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The Physics of Fast Radio Bursts

open access: yesReviews of Modern Physics, 2023
Fast radio bursts (FRBs), millisecond-duration bursts prevailing in the radio sky, are the latest big puzzle in the universe and have been a subject of intense observational and theoretical investigations in recent years. The rapid accumulation of the observational data has painted the following sketch about the physical origin of FRBs: They ...
Bing Zhang
exaly   +4 more sources

Physics of Radio-Frequency Plasmas

open access: yes, 2011
Low-temperature radio frequency plasmas are essential in various sectors of advanced technology, from micro-engineering to spacecraft propulsion systems and efficient sources of light. The subject lies at the complex interfaces between physics, chemistry and engineering.
Pascal Chabert
exaly   +4 more sources

The Physics of Fast Radio Bursts [PDF]

open access: yesScience China: Physics, Mechanics and Astronomy, 2021
In 2007, a very bright radio pulse was identified in the archival data of the Parkes Telescope in Australia, marking the beginning of a new research branch in astrophysics. In 2013, this kind of millisecond bursts with extremely high brightness temperature takes a unified name, fast radio burst (FRB).
Di Xiao, Zigao Dai, Fayin Wang
exaly   +3 more sources

MeerKAT Uncovers the Physics of an Odd Radio Circle

open access: yesMonthly Notices of the Royal Astronomical Society, 2022
ABSTRACT Odd radio circles (ORCs) are recently-discovered faint diffuse circles of radio emission, of unknown cause, surrounding galaxies at moderate redshift (z ∼ 0.2 – 0.6). Here, we present detailed new MeerKAT radio images at 1284 MHz of the first ORC, originally discovered with the Australian Square Kilometre Array Pathfinder, with ...
Stanislav Shabala   +2 more
exaly   +4 more sources
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Learning Radio Maps for Physical-Layer Security in the Radio Access

2019 IEEE 20th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), 2019
While there is an evident trend towards “strengthening” the notion of secrecy in information-theoretic analyses, there remains the question of the assumptions under which the promises of physical-layer security may be delivered. A critical aspect here is the level of knowledge of the inherently uncertain wireless environment, required in order to be ...
Zoran Utkovski   +4 more
openaire   +2 more sources

Chaos, Periodicity, and Quasiperiodicity in a Radio-Physical Oscillator

International Journal of Bifurcation and Chaos, 2017
We report parameter planes displaying dynamical behaviors of a radio-physical oscillator system, which is modeled by a set of four-parameter three autonomous first-order nonlinear ordinary differential equations. Each parameter plane is numerically computed, and the dynamical behavior of each point is characterized by using the respective Lyapunov ...
Vinícius Wiggers, Paulo C. Rech
openaire   +3 more sources

Communications Techniques in Radio Physics and Astronomy

IEEE Communications Magazine, 1986
Techniques used at the Arecibo Observatory's giant radio telescope in the areas of planetary radar astronomy, passive radio astronomy, and radar studies of the ionosphere and neutral atmosphere are described. Pulse compression, range-Doppler processing, and digital decoding in planetary studies are examined.
exaly   +2 more sources

Quantum Radio Frequency Physics

Physics Bulletin, 1966
D. Stepin (translated by Scripta Technica Inc.; edited by H. H. Stroke) Cambridge, Mass: M.I.T. Press. 1965. Pp. viii + 227. Price £2 17s. This book aims to provide an introduction to electron and nuclear magnetic resonance, masers and radiofrequency spectrometry. It concludes with a chapter on ammonia-beam oscillators.
openaire   +1 more source

On physical layer security for cognitive radio networks

IEEE Network, 2013
In this article we explore the security issues on physical layer for cognitive radio networks. First we give an overview on several existing security attacks to the physical layer in cognitive radio networks. We then discuss the related countermeasures on how to defend against these attacks.
Shu, Zhihui, Qian, Yi, Ci, Song
openaire   +2 more sources

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