems 2025-09-30 Fangyu Liu , Peiwen Jiang , Wenjin Wang , Chao-Kai Wen , Shi Jin , Jun Zhang

We consider the problem of spatial channel covariance matrix (CCM) estimation for intelligent reflecting surface (IRS)-assisted millimeter wave (mmWave) communication systems. Spatial CCM is essential for two-timescale beamforming in…

Signal Processing · Electrical Eng. & Systems 2022-04-19 Hongwei Wang , Jun Fang , Huiping Duan , Hongbin Li

Recently, deep-learning-based super-resolution methods have achieved excellent performances, but mainly focus on training a single generalized deep network by feeding numerous samples. Yet intuitively, each image has its representation, and…

Image and Video Processing · Electrical Eng. & Systems 2021-11-17 Yuanfei Huang , Jie Li , Yanting Hu , Xinbo Gao , Hua Huang

\textit{Why does the literature consider the channel-state-information (CSI) as a 2/3-D image? What are the pros-and-cons of this consideration for accuracy-complexity trade-off?} Next generations of wireless communications require…

Information Theory · Computer Science 2020-01-22 Makan Zamanipour

For intelligent reflecting surface (IRS)-aided wireless communications, channel estimation is essential and usually requires excessive channel training overhead when the number of IRS reflecting elements is large. The acquisition of…

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The identification of channel scenarios in wireless systems plays a crucial role in channel modeling, radio fingerprint positioning, and transceiver design. Traditional methods to classify channel scenarios are based on typical statistical…

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Although achieving significant progress, existing deep generative inpainting methods are far from real-world applications due to the low generalization across different scenes. As a result, the generated images usually contain artifacts or…

Computer Vision and Pattern Recognition · Computer Science 2022-03-15 Xiaoguang Li , Qing Guo , Di Lin , Ping Li , Wei Feng , Song Wang

The acquisition of accurate channel state information (CSI) is of utmost importance since it provides performance improvement of wireless communication systems. However, acquiring accurate CSI, which can be done through channel estimation…

Information Theory · Computer Science 2023-06-01 Pedro E. G. Silva , Jules M. Moualeu , Pedro H. Nardelli , Rausley A. A. de Souza

Large-scale channel prediction, i.e., estimation of the pathloss from geographical/morphological/building maps, is an essential component of wireless network planning. Ray tracing (RT)-based methods have been widely used for many years, but…

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Channel charting (CC) consists in learning a mapping between the space of raw channel observations, made available from pilot-based channel estimation in multicarrier multiantenna system, and a low-dimensional space where close points…

Signal Processing · Electrical Eng. & Systems 2024-07-24 Taha Yassine , Luc Le Magoarou , Matthieu Crussière , Stephane Paquelet

Acquiring channel state information (CSI) through traditional methods, such as channel estimation, is increasingly challenging for the emerging sixth generation (6G) mobile networks due to high overhead. To address this issue, channel…

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Most convolutional network (CNN)-based inpainting methods adopt standard convolution to indistinguishably treat valid pixels and holes, making them limited in handling irregular holes and more likely to generate inpainting results with…

Computer Vision and Pattern Recognition · Computer Science 2019-09-06 Chaohao Xie , Shaohui Liu , Chao Li , Ming-Ming Cheng , Wangmeng Zuo , Xiao Liu , Shilei Wen , Errui Ding

In-memory computing is an emerging computing paradigm that could enable deeplearning inference at significantly higher energy efficiency and reduced latency. The essential idea is to map the synaptic weights corresponding to each layer to…

Machine Learning · Computer Science 2019-06-11 Martino Dazzi , Abu Sebastian , Pier Andrea Francese , Thomas Parnell , Luca Benini , Evangelos Eleftheriou

Next-generation wireless systems such as 6G operate at higher frequency bands, making signal propagation highly sensitive to environmental factors such as buildings and vege- tation. Accurate Radio Environment Map (REM) estimation is…

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Mobile traffic prediction is an important enabler for optimizing resource allocation and improving energy efficiency in mobile wireless networks. Building on the advanced contextual understanding and generative capabilities of large…

Networking and Internet Architecture · Computer Science 2025-06-17 Han Zhang , Akram Bin Sediq , Ali Afana , Melike Erol-Kantarci

Image inpainting, the process of filling in missing areas in an image, is a common image editing technique. Inpainting can be used to conceal or alter image contents in malicious manipulation of images, driving the need for research in…

Computer Vision and Pattern Recognition · Computer Science 2025-07-01 Ye Yao , Tingfeng Han , Shan Jia , Siwei Lyu

This paper proposes a new knowledge distillation method tailored for image semantic segmentation, termed Intra- and Inter-Class Knowledge Distillation (I2CKD). The focus of this method is on capturing and transferring knowledge between the…

Computer Vision and Pattern Recognition · Computer Science 2025-09-01 Ayoub Karine , Thibault Napoléon , Maher Jridi