Propagation Impairments for Arctic Satellite Telecommunication Systems

2012 ◽  
Author(s):  
David Rogers ◽  
Pierre BouchardCRC
Keyword(s):  
Satellite Telecommunication ◽  
Telecommunication Systems ◽  
Satellite Télécommunication

scholarly journals SATELLITE SEGMENT OF NATIONAL INFORMATION INFRASTRUCTURE. APPROACHES TO IMPLEMENTATION

2020 ◽  
pp. 14-46
Author(s):  
A.M. MELNYK ◽  
Keyword(s):  
Satellite Communications ◽  
Information Infrastructure ◽  
Technology Standards ◽  
Satellite Telecommunication ◽  
National Information Infrastructure ◽  
Telecommunication Systems ◽  
Radiated Power ◽  
Satellite Télécommunication ◽  
National Information ◽  
Communications System

It is proved that the satellite segment is a necessary component of the national information infrastructure. From this position, the state and development trends of satellite telecommunication systems and satellite channel organization technologies are analyzed. It is shown that there are two ways to build a satellite segment: based on the use of leased resources of satellite operators operating in the satellite communications market; based on the resources of the national satellite communications system, which still needs to be created. It is shown that satellite telecommunication systems have a steady tendency to increase the number of spacecraft, until the launch of “heavyˮ satellites with a payload of more than 70 transponders and to increase the frequency resource. The diagram of satellites location density of in orbit is given. In the case of orientation to rent the resources of active spacecraft, the criteria for their selection is indicated. The arc of the geostationary orbit, on which the satellite should be selected, is calculated. For satellites located on this arc, diagrams of equivalent isotropically radiated power values in the C and Ku bands, which they provide in Ukraine, are shown. A list of satellites that you can focus on, recommendations for selection and a list of recommended for the satellite segment is indicated. The technology standards used in payload and methods for organizing satellite communications channels is noticed. To select the parameters of the satellite segment, the results of calculations of the effectiveness of signal-code structures are provided. Approaches to creating a satellite segment of the national information infrastructure are proposed. It is shown that the orientation to the Lybid national satellite does not make sense; a new frequency-orbit resource is required. The types of platforms that can be used on a national satellite are considered.

scholarly journals SIMULATION OF COMPACT POLARIZERS FOR SATELLITE TELECOMMUNICATION SYSTEMS WITH THE ACCOUNT OF THICKNESS OF IRISES

2021 ◽  
Author(s):  
Andrew V. Bulashenko ◽  
Stepan I. Piltyay ◽  
Ivan V. Demchenko
Keyword(s):  
Mathematical Model ◽  
Design Parameters ◽  
Matrix Elements ◽  
Satellite Telecommunication ◽  
Telecommunication Systems ◽  
Satellite Télécommunication ◽  
Scattering Wave ◽  
The Matrix ◽  
Electromagnetic Characteristics ◽  
Ku Band

Background. One of the main problems in modern satellite telecommunication systems is to increase the volume of information transmission with simultaneous preservation of its quality. Key element of such systems is antenna systems with polarization processing, which is carried out using polarizers. Therefore, development of new polarizers and simple techniques for their analysis and optimization are important problems. The most simple, effective, technological and actual for analysis are polarizers based on waveguides with irises. Objective. The purpose of the paper is to create a mathematical model of the polarizer based on a square waveguide with irises, which allows analyzing the influence of polarizer’s design parameters on its electromagnetic characteristics. Methods. A mathematical model of the waveguide polarizer with irises is created by decomposition technique using transfer and scattering wave matrices. To take into account the irises’ thickness their equivalent T- and Π-shaped circuits were used. Results. We have developed mathematical model of the waveguide polarizer with irises, which takes into account their thickness and is based on the complete scattering wave matrix of the waveguide polarizer. The matrix has been obtained using the microwave circuit theory. The main characteristics of the waveguide polarizer were defined using matrix elements. The optimization of characteristics of a polarizer was carried out in the operating Ku-band 10.7–12.8 GHz. Conclusions. Suggested mathematical model of a waveguide polarizer with irises provides the account of heights of irises, distances between them and their thickness. The results obtained show that this model is simpler and faster for the calculation of electromagnetic characteristics compared to finite elements method, which is often used for analysis of microwave devices for various applications.

Diagnostics of primary arcing in electronics of satellite telecommunication systems

2015 ◽  
Author(s):  
Vasily Yu. Kozhevnikov ◽  
Andrey V. Kozyrev ◽  
Alexander V. Batrakov ◽  
Natalia S. Semeniuk ◽  
Vadim M. Karaban
Keyword(s):  
Satellite Telecommunication ◽  
Telecommunication Systems ◽  
Satellite Télécommunication

COMPACT KU-BAND IRIS POLARIZERS FOR SATELLITE TELECOMMUNICATION SYSTEMS

2020 ◽  
Vol 79 (19) ◽  
pp. 1673-1690
Author(s):  
Stepan I. Piltyay ◽  
O. Yu. Sushko ◽  
A. V. Bulashenko ◽  
I. V. Demchenko
Keyword(s):  
Satellite Telecommunication ◽  
Telecommunication Systems ◽  
Satellite Télécommunication ◽  
Ku Band

Design and diagnostics of arc-resistant electronics for satellite telecommunication systems

2016 ◽  
Author(s):  
Vasily Yu. Kozhevnikov ◽  
Andrey V. Kozyrev ◽  
Natalia S. Semeniuk ◽  
Alexander V. Batrakov ◽  
Vadim M. Karaban ◽  
...  
Keyword(s):  
Satellite Telecommunication ◽  
Telecommunication Systems ◽  
Satellite Télécommunication

scholarly journals SIMULATION OF COMPACT POLARIZERS FOR SATELLITE TELECOMMUNICATION SYSTEMS WITH THE ACCOUNT OF THICKNESS OF IRISES

2021 ◽  
Author(s):  
Stepan Piltyay
Keyword(s):  
Mathematical Model ◽  
Design Parameters ◽  
Matrix Elements ◽  
Satellite Telecommunication ◽  
Telecommunication Systems ◽  
Satellite Télécommunication ◽  
Scattering Wave ◽  
The Matrix ◽  
Electromagnetic Characteristics ◽  
Ku Band

Background. One of the main problems in modern satellite telecommunication systems is to increase the volume of information transmission with simultaneous preservation of its quality. Key element of such systems is antenna systems with polarization processing, which is carried out using polarizers. Therefore, development of new polarizers and simple techniques for their analysis and optimization are important problems. The most simple, effective, technological and actual for analysis are polarizers based on waveguides with irises.Objective. The purpose of the paper is to create a mathematical model of the polarizer based on a square waveguide with irises, which allows analyzing the influence of polarizer’s design parameters on its electromagnetic characteristics.Methods. A mathematical model of the waveguide polarizer with irises is created by decomposition technique using transfer and scattering wave matrices. To take into account the irises’ thickness their equivalent T- and Π-shaped circuits were used.Results. We have developed mathematical model of the waveguide polarizer with irises, which takes into account their thickness and is based on the complete scattering wave matrix of the waveguide polarizer. The matrix has been obtained using the microwave circuit theory. The main characteristics of the waveguide polarizer were defined using matrix elements. The optimization of characteristics of a polarizer was carried out in the operating Ku-band 10.7–12.8 GHz.Conclusions. Suggested mathematical model of a waveguide polarizer with irises provides the account of heights of irises, distances between them and their thickness. The results obtained show that this model is simpler and faster for the calculation of electromagnetic characteristics compared to finite elements method, which is often used for analysis of microwave devices for various applications.

Multiscale image compression for satellite telecommunication systems

2008 ◽  
Author(s):  
Valery H. Bagmanov ◽  
Svjatoslav V. Kharitonov ◽  
Ivan K. Meshkov ◽  
Albert H. Sultanov
Keyword(s):  
Image Compression ◽  
Satellite Telecommunication ◽  
Telecommunication Systems ◽  
Satellite Télécommunication

scholarly journals Development of algorithm for receiving and decoding input signal using MTD decoder for subscriber terminals operating with low-orbit spacecraft

2021 ◽  
pp. 59-63
Author(s):  
D. P. Sedunov ◽  
◽  
A. S. Zhunusova ◽  
Keyword(s):  
Computational Complexity ◽  
Input Signal ◽  
Data Transmission ◽  
Communication Channel ◽  
Radio Channel ◽  
Electronic Devices ◽  
Satellite Telecommunication ◽  
Telecommunication Systems ◽  
Satellite Télécommunication ◽  
Public Environment

The relevance of the topic is determined by the need to increase the speed of data transmission in satellite telecommunication systems through the use of noise-proof coding. The speed of data transmission in a radio channel is actually determined by the level of interference present due to the fact that the radio transmission medium is a public environment and other electronic devices operate in it. The purpose of the article is to develop an algorithm for encoding and decoding the input signal using a multithreshold decoder (MTD) of rigid solutions for subscriber terminals operating with low-orbit spacecraft (NCA), and its comparison with a conventional PC decoder «Messi». The comparison allows us to conclude that the application of the developed algorithm is justified in systems where more stringent requirements are imposed on the probability of an error in the communication channel, while the «Messi» decoder is more appropriate to use in the presence of restrictions on computational complexity

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