Tootfinder

Spectrum Sensing with Deep Clustering: Label-Free Radio Access Technology Recognition
Ljupcho Milosheski, Mihael Mohor\v{c}i\v{c}, Carolina Fortuna
https://arxiv.org/abs/2508.01709

Spectrum Sensing with Deep Clustering: Label-Free Radio Access Technology Recognition
The growth of the number of connected devices and network densification is driving an increasing demand for radio network resources, particularly Radio Frequency (RF) spectrum. Given the dynamic and complex nature of contemporary wireless environments, characterized by a wide variety of devices and multiple RATs, spectrum sensing is envisioned to become a building component of future 6G, including as a component within O-RAN or digital twins. However, the current SotA research for RAT classific…

This https://arxiv.org/abs/2501.12614 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Electric field reconstruction with three polarizations for the radio detection of ultra-high energy particles
Accurate reconstruction of the electric field produced by Extensive Air Showers from the signals recorded by the antennas is essential for the radio detection technique, as the key parameters needed to retrieve information about the primary particle that generated the shower are the amplitude, polarization, frequency spectrum and energy fluence carried by the electric field at each measurement position. Conventional electric field reconstruction methods primarily focus on antennas with two hori…

Symbiotic Backscatter Communication: A Design Perspective on the Modulation Scheme of Backscatter Devices
Yinghui Ye, Shuang Lu, Liqin Shi, Xiaoli Chu, Sumei Sun
https://arxiv.org/abs/2507.01782

Symbiotic Backscatter Communication: A Design Perspective on the Modulation Scheme of Backscatter Devices
Symbiotic Backscatter Communication (SBC) has emerged as a spectrum-efficient and low-power communication technology, where backscatter devices (BDs) modulate and reflect incident radio frequency (RF) signals from primary transmitters (PTs). While previous studies have assumed a circularly symmetric complex Gaussian (CSCG) distribution for the BD's signal, this assumption may not be practical because the high complexity of generating CSCG signals is not supported by the low-cost BD. In this pap…

RIS-MAE: A Self-Supervised Modulation Classification Method Based on Raw IQ Signals and Masked Autoencoder
Yunfei Liu, Mingxuan Liu, Wupeng Xie, Xinzhu Liu, Wenxue Liu, Yangang Sun, Xin Qiu, Cui Yuan, Jinhai Li
https://arxiv.org/abs/2508.00274

RIS-MAE: A Self-Supervised Modulation Classification Method Based on Raw IQ Signals and Masked Autoencoder
Automatic modulation classification (AMC) is a basic technology in intelligent wireless communication systems. It is important for tasks such as spectrum monitoring, cognitive radio, and secure communications. In recent years, deep learning methods have made great progress in AMC. However, mainstream methods still face two key problems. First, they often use time-frequency images instead of raw signals. This causes loss of key modulation features and reduces adaptability to different communicat…

Multi-frequency observations of PDS 70c: Radio emission mechanisms in the circum-planetary environment
Oriana Dominguez-Jamett, Simon Casassus, Hauyu Baobab Liu, Yuhiko Aoyama, Miguel Carcamo, Philipp Weber, Ondrej Chrenko, Gabriel-Dominique Marleau, Barbara Ercolano, Judit Szulagyi
https://arxiv.org/abs/2507.21970

Multi-frequency observations of PDS 70c: Radio emission mechanisms in the circum-planetary environment
PDS 70c is a source of Ha emission and variable sub-mm signal. Understanding its emission mechanisms may enable observations of accretion rates and physical conditions in the circum-planetary environment. We report ALMA observations of PDS 70 at 145 GHz (Band 4), 343.5 GHz (Band 7) and 671 GHz (Band 9) and compare with data at 97.5 GHz (Band 3), taken within two months. The radio spectrum (SED) is analyzed with analytic circumplanetary disk (CPD). In a novel approach we include the free-free co…

Terahertz for Radar applications and Wireless Communication
Sofiane Latreche, Hocine Bellahsene, Abdelmalik Taleb-Ahmed
https://arxiv.org/abs/2507.23076 https://

Terahertz for Radar applications and Wireless Communication
Technological advancements in the design of electronic and optical materials have opened up the possibility of utilizing the latest available Radio Frequency spectrum the Terahertz (THz) band. This band holds great promise for next-generation wireless systems, which are poised to seamlessly integrate a wide array of data-intensive and time-sensitive applications. In this article, we delve into the Terahertz band, providing insights into its properties and showcasing examples of its applications…

A Decentralized Framework for Radio-interferometric Image Reconstruction
S. Wang, S. Mignot, S. Prunet, L. Di Mascolo, M. Spinelli, A. Ferrari
https://arxiv.org/abs/2507.22128 h…

A Decentralized Framework for Radio-interferometric Image Reconstruction
The advent of large aperture arrays, such as the ones currently under construction for the SKA project, allows for observing the Universe in the radio-spectrum at unprecedented resolution and sensitivity. To process the enormous amounts of data produced by these telescopes, scalable software pipelines are required. This paper helps address this by proposing a framework that allows for decentralized radio-interferometric image reconstruction, parallelizing by spatial frequency. This is achieved …

A narrowband burst from FRB 20190520B simultaneously observed by FAST and Parkes
Yuhao Zhu, Chenhui Niu, Shi Dai, Di Li, Pei Wang, Yi Feng, Jingwen Wu, Yongkun Zhang, Xianghan Cui, Junshuo Zhang, Jinhuang Cao
https://arxiv.org/abs/2507.17696

A narrowband burst from FRB 20190520B simultaneously observed by FAST and Parkes
Fast Radio Bursts (FRBs) are short-duration radio transients with mysterious origins. Since its uncertainty, there are very few FRBs that are observed by different instruments, simultaneously. This study presents a detailed analysis of a burst from FRB 20190520B observed by FAST and Parkes at the same time. The spectrum of this individual burst ended at the upper limit of the FAST frequency band and was simultaneously detected by the Parkes telescope in the 1.5-1.8 GHz range. By employing spect…

Joint Spectrum Sensing and Resource Allocation for OFDMA-based Underwater Acoustic Communications
Minwoo Kim, Youngchol Choi, Yeongjun Kim, Eojin Seo, Hyun Jong Yang
https://arxiv.org/abs/2506.13008

Joint Spectrum Sensing and Resource Allocation for OFDMA-based Underwater Acoustic Communications
Underwater acoustic (UWA) communications generally rely on cognitive radio (CR)-based ad-hoc networks due to challenges such as long propagation delay, limited channel resources, and high attenuation. To address the constraints of limited frequency resources, UWA communications have recently incorporated orthogonal frequency division multiple access (OFDMA), significantly enhancing spectral efficiency (SE) through multiplexing gains. Still, {the} low propagation speed of UWA signals, combined w…

Electric-Field Reconstruction for Radio Detection of Inclined Air Showers in Three Polarizations
Kewen Zhang, Lukas G\"ulzow, Tim Huege, Ramesh Koirala, Pengxiong Ma, Mat\'ias Tueros, Xin Xu, Chao Zhang, Pengfei Zhang, Yi Zhang
https://arxiv.org/abs/2507.06874

Electric-Field Reconstruction for Radio Detection of Inclined Air Showers in Three Polarizations
Accurate reconstruction of the electric field produced by extensive air showers is essential for the radio-detection technique, as the key parameters of interest of the primary particles that generated the showers are the amplitude, polarization, frequency spectrum, and energy fluence carried by the electric field at each receiving radio antenna. Conventional electric-field reconstruction methods primarily focus on antennas with two horizontal polarizations. In this work, we introduce an analyt…

PRATUSH experiment concept and design overview
Mayuri Sathyanarayana Rao, Saurabh Singh, Srivani K S, Girish B S, Keerthipriya Satish, Somashekar R, Raghunathan Agaram, Kavitha Kalyanasundaram, Gautam Vishwapriya, Ashish Anand, Udaya Shankar N, Seetha S
https://arxiv.org/abs/2507.05654

PRATUSH experiment concept and design overview
PRATUSH -- Probing ReionizATion of the Universe using Signal from Hydrogen -- is a proposed cosmology experiment to detect the global red-shifted 21-cm signal from the Cosmic Dawn and Epoch of Reionization (CD/EoR). PRATUSH orbiting the Moon will seek to precisely measure the low-frequency radio sky-spectrum over 40 to 200 MHz. The scientific observations would be made in the radio-quiet region when in the farside of the Moon, and the data would be transmitted back to Earth when in the near-sid…