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Radio astronomy observational facilities are under constant upgradation and development to achieve better capabilities including increasing the time and frequency resolutions of the recorded data, and increasing the receiving and recording…

Instrumentation and Methods for Astrophysics · Physics 2017-11-07 Tao An , Xiao Chen , P. Mohan , Bao-Qiang Lao

In radio astronomy, radio frequency interference (RFI) becomes more and more serious for radio observational facilities. The RFI always influences the search and study of the interesting astronomical objects. Mitigating the RFI becomes an…

Instrumentation and Methods for Astrophysics · Physics 2021-12-03 Chuan-Peng Zhang , Jin-Long Xu , Jie Wang , Yingjie Jing , Ziming Liu , Ming Zhu , Peng Jiang

The CHIME radio telescope operates in the frequency bandwidth of 400 to 800 MHz. The CHIME/FRB collaboration has a data pipeline that analyzes the data in real time, suppresses radio frequency interferences (RFI) and searches for FRBs.…

Instrumentation and Methods for Astrophysics · Physics 2023-11-21 K. J. Luke

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

The discovery and study of pulsars and Fast Radio Bursts (FRBs) in time-domain radio data is often hampered by radio frequency interference (RFI). Some of this terrestrial RFI is impulsive and bright, and relatively easy to identify and…

High Energy Astrophysical Phenomena · Physics 2021-06-09 Yogesh Maan , Joeri van Leeuwen , Dany Vohl

The sensitivity of radio astronomical stations is often limited by man-made radio frequency interference (RFI) due to a variety of terrestrial activities. An RFI mitigation subsystem (RFIMS) based on real-time digital signalprocessing is…

Instrumentation and Methods for Astrophysics · Physics 2015-05-20 P. A. Fridman , W. A. Baan , R. P. Millenaar

We investigate characteristics of radio frequency interference (RFI) signals that can affect the excision potential of some interference mitigation algorithms. The techniques considered are those that modify signals from auxiliary reference…

Instrumentation and Methods for Astrophysics · Physics 2010-04-01 D. A. Mitchell , J. G. Robertson

In response to the rapid growth of Internet of Things (IoT) devices and rising security risks, Radio Frequency Fingerprint (RFF) has become key for device identification and authentication. However, various changing factors - beyond the RFF…

Signal Processing · Electrical Eng. & Systems 2025-08-19 Yezhuo Zhang , Zinan Zhou , Guangyu Li , Xuanpeng Li

Noisy labels are both inevitable and problematic in machine learning methods, as they negatively impact models' generalization ability by causing overfitting. In the context of learning with noise, the transition matrix plays a crucial role…

Machine Learning · Computer Science 2025-03-26 Jiahui Li , Tai-Wei Chang , Kun Kuang , Ximing Li , Long Chen , Jun Zhou

Radio-frequency interference (RFI) presents a significant obstacle to current radio interferometry experiments aimed at the Epoch of Reionization. RFI contamination is often several orders of magnitude brighter than the astrophysical…

Instrumentation and Methods for Astrophysics · Physics 2025-03-05 Jade M. Ducharme , Jonathan C. Pober

Radio Frequency Interference (RFI) is threatening modern radio astronomy. A classic approach to mitigate its impact on astronomical data involves discarding the corrupted time and frequency data samples through a process called flagging and…

Signal Processing · Electrical Eng. & Systems 2020-07-28 Gregory Hellbourg , Ian Morrison

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

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

Radio frequency fingerprint identification (RFFI) is an emerging method for authenticating Internet of Things (IoT) devices. RFFI exploits the intrinsic and unique hardware imperfections for classifying IoT devices. Deep learning-based RFFI…

Cryptography and Security · Computer Science 2025-12-16 Jie Ma , Junqing Zhang , Guanxiong Shen , Linning Peng , Alan Marshall

The rapid development of new generation radio interferometers such as the Square Kilometer Array (SKA) has opened up unprecedented opportunities for astronomical research. However, anthropogenic Radio Frequency Interference (RFI) from…

Instrumentation and Methods for Astrophysics · Physics 2022-03-02 Haomin Sun , Hui Deng , Feng Wang , Ying Mei , Tingting Xu , Oleg Smirnov , Linhua Deng , Shoulin Wei

Radio frequency interference (RFI) already limits the sensitivity of existing radio telescopes in several frequency bands and may prove to be an even greater obstacle for future generation instruments to overcome. I aim to create a…

Instrumentation and Methods for Astrophysics · Physics 2015-03-17 P. A. Fridman

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

The rapid proliferation of low Earth orbit (LEO) satellite constellations has introduced a new class of radio frequency interference (RFI) that poses a fundamental challenge to modern radio astronomy. In particular, unintended…

Instrumentation and Methods for Astrophysics · Physics 2026-04-20 Yujin Kim