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Titolo:
Wideband scattering functions for HF ionospheric propagation channels
Autore:
Gherm, VE; Zernov, VV; Lundborg, B; Darnell, M; Strangeways, HJ;
Indirizzi:
Univ Leeds, Inst Integrated Informat Syst, Sch Elect & Elect Engn, Leeds LS2 9JT, W Yorkshire, England Univ Leeds Leeds W Yorkshire England LS2 9JT S2 9JT, W Yorkshire, England FOI, Linkoping, Sweden FOI Linkoping SwedenFOI, Linkoping, Sweden St Petersburg State Univ, St Petersburg, Russia St Petersburg State Univ St Petersburg Russia iv, St Petersburg, Russia
Titolo Testata:
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS
fascicolo: 14, volume: 63, anno: 2001,
pagine: 1489 - 1497
SICI:
1364-6826(200109)63:14<1489:WSFFHI>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
BAND PULSE-PROPAGATION; FLUCTUATING IONOSPHERE; COHERENCE FUNCTION; 2-FREQUENCY; FREQUENCY;
Keywords:
sky wave ionospheric channel; fluctuating ionosphere; anisotropy; scattering function;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Strangeways, HJ Univ Leeds, Inst Integrated Informat Syst, Sch Elect & Elect Engn, Leeds LS2 9JT, W Yorkshire, England Univ Leeds Leeds W Yorkshire England LS2 9JT ire, England
Citazione:
V.E. Gherm et al., "Wideband scattering functions for HF ionospheric propagation channels", J ATMOS S-P, 63(14), 2001, pp. 1489-1497

Abstract

A physically based method has been developed to simulate the wideband HF ionospheric propagation channel relevant to the case of wideband spread spectrum HF communications and also other HF applications such as digital broadcasting and over-the-horizon radar, It is based on the consideration and solution of the equations governing pulse signal propagation through a fluctuating time varying random ionosphere. The wideband scattering function has been constructed as the appropriate Fourier transform of the correlation function of a channel impulse response. Numerical codes have been written, which allow numerical simulation of the wideband scattering function of the HF sky wave ionospheric fluctuation channel for any given model of the background ionosphere and time varying ionospheric turbulence with an anisotropic inverse power law spatial spectrum and frozen drift of the ionospheric inhomogeneitics. When employed in the simulation of the scattering function for real conditions of propagation, the method provides the possibility of analysing the propagation effects for different relative bandwidths of the background channel, fluctuating channel and transmitted pulse. The effects of the transmitted pulse bandwidth and anisotropy of the irregularities havebeen studied. The numerical results have been obtained and presented, which demonstrate the contribution of the effects enumerated in the wideband scattering function of the HF ionospheric channel. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/20 alle ore 13:15:48