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Extremely large-scale multiple-input multiple-output (XL-MIMO) systems, operating in the near-field region due to their massive antenna arrays, are key enablers of next-generation wireless communications but face significant challenges in…

信号处理 · 电气工程与系统科学 2025-12-02 Tianqi Mao , Haiyang Li , Shufeng Tan , Pengyu Wang , Guangyao Liu , Ruiqi Liu , Leyi Zhang , Meng Hua , Dezhi Zheng , Zhaocheng Wang , Sheng Chen

Channel State Information (CSI) Feedback plays a crucial role in achieving higher gains through beamforming. However, for a massive MIMO system, this feedback overhead is huge and grows linearly with the number of antennas. To reduce the…

信号处理 · 电气工程与系统科学 2022-10-20 Sharan Mourya , SaiDhiraj Amuru , Kiran Kumar Kuchi

Empowered by deep neural networks (DNNs), Wi-Fi fingerprinting has recently achieved astonishing localization performance to facilitate many security-critical applications in wireless networks, but it is inevitably exposed to adversarial…

密码学与安全 · 计算机科学 2023-01-11 Fei Xiao , Yong Huang , Yingying Zuo , Wei Kuang , Wei Wang

In order to unlock the full advantages of massive multiple input multiple output (MIMO) in the downlink, channel state information (CSI) is required at the base station (BS) to optimize the beamforming matrices. In frequency division duplex…

信息论 · 计算机科学 2021-07-09 Yusha Liu , Osvaldo Simeone

WiFi-enabled Internet-of-Things (IoT) devices are evolving from mere communication devices to sensing instruments, leveraging Channel State Information (CSI) extraction capabilities. Nevertheless, resource-constrained IoT devices and the…

信息论 · 计算机科学 2024-09-10 Borna Barahimi , Hakam Singh , Hina Tabassum , Omer Waqar , Mohammad Omer

The realization of practical intelligent reflecting surface (IRS)-assisted multi-user communication (IRS-MUC) systems critically depends on the proper beamforming design exploiting accurate channel state information (CSI). However, channel…

信息论 · 计算机科学 2021-04-27 Chang Liu , Xuemeng Liu , Zhiqiang Wei , Shaokang Hu , Derrick Wing Kwan Ng , Jinhong Yuan

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…

信号处理 · 电气工程与系统科学 2025-07-16 Junyong Shin , Eunsung Jeon , Inhyoung Kim , Yo-Seb Jeon

Due to the over-fitting problem caused by imbalance samples, there is still room to improve the performance of data-driven automatic modulation classification (AMC) in noisy scenarios. By fully considering the signal characteristics, an AMC…

信号处理 · 电气工程与系统科学 2022-03-08 Hao Shi , Qi Peng , Yiqi Zhuang

Indoor localization is getting increasing demands for various cutting-edged technologies, like Virtual/Augmented reality and smart home. Traditional model-based localization suffers from significant computational overhead, so fingerprint…

信号处理 · 电气工程与系统科学 2023-09-26 Ruihao Yuan , Kaixuan Huang , Pan Yang , Shunqing Zhang

Missing/erroneous data is a major problem in today's world. Collected seismic data sometimes contain gaps due to multitude of reasons like interference and sensor malfunction. Gaps in seismic waveforms hamper further signal processing to…

信号处理 · 电气工程与系统科学 2024-06-26 Anshuman Gaharwar , Parth Parag Kulkarni , Joshua Dickey , Mubarak Shah

We address the problem of decomposing an image into albedo and shading. We propose the Fast Fourier Intrinsic Network, FFI-Net in short, that operates in the spectral domain, splitting the input into several spectral bands. Weights in…

计算机视觉与模式识别 · 计算机科学 2020-11-10 Yanlin Qian , Miaojing Shi , Joni-Kristian Kämäräinen , Jiri Matas

Wi-Fi sensing has emerged as a versatile tool for tasks such as localization, gesture recognition, and vital-sign monitoring, enabling applications from smart environments to personalized healthcare. However, sensing accuracy often…

信号处理 · 电气工程与系统科学 2026-05-27 Fabian Portner , Francesco Gringoli , Matthias Hollick , Arash Asadi

Beamforming (BF) design for large-scale antenna arrays with limited radio frequency chains and the phase-shifter-based analog BF architecture, has been recognized as a key issue in millimeter wave communication systems. It becomes more…

信息论 · 计算机科学 2020-01-16 Tian Lin , Yu Zhu

This paper studies the indoor localisation of WiFi devices based on a commodity chipset and standard channel sounding. First, we present a novel shallow neural network (SNN) in which features are extracted from the channel state information…

机器学习 · 计算机科学 2020-10-20 Peizheng Li , Han Cui , Aftab Khan , Usman Raza , Robert Piechocki , Angela Doufexi , Tim Farnham

Thanks to the ubiquitous deployment of Wi-Fi hotspots, channel state information (CSI)-based Wi-Fi sensing can unleash game-changing applications in many fields, such as healthcare, security, and entertainment. However, despite one decade…

网络与互联网体系结构 · 计算机科学 2023-02-03 Marco Cominelli , Francesco Gringoli , Francesco Restuccia

This work introduces DeepCRF, a deep learning framework designed for channel state information-based radio frequency fingerprinting (CSI-RFF). The considered CSI-RFF is built on micro-CSI, a recently discovered radio-frequency (RF)…

信号处理 · 电气工程与系统科学 2024-03-26 Ruiqi Kong , He Chen

Deep Neural Networks (DNNs) face interpretability challenges due to their opaque internal representations. While Feature Map Convergence Evaluation (FMCE) quantifies module-level convergence via Feature Map Convergence Scores (FMCS), it…

计算机视觉与模式识别 · 计算机科学 2025-08-19 Zhibo Zhu , Renyu Huang , Lei He

Different technologies have been proposed to provide indoor localisation: magnetic field, bluetooth , WiFi, etc. Among them, WiFi is the one with the highest availability and highest accuracy. This fact allows for an ubiquitous accurate…

Recent advancements have showcased the potential of handheld millimeter-wave (mmWave) imaging, which applies synthetic aperture radar (SAR) principles in portable settings. However, existing studies addressing handheld motion errors either…

计算机视觉与模式识别 · 计算机科学 2024-05-07 Yadong Li , Dongheng Zhang , Ruixu Geng , Jincheng Wu , Yang Hu , Qibin Sun , Yan Chen

Channel fingerprint (CF) is considered a key enabler for facilitating the acquisition of channel state information (CSI) in massive multiple-input multiple-output (MIMO) communication systems. In this work, we investigate a novel type of CF…

机器学习 · 计算机科学 2026-05-01 Zhenzhou Jin , Li You , Xiang-Gen Xia , Xiqi Gao