Begell House Inc.
Telecommunications and Radio Engineering
TRE
0040-2508
72
9
2013
PREDICTION OF THE TROPOSPHERIC REFRACTION FACTOR IN ARBITRARY POINTS OF SPACE USING RESULTS OF MEASUREMENTS ON METEOROLOGICAL PARAMETERS IN BASE STATIONS
745-758
10.1615/TelecomRadEng.v72.i9.10
V. I.
Lutsenko
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12 Academician Proskura St., Kharkiv 61085, Ukraine
I. V.
Lutsenko
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12 Academician Proskura St., Kharkiv 61085, Ukraine
Oleg
Sytnik
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12 Academician Proskura St., Kharkiv 61085, Ukraine
N. X.
Ahn
Institute of Geophysics, Vietnam Academy of Science and Technology,
A8-18 Hoang Quoc Viet, Cau Giay, Hà Noi, Vietnam
V.N.
Gudkov
Navis − Ukraina Ltd, 20708 Smila, Ukraine
forecasting
refraction factor
navigation satellite system
troposphere correction
global navigation system
A possible way to decrease errors of location of the object coordinates is to take into account the troposphere influence while processing information in the space navigation system (SNS). Two main modes for introduction of corrections are possible: introduction in real time and after session. Both approaches are based on the calculation of troposphere delays with the use of meteorological station data on a sea level. The conclusion was drawn on the possibility of using a model zeroth order, i.e., data averaged for Ukraine. But for larger countries the use of the average data on refraction coefficient values throughout the territory will lead to unreasonably great errors. That is why the use of standard data of meteorological stations was considered for forecasting a troposphere refraction factor in the given point of space. The criteria for choice of forecast reference points are determined using similarity of atmosphere refraction coefficients and loss function values. The possibility of using the suggested approach in formation of base reference points for refraction coefficient forecasting is shown on examples of Ukraine, Russia, Great Britain and China.
INTENSITY OF SCATTERED ACOUSTIC WAVES IN THE ATMOSPHERIC BOUNDARY LAYER IN THE ABSENCE OF HEAT SOURCES ON A SURFACE
759-765
10.1615/TelecomRadEng.v72.i9.20
A. Yu.
Panchenko
Kharkiv National University of Radio Electronics, 14, Nauky Avenue,
Kharkiv, 61166, Ukraine
acoustic sounding
atmospheric boundary layer
heat sources
Processes of the atmospheric boundary layer have been estimated in the presence of atmospheric vertices.
ON SIMULATION OF LOG-PERIODIC WIRE ANTENNA WITH PULSE EXCITATION AT SHORT RANGES
767-775
10.1615/TelecomRadEng.v72.i9.30
M. A.
Omarov
Kharkov National University of Radio Engineering and Electronics, 14, Lenin Ave, Kharkov, 61166
S. N.
Selevko
Kharkiv National University of Radio Engineering and Electronics, 14, Lenin Ave, Kharkiv, 61166, Ukraine
R. I.
Tsekhmistro
Ukrainian State University of Railway Transport 7, Feierbakh Sq.,
Kharkiv, 61050, Ukraine
А. V.
Degtyarev
V. Karazin National University of Kharkiv, 4, Svoboda Sq., Kharkiv, 61022,
Ukraine
log-periodic antenna
operating frequency band
Hullen integral equation
equivalent long line
near field zone
Complementaries to the method for calculation of the spatial-temporal features of electric field intensity of logo-periodic antenna are developed for near field zone at pulse excitation.
EXCITATION OF AN ELECTROMAGNETIC FIELD PULSE IN THE MAGNETODIELECTRIC CYLINDER
777-789
10.1615/TelecomRadEng.v72.i9.40
T. M.
Ogurtsova
O.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Science of Ukraine, 12, Academician Proskura St., Kharkiv, 61085, Ukraine
Gennadiy P.
Pochanin
O.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Science of Ukraine, 12, Academician Proskura St., Kharkiv, 61085, Ukraine
Yu. B.
Sidorenko
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkov 61085, Ukraine
pulsed electromagnetic field
diffraction
magnetodielectric cylinder
The present solution is for a problem of diffraction of an electromagnetic pulse with a Gaussian envelope on the isotropic magnetohydrodynamic circular cylinder of infinite length having complex magnetic permeability. The influence of cylinder electrodynamic parameters on the amplitude-time (frequency) dependence of the magnetic strength component of the pulsed electromagnetic field induced inside the cylinder is investigated. A semiempirical estimate of the cylinder finite length influence on the general properties of the electromagnetic filed induced inside the cylinder is obtained.
INFLUENCE OF RAINS ON MICROWAVE RADAR PARAMETERS TAKING INTO ACCOUNT CUMULATIVE DISTRIBUTIONS OF RAIN RATES
791-808
10.1615/TelecomRadEng.v72.i9.50
Yu. I.
Malyshenko
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkov 61085
Yurii V.
Levadnyi
O.Ya. Usikov Institute for Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine
microwaves
radar
specific effective area of rain scattering
rain reflectivity
It is common knowledge that short-term heavy-rain effects on microwave radar parameters have a few percent against the year duration. This allows radar designers to decrease an energy potential which is intended for overcoming the rain-induced attenuation depending only on the permissible time of radar outage caused by rains typical for the region of radar positioning. The method for estimating the probability of radar uninterrupted functioning in rains is given on the example of 10, 35, 70 and 95 GHz radars including the statistical rain rate distribution for one of the Ukraine's regions. Also the specific rain attenuation and radar reflectivity dataset necessary for this method were summarized using original calculations and partially by analyzing published data. As a result, the modern computational models tested on the empirical data and complemented by the more precise original analytical dependencies are offered to the radar maintenance personnel for practical applications.
RADAR SOUNDING OF SMALL-SCALE TURBULENCE IN THE BOUNDARY LAYER OF ATMOSPHERE
809-818
10.1615/TelecomRadEng.v72.i9.60
Ye. N.
Belov
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkov 61085, Ukraine
O. A.
Voitovych
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkiv 61085, Ukraine
G. A.
Rudnev
A.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
T. A.
Tkachova
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
G. I.
Khlopov
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkiv 61085, Ukraine
Stanislav I.
Khomenko
A.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
structure constant
turbulence
spatial spectrum
fluctuations of refraction coefficient
The results of investigation of radar reflectance of optically invisible objects obtained using incoherent sounding in the range of 8 mm and 3 cm have been analyzed. Altitudinal profiles of the structure constant and its seasonal changes have been described and the presence of turbulent inhomogeneity in a spatial spectrum with a peculiar scale of 4 mm has been experimentally proved.
CLUTTER SUPPRESSION USING ADDITIVE LINEAR PREDICTION FILTERS
819-828
10.1615/TelecomRadEng.v72.i9.70
V. M.
Bezruk
Kharkiv National University of Radio Engineering and Electronics, 14, Lenin Ave, Kharkiv, 61166, Ukraine
V. A.
Tikhonov
Kharkov National University of Radio Engineering and Electronics, 14, Nauka Ave, Kharkiv, 61166, Ukraine
N.V.
Kudriavtseva
Kharkov National University of Radio Engineering and Electronics, 14, Lenin Ave, Kharkiv, 61166, Ukraine
autoregressive models
additive models
power spectrum density
clutter suppression
In the paper we propose new methods for additive autoregressive models generation. We also obtain spectral characteristics of additive processes using traditional methods and methods on the base of additive models. Furthermore, we analyze advantages of clutter suppression using the AR linear prediction filter and the lattice filter.
SIMULATION OF NONLINEAR EFFECTS OF HIGH TEMPERATURE SUPERCONDUCTING RESONATORS AND FILTERS
829-840
10.1615/TelecomRadEng.v72.i9.80
A. I.
Luchaninov
Kharkov National University of Radio Engineering and Electronics, 14, Lenin Ave, Kharkov, 61166
E.V.
Krikun
Kharkiv National University of Radio Engineering and Electronics, 14, Lenin Ave, Kharkiv, 61166, Ukraine
D. S.
Gavva
Kharkiv National University of Radio Electronics, 14 Nauka Ave., 61166,
Kharkiv, Ukraine
surface impedance
HTSC
nonlinear phenomena
selective properties of microwave devices
Surface impedance of devices made of the high temperature superconductors exhibits nonlinear properties. Nonlinear phenomena emerge in the course of such devices operation; these phenomena can cast doubt on utility of the HTSC materials application to the microwave engineering. In this connection the analysis of emerging nonlinear effects is needed even at the stage of the device designing. Nonlinear properties manifest themselves particularly strong in the structures with a high current density. The surface impedance nonlinearity results in the resonant frequency shift at the input power amplification, this, in its turn, will result in different levels of inter modulation distortions of higher harmonics on the pass band boundary.