scholarly journals Electromagnetic Compatibility Studies: LTE BS vs. Aeronautical Radionavigation Services in 694-790 MHz Frequency Band

2014 ◽  
Vol 6 (1) ◽  
pp. 38-44 ◽  
Author(s):  
Evaldas Stankevičius ◽  
Šarūnas Oberauskas
Keyword(s):  
Monte Carlo ◽  
Frequency Band ◽  
Electromagnetic Compatibility ◽  
Software Tool ◽  
Statistical Simulation ◽  
Mobile Services ◽  
Separation Distance ◽  
Base Stations ◽  
Simulation Monte Carlo ◽  
Two Phases

Abstract This paper presents the sharing analysis of the 694–790 MHz frequency band for Mobile services IMT and Aeronautical radio-navigation services (ARNS) using SEAMCAT (established by CEPT) software based on the statistical simulation (Monte-Carlo) method. In 2012 the World Radiocommunication Conference (WRC-12) decided to allocate the 694–790 MHz frequency band (the so-called 700 MHz band) to mobile services IMT (excluding aeronautical mobile) after WRC-15 conference. But this agreement raises electromagnetic compatibility problems, which should be solved until WRC-15 [1]. This study was carried out in two phases: first applying theoretical analysis, then statistical Monte-Carlo simulations with SEAMCAT software tool in order to verify results obtained in theoretical approach. Analytical calculations shows that the required protection distances between ARNS stations and the MS base stations are 132 km. The obtained results from SEAMCAT simulations indicate that separation distance should be above 100 km. These results illustrate that the systems are not electromagnetically compatible. The possible mitigation technic could be antenna pattern correction.

scholarly journals Estimation of Electromagnetic Compatibility Between DVB-T/DVB-T2 and 4G/5G in the 700 MHz Band for Co-Channel Case

2020 ◽  
Vol 57 (5) ◽  
pp. 30-38
Author(s):  
G. Ancans ◽  
E. Stankevicius ◽  
V. Bobrovs ◽  
G. Ivanovs
Keyword(s):  
Monte Carlo ◽  
Mobile Networks ◽  
Electromagnetic Compatibility ◽  
Mobile Radiocommunication ◽  
Mobile Network ◽  
Separation Distance ◽  
Propagation Model ◽  
Base Stations ◽  
Mobile Service ◽  
The World

AbstractThe 694–790 MHz band (700 MHz) known also as the second digital dividend was allocated to the mobile radiocommunication service on a primary basis in Region 1 and identified to International Mobile Telecommunications by the World Radiocommunication Conference 2012 (WRC-12). The designation of mobile service in Europe and other countries of Region 1 in 700 MHz band was obtained after the World Radiocommunication Conference 2015 (WRC-15). Administrations of Region 1 will be able to plan and use these frequencies for mobile networks, including IMT. The goal of this study is to estimate the electromagnetic compatibility of Digital Video Broadcasting – Terrestrial (DVB-T/DVB-T2) and LTE (Long Term Evolution) technology operating both in 700 MHz band. The study assumes frequency division duplex (FDD) channel arrangement of 703–733 MHz (for uplink) and of 758–788 MHz (for downlink).The model contains two parts: a DVB-T/DVB-T2 system and LTE mobile broadband network. Co-channel scenario is considered in this paper, and possible impact of DVB-T/DVB-T2 on LTE base stations (receivers) is also investigated. The Monte Carlo simulations within SEAMCAT software and the Minimum Coupling Loss (MCL) method are used for interference investigation. The coordination trigger field strength value predetermined by GE06 Agreement is also used in this study. The Monte Carlo method presents more relaxed electromagnetic compatibility scenario in comparison with the MCL method. For SEAMCAT simulations, ITU-R P.1546-5 radio propagation model is used.The obtained results present the required minimum separation distance between DVB-T/DVB-T2 and LTE networks in the 694–790 MHz in order to provide the necessary performance of LTE mobile network.

EMC PROVISION PROBLEMS OF RAILWAY LTE-1800 COMMUNICATION NETWORKS FOR THE NONSTANDARDIZED FREQUENCY BAN

2020 ◽  
Author(s):  
С.В. ТЕРЕНТЬЕВ ◽  
М.А. ШЕЛКОВНИКОВ ◽  
В.О. ТИХВИНСКИЙ ◽  
Е.Е. ДЕВЯТКИН
Keyword(s):  
Communication Networks ◽  
Frequency Band ◽  
Electromagnetic Compatibility ◽  
Band 3 ◽  
Access Networks ◽  
Base Stations ◽  
Radio Access Networks ◽  
Mobile Operator ◽  
Radio Access ◽  
The Subject

Предметом статьи является исследование электромагнитной совместимости (ЭМС) базовых станций LTE нестандартизованного частотного диапазона 1785-1805 МГц с временным дуплексом (TDD) для технологической связи на железныхдорогах и базовых станций LTE-1800 с частотным дуплексом (FDD) операторов мобильной связи частотного диапазона Band 3. Актуальность исследований обусловлена будущим внедрением технологической сети LTE-1800 TDD для организации беспроводной связи на железных дорогах и разработкой условий ЭМС с существующими сетями радиодоступа E-UTRAN FDD операторов мобильной связи, работающих в примыкающих частотных диапазонах 1710-1785 и 1805-1880 МГц. The subject of this article is a study of electromagnetic compatibility (EMC) conditions of LTE-1800 TDD base stations for railways technological communications in the non-standardized frequency band 1785-1805 MHz and LTE-1800 FDD base stations of traditional mobile operator networks of the Band 3 frequency band. The relevance of the research is due to the future deployment of technological railway LTE-1800 TDD communication networks and the development of EMC conditions with the existing E-UTRAN FDD radio access networks of mobile operators operating in the adjacent frequency ranges 1710-1785 MHz and 1805-1880 MHz.

scholarly journals LTE FDD AND SRD EQUIPMENT COMPATIBILITY IN 2500 MHZ BAND / LTE FDD IR SRD ĮRENGINIŲ SUDERINAMUMAS 2500 MHZ RUOŽE

2014 ◽  
Vol 6 (2) ◽  
pp. 206-210
Author(s):  
Evaldas Stankevičius
Keyword(s):  
Frequency Band ◽  
Short Range ◽  
Electromagnetic Compatibility ◽  
Base Stations ◽  
Software Systems ◽  
Frequency Channel ◽  
Channel Distribution ◽  
Mobile Stations ◽  
Communication Devices ◽  
Downlink Channels

This paper examines the LTE mobile communication base stations possible interfering effects on short range communication devices operating in ISM frequency band. LTE network is running in 2500–2690 MHz frequency band, where frequency channel distribution is used. Downlink channels are assigned to base stations and formed in 2620–2680 MHz band, uplink channels are assigned to mobile stations and formed in 2500–2560 MHz band. Short range communication devices operate in 2400–2483.5 MHz frequency range. The main problem of this study – the interference probability and magnitude. Real equipment was simulated using two different modelling software systems for investigation of electromagnetic compatibility: ICS Telecom and Seamcat. The modelling results show that LTE BS have minimum or no impact on operation of short range communication devices in ISM frequency band. Nagrinėjamas LTE mobiliojo ryšio bazinių stočių galimas interferencinis poveikis nedidelio veikimo nuotolio įrenginiams. LTE tinklas veikia 2500–2690 MHz dažnių ruože, naudojamas dažninis kanalų dalijimas. Žemynkrypčiai kanalai, priskiriami bazinėms stotims, formuojami 2620–2680 MHz ruože, aukštynkrypčiai kanalai, priskiriami mobiliosioms stotims, formuojami 2500–2560 MHz ruože. Trumpojo veikimo nuotolio įrenginiai veikia 2400–2483,5 MHz dažnių ruože. Pagrindinė šio tyrimo problema – galima interferencija ir jos mastas. Realus įrenginių veikimas modeliuojamas dviejomis skirtingomis programomis, kurios skirtos elektromagnetiniam suderinamumui tirti: ICS Telecom ir Seamcat.

L'attaque radiolytique de l'ADN est modulée par la conformation. Simulation Monte Carlo

1998 ◽  
Vol 95 (4) ◽  
pp. 674-681
Author(s):  
M. Begusová ◽  
L. Tartier ◽  
C. Savoye ◽  
D. Sy ◽  
M. Spotheim-Maurizot ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Simulation Monte Carlo

Numerical Methods for the Kinetic Theory of Fluids

2018 ◽  
Author(s):  
Sauro Succi
Keyword(s):  
Molecular Dynamics ◽  
Monte Carlo ◽  
Numerical Methods ◽  
Kinetic Theory ◽  
Computational Efficiency ◽  
Lattice Boltzmann ◽  
Direct Simulation Monte Carlo ◽  
Particle Methods ◽  
Direct Simulation ◽  
Simulation Monte Carlo

This chapter provides a bird’s eye view of the main numerical particle methods used in the kinetic theory of fluids, the main purpose being of locating Lattice Boltzmann in the broader context of computational kinetic theory. The leading numerical methods for dense and rarified fluids are Molecular Dynamics (MD) and Direct Simulation Monte Carlo (DSMC), respectively. These methods date of the mid 50s and 60s, respectively, and, ever since, they have undergone a series of impressive developments and refinements which have turned them in major tools of investigation, discovery and design. However, they are both very demanding on computational grounds, which motivates a ceaseless demand for new and improved variants aimed at enhancing their computational efficiency without losing physical fidelity and vice versa, enhance their physical fidelity without compromising computational viability.

Study on the Deposition Profile Characteristics in the Micron-Scale Trench Using Direct Simulation Monte Carlo Method

1998 ◽  
Vol 120 (2) ◽  
pp. 296-302 ◽  
Author(s):  
Masato Ikegawa ◽  
Jun’ichi Kobayashi ◽  
Morihisa Maruko
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Method ◽  
Boundary Conditions ◽  
Gas Flow ◽  
Direct Simulation Monte Carlo ◽  
Low Pressure ◽  
Sputter Deposition ◽  
Direct Simulation ◽  
Simulation Monte Carlo ◽  
Profile Characteristics

As integrated circuits are advancing toward smaller device features, step-coverage in submicron trenches and holes in thin film deposition are becoming of concern. Deposition consists of gas flow in the vapor phase and film growth in the solid phase. A deposition profile simulator using the direct simulation Monte Carlo method has been developed to investigate deposition profile characteristics on small trenches which have nearly the same dimension as the mean free path of molecules. This simulator can be applied to several deposition processes such as sputter deposition, and atmospheric- or low-pressure chemical vapor deposition. In the case of low-pressure processes such as sputter deposition, upstream boundary conditions of the trenches can be calculated by means of rarefied gas flow analysis in the reactor. The effects of upstream boundary conditions, molecular collisions, sticking coefficients, and surface migration on deposition profiles in the trenches were clarified.

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