More Than the Eye Can See: Coherence Time and Coherence Bandwidth of Troposcatter Links for Mobile Receivers

Dinc, Ergin; Akan, Özgür B.

doi:10.1109/mvt.2015.2410786

Cited by 20 publications

(7 citation statements)

References 9 publications

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“…All known traditional methods of increasing capacity and noise immunity of over-horizon troposcatter communication focusing on improving equipment efficiency, responsible for forming, processing and direct signal transmission between two ground stations [6]- [8].…”

Section: Introductionmentioning

confidence: 99%

Troposcatter Communication Link Model Based on Ray-Tracing

Ilchenko

Kravchuk

Міночкін

et al. 2018

Information and Telecommunication Sciences

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Background. At present, the demand in tropospheric over-the-horizon communication systems determines the inherent advantages of these systems over satellite and radio-relay systems of direct visibility, especially in combat and emergency situations. Although the fundamentals of the theory of tropospheric scattering were developed as early as the middle of the last century, the development of over-the-horizon systems requires constant refinements of known theoretical positions in accordance with new data on the nature of tropospheric scattering, atmospheric inhomogeneities, capabilities of new methods for calculating and estimating radio propagation. Objective. The aim of the work is to develop a radio link model of a trans-horizon tropospheric communication to study the possibility of controlling (improving) attenuation on such a route by changing the electrophysical characteristics of the environment, in particular atmospheric turbulence, or using artificial formations in the atmosphere. Methods. The created model is based on the Ray-tracing method. Results. A model of radio link losses in the over-horizon tropospheric communication (long-range tropospheric propagation) was developed, based on the ray-tracing technique in two versions: simplified, with homogeneous layers, and full, with a combination of blocks of structures of scattering spheres in each of the layers. A study of the possibility of improving attenuation along the tropospheric scattering pathway by regulating changes in the electrophysical parameters of inhomogeneities and artificial formations in the atmosphere was conducted. Conclusions. The convergence of the results of the simulation with the data obtained by known / traditional analytical models for calculating the losses on the tropospheric scattering path confirms the adequacy of the proposed model to the statistical data of the real losses in tropospheric scattering. The obtained results indicate that, for practical purposes, the accuracy of calculations of the loss characteristics is sufficient and that they can be used to form a tropospheric dispersion route with significantly reduced loss values by artificially adding a certain liquid or solid substance to the atmospheric heterogeneity.

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Section: Introductionmentioning

confidence: 99%

Troposcatter Communication Link Model Based on Ray-Tracing

Ilchenko

Kravchuk

Міночкін

et al. 2018

Information and Telecommunication Sciences

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“…Because the PSO algorithm possesses fast convergence speed, concise parameter settings and is not limited by whether the objective function is continuous or differential, it has been widely used in function fitting. In this paper, we apply the PSO algorithm to fit the parameters in (26).…”

Section: Particle Swarm Optimisation Algorithmmentioning

confidence: 99%

Troposcatter transmission loss prediction based on particle swarm optimisation

Yuan

Chen

2021

IET Microwaves Antenna & Prop

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Tropospheric scatter is a promising method for over‐the‐horizon propagation. Transmission loss caused by the three mainstream troposcatter mechanisms is analysed, namely turbulent incoherent scattering theory, coherent reflection by stable layers theory, and incoherent reflection by irregular layers theory. Then an experiment is conducted to explore the relationships among the three mechanisms. Based on this experiment, the troposcatter transmission loss prediction model is established in different climate zones by a particle swarm optimisation algorithm and experimental data from the global troposcatter databank. The simulation shows that this model is more effective than the existing International Telecommunication Union‐Radiocommunication Sector (ITU‐R) P.617, P.452, and P.2001. Furthermore, by analysing the training parameters' proportion of the new model in different climate zones, the specific composition of three troposcatter mechanisms can be obtained.

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“…Другие особенности современных тропосферных систем связи, а также новые теоретические изыскания в области тропосферной связи изложены в материалах [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. Среди них отметим создание станции СВЧ диапазона, работающей по схеме "точка-многоточка" [24].…”

Section: рис 1 зарубежные мобильные малогабаритные цифровые тропосфunclassified

Состояние И Направления Развития Мобильных Цифровых Тропосферных Систем Связи

Почерняев¹,

Повхлеб²

2018

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1 Одесская национальная академия связи им. А.С. Попова, Киев 2 Киевский колледж связи, Киев СОСТОЯНИЕ И НАПРАВЛЕНИЯ РАЗВИТИЯ МОБИЛЬНЫХ ЦИФРОВЫХ ТРОПОСФЕРНЫХ СИСТЕМ СВЯЗИ В статье проанализированы недостатки существующих отечественных мобильных средств тропосферной связи. Целью работы является формулирование путей совершенствования мобильных цифровых тропосферных станций в Украине. Показано, что проблему развития военных систем цифровой тропосферной связи необходимо решать комплексно. Представлены варианты построения мобильных комбинированных радиосистем СВЧ диапазона на примере цифровой тропосферно-радиорелейной станции. Сформулированы направления проведения опытно-конструкторских работ по совершенствованию мобильных средств тропосферной связи: модернизация существующих средств тропосферной связи, включая создание станций, работающих по схеме "точка-многоточка"; разработка комбинированных цифровых тропосферно-радиорелейных станций; создание мобильных малогабаритных цифровых тропосферных станций. Ключевые слова: мобильные средства тропосферной связи, мобильная цифровая тропосфернорадиорелейная станция, транспортная сеть военной системы связи.

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More Than the Eye Can See: Coherence Time and Coherence Bandwidth of Troposcatter Links for Mobile Receivers

Cited by 20 publications

References 9 publications

Troposcatter Communication Link Model Based on Ray-Tracing

Troposcatter Communication Link Model Based on Ray-Tracing

Troposcatter transmission loss prediction based on particle swarm optimisation

Состояние И Направления Развития Мобильных Цифровых Тропосферных Систем Связи

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