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This paper deals with the problem of localization in a cellular network in a dense urban scenario. Global Navigation Satellite System typically performs poorly in urban environments when there is no line-of-sight between the devices and the…

Signal Processing · Electrical Eng. & Systems 2020-06-11 Çağkan Yapar , Ron Levie , Gitta Kutyniok , Giuseppe Caire

Radio maps enable intelligent wireless applications by capturing the spatial distribution of channel characteristics. However, conventional construction methods demand extensive location-labeled data, which are costly and impractical in…

Artificial Intelligence · Computer Science 2025-12-17 Zheng Xing , Junting Chen

Channel estimation is very challenging when the receiver is equipped with a limited number of radio-frequency (RF) chains in beamspace millimeter-wave (mmWave) massive multiple-input and multiple-output systems. To solve this problem, we…

Information Theory · Computer Science 2019-01-15 Hengtao He , Chao-Kai Wen , Shi Jin , Geoffrey Ye Li

To gain panoramic awareness of spectrum coverage in complex wireless environments, data-driven learning approaches have recently been introduced for radio map estimation (RME). While existing deep learning based methods conduct RME given…

Machine Learning · Computer Science 2025-02-04 Dong Yang , Yue Wang , Songyang Zhang , Yingshu Li , Zhipeng Cai

Wireless channel propagation parameter estimation forms the foundation of channel sounding, estimation, modeling, and sensing. This paper introduces a Deep Learning approach for joint delay- and Doppler estimation from frequency and time…

Signal Processing · Electrical Eng. & Systems 2025-10-22 Steffen Schieler , Sebastian Semper , Reiner Thomä

Radio map is an efficient demonstration for visually displaying the wireless signal coverage within a certain region. It has been considered to be increasingly helpful for the future sixth generation (6G) of wireless networks, as wireless…

Signal Processing · Electrical Eng. & Systems 2024-08-29 Shuhang Zhang , Shuai Jiang , Wanjie Lin , Zheng Fang , Kangjun Liu , Hongliang Zhang , Ke Chen

Phase-Based Ranging (PBR) offers several advantages for estimating distances between wirelessly connected devices, including high accuracy over large distances and the removal of the need for antenna arrays at each transceiver. This study…

Signal Processing · Electrical Eng. & Systems 2025-11-26 Pantelis Stefanakis , Ming Shen

In the emerging high mobility Vehicle-to-Everything (V2X) communications using millimeter Wave (mmWave) and sub-THz, Multiple-Input Multiple-Output (MIMO) channel estimation is an extremely challenging task. At mmWaves/sub-THz frequencies,…

In the rapidly growing development of the Internet of Things (IoT) infrastructure, achieving reliable wireless communication is a challenge. IoT devices operate in diverse environments with common signal interference and fluctuating channel…

Machine Learning · Computer Science 2024-05-22 Samrah Arif , Muhammad Arif Khan , Sabih Ur Rehman

This study presents the first comprehensive comparison of rule-based methods, traditional machine learning models, and deep learning models in radio wave sensing with frequency modulated continuous wave multiple input multiple output radar.…

Computer Vision and Pattern Recognition · Computer Science 2025-12-16 Tomoya Tanaka , Tomonori Ikeda , Ryo Yonemoto

Modeling indoor radio propagation is crucial for wireless network planning and optimization. However, existing approaches often rely on labor-intensive manual modeling of geometry and material properties, resulting in limited scalability…

Machine Learning · Computer Science 2025-11-18 Yu Zheng , Kezhi Wang , Wenji Xi , Gang Yu , Jiming Chen , Jie Zhang

As communication networks evolve towards greater complexity (e.g., 6G and beyond), a deep understanding of the wireless environment becomes increasingly crucial. When explicit knowledge of the environment is unavailable, geometry-aware…

Systems and Control · Electrical Eng. & Systems 2025-10-27 Wangqian Chen , Junting Chen , Shuguang Cui

The radio wave propagation channel is central to the performance of wireless communication systems. In this paper, we introduce a novel machine learning-empowered methodology for wireless channel modeling. The key ingredients include a…

Signal Processing · Electrical Eng. & Systems 2024-06-26 Ge Cao , Zhen Peng

Providing rich and useful information regarding spectrum activities and propagation channels, radiomaps characterize the detailed distribution of power spectral density (PSD) and are important tools for network planning in modern wireless…

Signal Processing · Electrical Eng. & Systems 2023-05-26 Songyang Zhang , Tianhang Yu , Brian Choi , Feng Ouyang , Zhi Ding

To encourage further research and to facilitate fair comparisons in the development of deep learning-based radio propagation models, in the less explored case of directional radio signal emissions in indoor propagation environments, we have…

Signal Processing · Electrical Eng. & Systems 2025-01-24 Stefanos Bakirtzis , Çağkan Yapar , Kehai Qiu , Ian Wassell , Jie Zhang

This paper reports the findings of an experimental study on the problem of line-of-sight (LOS)/non-line-of-sight (NLOS) classification in an indoor environment. Specifically, we deploy a pair of NI 2901 USRP software-defined radios (SDR) in…

Signal Processing · Electrical Eng. & Systems 2023-08-01 Muhammad Asim , Muhammad Ozair Iqbal , Waqas Aman , Muhammad Mahboob Ur Rahman , Qammer H. Abbasi

Accurate depth estimation from images is a fundamental task in many applications including scene understanding and reconstruction. Existing solutions for depth estimation often produce blurry approximations of low resolution. This paper…

Computer Vision and Pattern Recognition · Computer Science 2019-03-12 Ibraheem Alhashim , Peter Wonka

Depth estimation is of critical interest for scene understanding and accurate 3D reconstruction. Most recent approaches in depth estimation with deep learning exploit geometrical structures of standard sharp images to predict corresponding…

Computer Vision and Pattern Recognition · Computer Science 2018-09-07 Marcela Carvalho , Bertrand Le Saux , Pauline Trouvé-Peloux , Andrés Almansa , Frédéric Champagnat

The goal of metric learning is to learn a function that maps samples to a lower-dimensional space where similar samples lie closer than dissimilar ones. Particularly, deep metric learning utilizes neural networks to learn such a mapping.…

Computer Vision and Pattern Recognition · Computer Science 2021-06-14 Jenny Seidenschwarz , Ismail Elezi , Laura Leal-Taixé

Radio path loss prediction (RPP) is critical for optimizing 5G networks and enabling IoT, smart city, and similar applications. However, current deep learning-based RPP methods lack proactive environmental modeling, struggle with realistic…

Machine Learning · Computer Science 2026-03-30 Zhijie Zhong , Zhiwen Yu , Pengyu Li , Jianming Lv , C. L. Philip Chen , Min Chen
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