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Data augmentation is vital to the generalization ability and robustness of deep neural networks (DNNs) models. Existing augmentation methods for speaker verification manipulate the raw signal, which are time-consuming and the augmented…

Audio and Speech Processing · Electrical Eng. & Systems 2023-10-19 Yuanyuan Wang , Yang Zhang , Zhiyong Wu , Zhihan Yang , Tao Wei , Kun Zou , Helen Meng

Wi-Fi sensing uses radio-frequency signals from Wi-Fi devices to analyze environments, enabling tasks such as tracking people, detecting intrusions, and recognizing gestures. The rise of this technology is driven by the IEEE 802.11bf…

Machine Learning · Computer Science 2025-04-30 Danilo Avola , Federica Bruni , Gian Luca Foresti , Daniele Pannone , Amedeo Ranaldi

To circumvent the inherent fidelity bottlenecks and optimization misalignment of VAE-based latent diffusion, pixel-space diffusion models have emerged as a compelling end-to-end paradigm. However, existing pixel diffusion models often…

Computer Vision and Pattern Recognition · Computer Science 2026-05-19 Lichen Ma , Zipeng Guo , Yu He , Xiaolong Fu , Luohang Liu , Jingling Fu , Junshi Huang , Yan Li

Securing Internet of Things (IoT) devices presents increasing challenges due to their limited computational and energy resources. Radio Frequency Fingerprint Identification (RFFI) emerges as a promising authentication technique to identify…

Signal Processing · Electrical Eng. & Systems 2025-03-10 Guolin Yin , Junqing Zhang , Yuan Ding , Simon Cotton

Wireless sensing is of great benefits to our daily lives. However, wireless signals are sensitive to the surroundings. Various factors, e.g. environments, locations, and individuals, may induce extra impact on wireless propagation. Such a…

Machine Learning · Computer Science 2025-02-13 Rui Zhou , Yu Cheng , Songlin Li , Hongwang Zhang , Chenxu Liu

This paper presents DeepCRF, a new framework that harnesses deep learning to extract subtle micro-signals from channel state information (CSI) measurements, enabling robust and resilient radio-frequency fingerprinting (RFF) of…

Signal Processing · Electrical Eng. & Systems 2024-11-12 Ruiqi Kong , He Chen

The quality and size of training set have great impact on the results of deep learning-based face related tasks. However, collecting and labeling adequate samples with high quality and balanced distributions still remains a laborious and…

Computer Vision and Pattern Recognition · Computer Science 2020-04-06 Xiang Wang , Kai Wang , Shiguo Lian

Despite continued advancement in recent years, deep neural networks still rely on large amounts of training data to avoid overfitting. However, labeled training data for real-world applications such as healthcare is limited and difficult to…

In the realm of visual recognition, data augmentation stands out as a pivotal technique to amplify model robustness. Yet, a considerable number of existing methodologies lean heavily on heuristic foundations, rendering their intrinsic…

Computer Vision and Pattern Recognition · Computer Science 2023-11-23 Zhendong Liu , Jie Zhang , Qiangqiang He , Chongjun Wang

RF fingerprinting is emerging as a physical layer security scheme to identify illegitimate and/or unauthorized emitters sharing the RF spectrum. However, due to the lack of publicly accessible real-world datasets, most research focuses on…

Networking and Internet Architecture · Computer Science 2023-08-21 Anu Jagannath , Zackary Kane , Jithin Jagannath

Reconfigurable intelligent surfaces (RISs) are considered a promising technology for boosting the coverage and for enhancing the spectral efficiency of wireless systems, as well as for taming the wireless environment. The potential benefits…

Information Theory · Computer Science 2021-11-23 Bjorn Sihlbom , Marios I. Poulakis , Marco Di Renzo

Data augmentation is usually adopted to increase the amount of training data, prevent overfitting and improve the performance of deep models. However, in practice, random data augmentation, such as random image cropping, is low-efficiency…

Computer Vision and Pattern Recognition · Computer Science 2019-03-26 Tao Hu , Honggang Qi , Qingming Huang , Yan Lu

Deep learning-based RF fingerprinting offers great potential for improving the security robustness of various emerging wireless networks. Although much progress has been done in enhancing fingerprinting methods, the impact of device…

Cryptography and Security · Computer Science 2025-01-13 Abdurrahman Elmaghbub , Vincent Immler , Bechir Hamdaoui

Boosting is a learning scheme that combines weak prediction rules to produce a strong composite estimator, with the underlying intuition that one can obtain accurate prediction rules by combining "rough" ones. Although boosting is proved to…

Machine Learning · Computer Science 2015-05-07 Shaobo Lin , Yao Wang , Lin Xu

Radio frequency (RF) fingerprinting techniques provide a promising supplement to cryptography-based approaches but rely on dedicated equipment to capture in-phase and quadrature (IQ) samples, hindering their wide adoption. Recent advances…

Signal Processing · Electrical Eng. & Systems 2025-10-28 Yong Huang , Wenjing Wang , Dalong Zhang , Junjie Wang , Chen Chen , Yan Cao , Wei Wang

Distributed Acoustic Sensing (DAS) is a promising technology introducing a new paradigm in the acquisition of high-resolution seismic data. However, DAS data often show weak signals compared to the background noise, especially in tough…

Geophysics · Physics 2024-10-21 Omar M. Saad , Matteo Ravasi , Tariq Alkhalifah

This dissertation explores the impact of bias in deep neural networks and presents methods for reducing its influence on model performance. The first part begins by categorizing and describing potential sources of bias and errors in data…

Machine Learning · Computer Science 2023-08-21 Agnieszka Mikołajczyk-Bareła

Radio frequency fingerprint identification (RFFI) can uniquely classify wireless devices by analyzing the received signal distortions caused by the intrinsic hardware impairments. The state-of-the-art deep learning techniques such as…

Signal Processing · Electrical Eng. & Systems 2021-11-30 Guanxiong Shen , Junqing Zhang , Alan Marshall , Mikko Valkama , Joseph Cavallaro

Contrary to most machine learning models, modern deep artificial neural networks typically include multiple components that contribute to regularization. Despite the fact that some (explicit) regularization techniques, such as weight decay…

Computer Vision and Pattern Recognition · Computer Science 2020-11-13 Alex Hernández-García , Peter König

To reduce transmit power, increase throughput, and improve communication range, radio systems---such as IoT sensor networks, Wi-Fi and cellular networks---benefit from the ability to direct their signals, to ensure that more of the…

Networking and Internet Architecture · Computer Science 2019-05-14 Venkat Arun , Hari Balakrishnan