Begell House Inc.
Telecommunications and Radio Engineering
TRE
0040-2508
77
18
2018
COMPARISON OF EXACT AND APPROXIMATE ABSORBING CONDITIONS FOR INITIAL BOUNDARY VALUE PROBLEMS OF THE ELECTROMAGNETIC THEORY OF GRATINGS
1581-1595
10.1615/TelecomRadEng.v77.i18.10
V. L.
Pazynin
O.Ya. Usikov Institute for Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine
S. S.
Sautbekov
L.N. Gumilyov Eurasian National University, 2, Mirzoyana St., Astana 010000, Republic of Kazakhstan; Al-Farabi Kazakh National University, 71, al-Farabi Av., Almaty 050040, Republic of Kazakhstan
K. Yu.
Sirenko
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
Yuriy
Sirenko
IRE NAN Ukraine
A. A.
Vertiy
Ukrainian Institute for Scientific and Technical Expertise and Information, 180 Antovicha St., Kyiv 36150, Ukraine
N. P.
Yashina
O.Ya. Usikov Institute for Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine
initial boundary value problems
computational electromagnetic methods
method of exact absorbing conditions
periodic gratings
stability and convergence of computational schemes
resonance domain
The paper presents comparison of several exact and approximate absorbing conditions, which are used to truncate computation domains of open (unbounded) initial boundary value problems of the electromagnetic theory of gratings. This comparison allows to judge the reliability and efficiency of absorbing conditions widely used in computational practice. The paper demonstrates that in cases, when resonant wave scattering is possible, only exact absorbing conditions allow to preserve the stability and convergence of computational schemes, and to provide a required level of accuracy in calculating the diffraction characteristics of open periodic resonators.
STEGANALYSIS METHOD FOR DETECTION OF THE HIDDEN COMMUNICATION CHANNEL WITH LOW CAPACITY
1597-1604
10.1615/TelecomRadEng.v77.i18.20
I. I.
Bobok
Odesa National Polytechnic University, 1 Shevchenko Ave., Odesa 65044, Ukraine
the integrity of the digital image (DI)
singular numbers
errors of the first kind
the ability of the hidden communication channel
Two stegano-analytical methods, CM1 and CM2, were developed. The basis of these methods is a new generalized approach to the problem of detecting integrity violations of digital images, which uses the properties of singular numbers and singular vectors of blocks of the image matrix. The proposed methods serve to identify the steganographic communication channel, formed by the Least Significant Bit method. A digital image in lossy format is used as a
container. The methods CM1 and CM2 are effective for small values (less than 0.1 bit/pixel) of the latency channel capacity (LCC). Algorithms that implement methods are polynomial. Errors of the first kind are 1.7 and 1.3%, respectively, the errors of the second kind do not exceed 4% (LCC 0.01 bit/pixel). Existing modern analogues in conditions of such a small latency channel capacity do not work.
DESIGN AND ANALYSIS OF ENERGY EFFICIENT WIRELESS SENSOR NETWORKS FOR DIFFERENT APPLICATIONS AND VARIABLE DATA RATE
1605-1618
10.1615/TelecomRadEng.v77.i18.30
Vibhav Kumar
Sachan
Department of Electronics and Communication Engineering, KIET Group of Institutions, Ghaziabad-Meerut Highway, NH-58, Ghaziabad, Uttar Pradesh 201206, India
R.
Maheshwari
Department of Electronic & Communication Engineering, KIET Group of Institutions, Ghaziabad, UP, INDIA
Syed Akhtar
Imam
Department of Electronics and Communication Engineering, Faculty Of Engineering and Technology Jamia Millia Islamia, New Delhi, India
sensor network
multi-antenna systems (MIMO)
multiple nodes cooperation (CMIMO)
energy analysis
In the wireless sensor networks, where nodes are working on batteries, energy expenditure smear is most important for similar throughput and BER requirements. Using various (BPSK, MQAM) modulation schemes to lower the total energy consumption including transmission and circuit energy both. For these rechargeable batteries end to end delay maintenance is also important. It will be started with the comparison between SISO and MIMO (MISO, SIMO and MIMO) for BPSK. Then by using contrasting modulation technique (MQAM) in which constellation size will vary and can optimize for huge energy saving. Then our work will widen to multi-node system in which both long-haul and local transmissions are bob up. We will show the comparison of MIMO, MISO and SIMO with traditional approach (SISO) for used energy and will see that how multi-antenna systems acquire energy savings.
SIMULATION OF THE PROCESS OF ESTIMATION OF CHANGES IN THE STATE OF WATER IN BIOLOGICAL OBJECTS IN THE MICROWAVE RANGE
1619-1629
10.1615/TelecomRadEng.v77.i18.40
Ch.
Liu
Heilongjiang Bayi Agricultural University,
5, Xinfeng Str., Daqing, 163319, China
I. N.
Bondarenko
Kharkiv National University of Radio Engineering and Electronics, 14, Nauka Ave, Kharkiv, 61166, Ukraine
O. А.
Derevyanko
Kharkiv National University of Radio Electronics, 14 Nauka Ave, Kharkiv 61166, Ukraine
O. Yu.
Panchenko
Kharkiv National University of Radio Electronics, 14 Nauka Ave, Kharkiv 61166, Ukraine
aperture
capacitance
coaxial line
boundary conditions
diffusion
bound water
electromagnetic field components
The distribution of free water and water associated with molecules of biological matter determines its state. The electrophysical properties of free and bound water are significantly different. The frequency of molecules relaxation lies in the microwave range. Therefore, microwave methods of measurement are effective. They allow you to trace the dynamics of the object under external influence. In the paper, the microwave sensor circuit is analyzed, for which it is possible to create a rigorous analytical model for monitoring the process of changes. The model contains analytical solutions to the problem of transforming the electrophysical properties of an object and the electrodynamic problem of determining information parameters at the sensor output. The results of calculations of the electromagnetic field components and the transfer function of the sensor are discussed, and the dimensions of its working area are estimated.
PHYSICAL AND MATHEMATICAL FOUNDATIONS OF MEASUREMENTS IN NONLINEAR DYNAMIC SYSTEMS
1631-1637
10.1615/TelecomRadEng.v77.i18.50
Yu. P.
Machekhin
Kharkiv National University of Radio Electronics, 14 Nauka Ave, Kharkiv 61166, Ukraine
Yu. S.
Kurskoy
Kharkiv National University of Radio Electronics, 14 Nauka Ave, Kharkiv 61166, Ukraine
A. S.
Gnatenko
Kharkiv National University of Radio Electronics, 14 Nauka Ave, Kharkiv 61166, Ukraine
nonlinearity
dynamic variable
chaotic mode
laser
nonlinear measurements
Physical and mathematical bases of measurements in physical non-linear dynamical systems are formulated. Physical properties, common to different systems, include: interval physical values; different modes of dynamics (including chaotic); strong dependence on the initial conditions; exposure to noise. We have used mathematical tools and methods of the dynamic chaos theory, open systems theory, fractal analysis: intervals of quantities values, fractal dimension, predictability time, model equation and others. New results and models are important for creating lasers with high stabilization of characteristics and practical application of solitons.
PRINCIPAL PARAMETERS FOR OPTIMIZATION OF EXPERIMENTAL TECHNIQUE FOR FAST REMOTE IDENTIFICATION OF LIQUIDS AT MICROWAVES
1639-1648
10.1615/TelecomRadEng.v77.i18.60
S. Yu.
Polevoy
O.Ya. Usikov Institute for Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine
V. A.
Michaylichenko
Kharkiv National University of Radio Electronics, 14 Nauka Ave, Kharkiv 61166, Ukraine
А. S.
Vakula
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine,12, Academician Proskura St., Kharkiv 61085, Ukraine; Kharkiv National University of Radio Electronics 14, Nauka Av, Kharkiv 61166, Ukraine
S. V.
Nedukh
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine; V. Karazin National University of Kharkiv, 4 Svobody Sq., Kharkiv 61077, Ukraine
S. I.
Tarapov
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine; Kharkiv National University of Radio Electronics 14, Nauka Av, Kharkiv 61166, Ukraine; V. Karazin National University of Kharkiv, 4 Svobody Sq., Kharkiv 61077, Ukraine
microwave range
metamaterial
planar photonic crystal
permittivity
At present, the fast remote identification of liquids in a container has a practical importance. It can be used, for example, for security systems and quality testing of drinks. However, the experimental techniques for this goals and in particular such a prospective technique as planar photonic crystal (PPC)-technique requires the optimization. In present paper the optimal operating frequency band (about 2-4 GHz) of the experimental setup based on PPC
metamaterial for remote identification of water-containing liquids in thin plastic containers has been found. The maximum thickness of the container wall at several operating frequencies has been evaluated, at which it is possible to carry out measurements with necessary accuracy during liquid identification. In order to minimize the effect of the container walls thickness on the identification results, the frequencies of about 1 GHz are recommended, while optimizing other parameters of the measuring setup. By using PPC-based setup the possibility of non-contact distinction not only pure ethyl and methyl alcohol solutions in water, but also their mixed solutions, has been demonstrated.
OPTIMUM ALGORITHM FOR ESTIMATING RADIO BRIGHTNESS IN SPATIALLY DISTRIBUTED RADIOMETER SYSTEMS
1649-1658
10.1615/TelecomRadEng.v77.i18.70
Valerii K.
Volosyuk
National Aerospace University "Kharkiv Aviation Institute", 17, Chkalova St.,
Kharkiv 61070, Ukraine
S. S.
Zhyla
National Aerospace University (Kharkiv Aviation Institute), 17 Chkalov St., Kharkiv, 61070, Ukraine
V. V.
Pavlikov
National Aerospace University "Kharkiv Aviation Institute", 17, Chkalova St.,
Kharkiv 61070, Ukraine
A. D.
Abramov
National Aerospace University (Kharkov Aviation Institute), 17, Chkalov St.,
Kharkiv, 61070, Ukraine
V. G.
Yakovlev
National Aerospace University (Kharkiv Aviation Institute), 17 Chkalov St., Kharkiv, 61070, Ukraine
remote sensing
thermal radiation
brightness
optimization
radiometer
antenna array
Optimization of the radio thermal radiation noise processing in multichannel spatially distributed radiometer systems is performed. The algorithms consideration is applicable in the aperture synthesis systems. The maximum likelihood method is implemented for calculation in the assumption that spectral brightness of radiation is constant within the frequency band of receiver, whereas the image of a radiating object depends on spatial (angular) coordinates. The peculiarities of solved tasks consists in using the spectral FV -transforms which do not require execution of the spatiotemporal band-limitedness (the quasi-monochromatic approximation) condition and make it possible to solve the problem of synthesis of algorithms for processing wideband and ultra wideband signals.
ACOUSTICAL METHOD FOR MEASURING TURBULENT STATE OF ATMOSPHERIC BOUNDARY LAYER
1659-1666
10.1615/TelecomRadEng.v77.i18.80
G. I.
Sidorov
Kharkiv National University of Radio Electronics, 14 Nauka Ave, Kharkiv 61166, Ukraine
Sergey O.
Sheiko
Kharkiv National University of Radio Electronics, 14 Nauka Ave, Kharkiv 61166, Ukraine
S.V.
Shapovalov
Kharkiv National University of Radio Electronics, 14 Nauka Ave, Kharkiv 61166, Ukraine
A. S.
Polonska
Kharkiv National University of Radio Electronics, 14 Nauka Ave, Kharkiv 61166, Ukraine
A. I.
Dmitrenko
Kharkiv National University of Radio Electronics, 14 Nauka Ave, Kharkiv 61166, Ukraine
atmospheric turbulence
acoustic waves
acoustic locator (sodar)
boundary layer of the atmosphere
A model for acoustic waves scattering by turbulent inhomogeneities in the atmospheric boundary layer is proposed and theoretically justified. The requirements for the equipment for experimental studies are given and analysis of the experimental data obtained by an acoustic locator of NURE meeting the requirements is performed. The adequacy of the theoretical model of acoustic waves scattering by turbulent inhomogeneities in the atmosphere and the possibility of classifying the state of turbulence based on the results of measurements of the envelope of echo signals have been proved experimentally.
EXPERIMENTAL ESTIMATION OF EFFICIENCY OF DISTRIBUTED ACOUSTIC RADIATOR APPLICATION IN THE SYSTEM OF RADIO ACOUSTIC SENSING OF THE ATMOSPHERE
1667-1673
10.1615/TelecomRadEng.v77.i18.90
Vladimir M.
Kartashov
Kharkov National University of Radio Engineering and Electronics, 14, Nauka Ave, Kharkiv, 61166, Ukraine
Stanislav I.
Babkin
Kharkov National University of Radio Engineering and Electronics,
14, Nauky Ave, Kharkiv, 61166, Ukraine
E. G.
Tolstykh
Kharkiv National University of Radio Engineering and Electronics, 14 Nauka Ave,
Kharkiv, 61166, Ukraine
system
radio
acoustics
sounding
atmosphere
distribution
emitter
An estimation of efficiency of the distributed acoustic radiator using in the radio acoustic sounding (RAS) system, when measuring meteorological quantities, is carried out experimentally. A good coincidence of results of the wind speed measurement performed with the comparative means (RAS and mast anemorombometer) for some averaging is shown, though the standard deviations of results of measurement carried out using the RAS system and the anemorombometer are markedly different due to methodological and technical factors. In addition, the use of the distributed emitter in the RAS system gives a real possibility of simultaneous recording of air humidity in the investigated atmosphere layer and also improves the accuracy of recording temperature profiles by using the maximum of the video pulses amplitude for calculations. The RAS system with the distributed acoustic radiator can be made in a mobile version for synchronous measurements of the main meteorological values: the speed and direction of the horizontal wind, temperature and humidity of air in the field.