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With the installation of next-generation phased array feed (PAF) receivers on radio telescopes, there is an urgent need to develop effective and computationally efficient radio frequency interference (RFI) mitigation methods for large-scale…

Instrumentation and Methods for Astrophysics · Physics 2026-01-21 Juntao Bai , Shi Dai , Na Wang , Stefan Osłowski , Shuangqiang Wang , George Hobbs , Jianping Yuan , Wenming Yan , Qijun Zhi , Lunhua Shang , Xin Xu , Shijun Dang , De Zhao

We present two algorithms to identify and flag radio frequency interference (RFI) in radio interferometric imaging data. The first algorithm utilizes the redundancy of visibilities inside a UV cell in the visibility plane to identify…

Instrumentation and Methods for Astrophysics · Physics 2018-06-27 Srikrishna Sekhar , Ramana Athreya

Modern radio astronomy instruments generate vast amounts of data, and the increasingly challenging radio frequency interference (RFI) environment necessitates ever-more sophisticated RFI rejection algorithms. The "needle in a haystack"…

Signal Processing · Electrical Eng. & Systems 2024-01-22 Peter Xiangyuan Ma , Steve Croft , Chris Lintott , Andrew P. V. Siemion

In neutral hydrogen (HI) galaxy survey, a significant challenge is to identify and extract the HI galaxy signal from observational data contaminated by radio frequency interference (RFI). For a drift-scan survey, or more generally a survey…

Instrumentation and Methods for Astrophysics · Physics 2023-04-27 Ruxi Liang , Furen Deng , Zepei Yang , Chunming Li , Feiyu Zhao , Botao Yang , Shuanghao Shu , Wenxiu Yang , Shifan Zuo , Yichao Li , Yougang Wang , Xuelei Chen

Radio frequency fingerprint identification (RFFI) exploits device-specific hardware impairments for transmitter recognition, but its performance is highly vulnerable to receiver variations and changing wireless channels in cross-receiver…

Signal Processing · Electrical Eng. & Systems 2026-03-10 Jiashuo He , Yumeng Wang , Feiyang He , Sai Huang , Yiheng Liu , Shuo Chang , Zhiyong Feng

Radio Frequency Interference (RFI) is one of the systematic challenges preventing 21cm interferometric instruments from detecting the Epoch of Reionization. To mitigate the effects of RFI on data analysis pipelines, numerous inpaint…

Radio spectroscopy provides a unique inspection perspective for solar and space weather research, which can reveal the plasma and energetic electron information in the solar corona and inner heliosphere. However, Radio-Frequency…

Solar and Stellar Astrophysics · Physics 2023-02-22 Peijin Zhang , André R. Offringa , Pietro Zucca , Kamen Kozarev , Mattia Mancini

Infrared small target detection is a challenging task due to its unique characteristics (e.g., small, dim, shapeless and changeable). Recently published CNN-based methods have achieved promising performance with heavy feature extraction and…

Computer Vision and Pattern Recognition · Computer Science 2025-10-31 Yongxian Liu , Boyang Li , Ting Liu , Zaiping Lin , Wei An

Retinal blood vessel segmentation is crucial for diagnosing ocular and cardiovascular diseases. Although the introduction of U-Net in 2015 by Olaf Ronneberger significantly advanced this field, yet issues like limited training data,…

Image and Video Processing · Electrical Eng. & Systems 2025-06-04 Md Tauhidul Islam , Wu Da-Wen , Tang Qing-Qing , Zhao Kai-Yang , Yin Teng , Li Yan-Fei , Shang Wen-Yi , Liu Jing-Yu , Zhang Hai-Xian

Radio-frequency interference (RFI) is becoming an increasingly significant problem for most radio telescopes. Working with Green Bank Telescope data from PSR J1730+0747 in the form of complex-valued channelized voltages and their respective…

Instrumentation and Methods for Astrophysics · Physics 2024-08-14 Zhicheng Cao , Natalia A. Schmid , Kevin Bandura , Duncan R. Lorimer , Morgan Dameron , Katelyn Crockett , Clayton Grubick , Andreas Schmid , Shaonan Zheng

With the rapid development of deep learning, a variety of change detection methods based on deep learning have emerged in recent years. However, these methods usually require a large number of training samples to train the network model, so…

Computer Vision and Pattern Recognition · Computer Science 2023-11-08 Weidong Yan , Pei Yan , Li Cao

Radio frequency fingerprint identification (RFFI) is a key technique for wireless network security, leveraging intrinsic hardware imperfections to enable transmitter identification. Although deep neural networks are effective at extracting…

Machine Learning · Computer Science 2026-05-27 Yuhao Pan , Xiucheng Wang , Fushuo Huo , Nan Cheng , Wenchao Xu

Radio astronomy is facing critical challenges due to an ever-increasing human-made signal density filling up the radio spectrum. With the rise of satellites, mobile networks, and other wireless technologies, radio telescopes are struggling…

Instrumentation and Methods for Astrophysics · Physics 2025-12-24 Kaushal D. Buch , Thushara Gunaratne , Gregory Hellbourg , Cedric Viou , Benjamin Winkel

Increasing levels of Radio Frequency Interference (RFI) are a problem for research in radio astronomy. Various techniques to suppress RFI and extract astronomical signals from data affected by interference are being tried out. However,…

Astrophysics · Physics 2007-05-23 K. Jeeva Priya , D. Anish Roshi

In recent years, monocular depth estimation is applied to understand the surrounding 3D environment and has made great progress. However, there is an ill-posed problem on how to gain depth information directly from a single image. With the…

Computer Vision and Pattern Recognition · Computer Science 2021-07-15 Meiqi Pei

Remote sensing image change detection aims to identify the differences between images acquired at different times in the same area. It is widely used in land management, environmental monitoring, disaster assessment and other fields.…

Computer Vision and Pattern Recognition · Computer Science 2023-08-07 Huan Zhong , Chen Wu

We address the critical problem of interference rejection in radio-frequency (RF) signals using a data-driven approach that leverages deep-learning methods. A primary contribution of this paper is the introduction of the RF Challenge, which…

Signal Processing · Electrical Eng. & Systems 2025-07-29 Alejandro Lancho , Amir Weiss , Gary C. F. Lee , Tejas Jayashankar , Binoy Kurien , Yury Polyanskiy , Gregory W. Wornell

Radio Frequency Interference (RFI) greatly reduces sensitivity of radio observations to astrophysical signals and creates false positive candidates in searches for radio transients. Real signals are missed while considerable computational…

Instrumentation and Methods for Astrophysics · Physics 2025-10-06 Joseph W. Kania , Kevin Bandura , Duncan R. Lorimer , Richard Prestage

Machine learning research in GNSS radio frequency interference (RFI) detection often lacks a clear empirical justification for the choice of deep learning architectures over simpler machine learning approaches. In this work, we argue for a…

Signal Processing · Electrical Eng. & Systems 2025-04-15 Viktor Ivanov , Richard C. Wilson , Maurizio Scaramuzza

The advancements in deep learning technologies have produced immense contributions to biomedical image analysis applications. With breast cancer being the common deadliest disease among women, early detection is the key means to improve…

Image and Video Processing · Electrical Eng. & Systems 2022-02-04 Narinder Singh Punn , Sonali Agarwal