Begell House Inc.
Telecommunications and Radio Engineering
TRE
0040-2508
70
7
2011
SIMULATING ELEVATION ANGLE MEASUREMENTS OF LOW ALTITUDE TARGETS BY A MULTIFREQUENCY RADAR OPERATED IN THE OFF-AXIAL MODE
563-576
10.1615/TelecomRadEng.v70.i7.10
Yu. A.
Pedenko
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine,12 Academician Proskura St., Kharkov 61085, Ukraine
off-axial operating mode
multiple-frequency radar
low altitude target
multiray propagation mode
elevation angle measurements
computer simulation
The paper presents results of computer simulation of elevation angle measurements of low altitude targets over a rough sea, as performed by a triple-frequency monopulse radar operated in the off-axial measurement mode. The statistics of measurement errors have been studied in dependence on frequency diversity for a variety of sea roughness conditions and various phase differences between the 'direct' signal from the target and its specular reflection nu the interface. By increasing the number of operating frequencies of the monopulse radar from one to three it is possible to greatly reduce the errors of low-altitude elevation angle measurements in the case of off-axial operation.
DOPPLER‐POLARIMETRIC RADAR METEOROLOGICAL APPLICATIONS
577-581
10.1615/TelecomRadEng.v70.i7.20
F. J.
Yanovsky
National Aviation University, 1 Kosmonavta Komarova Ave., Kyiv 03058, Ukraine
Yuliya
Averyanova
National Aviation University, Kyiv, Ukraine
the Doppler‐polarimetric method
ground‐based and airborne radar
signal processing
This paper is an overview of Doppler - polarimetric methods and means for remote sensing of atmosphere used for detecting and predicting dangerous weather phenomena zones along the route of the airplane. In addition to such traditional phenomena as turbulence, hail, icing-inflight and thunderstorm, the approaches to distinguish areas of volcano dust is also included into consideration.
ANALYSIS OF ACCURACY OF AN AUTOMATIC INTERFERENCE COMPENSATOR IN UNSTEADY-STATE OPERATING CONDITIONS WITH ACCOUNT FOR THE MAIN OUTPUT SIGNAL
583-599
10.1615/TelecomRadEng.v70.i7.30
Yu. I.
Savvateev
E. A.
Markin
electromagnetic compatibility
information transmission systems
automatic interference compensator
Statistical dynamics of a quadrature automatic interference compensator is investigated. A complete system of stochastic differential equations of its dynamics is given. Its solution within two moments in the transition and steady-state conditions and the required and sufficient stochastic stability conditions are presented. A system of performance indicators expressed through the found moments is introduced.
ESTIMATION OF THE PROBABILITY TO DETECT SIGNALS OF WIRELESS COMMUNICATION SYSTEMS WITH WIRETAP CHANNELS WITH ANTENNAS APERTURES OF DIFFERENT SIZES AND RELATIVE POSITION
601-606
10.1615/TelecomRadEng.v70.i7.40
A. A.
Strelnitsky
Kharkiv National University of Radio Engineering and Electronics, 14, Nauka Ave, Kharkiv, 61166, Ukraine
A. E.
Strelnitskiy
Kharkov National University of Radio Engineering and Electronics,14, Lenin Ave, Kharkiv, 61166, Ukraine
A. I.
Tsopa
Kharkiv National University of Radio Engineering and Electronics, 14 Nauka Ave,
Kharkiv, 61166, Ukraine
Viktoriya M.
Shokalo
Kharkiv National University of Radio Engineering and Electronics
E.V.
Yagudina
Kharkov National University of Radio Engineering and Electronics, 14, Lenin Ave, Kharkiv, 61166, Ukraine
legitimate channel
wiretap channel
aperture
probability of
detection
system of radiators and scatterers
secret speed
The relation connecting the probability of detecting the operating of wireless digital communication systems (DCS) depending on the size of the aperture of diverting and legitimate channels and their relative position was derived. It was shown that the main factors affecting the efficiency of detection are removal of the legitimate and side channel receiving aperture from the aperture of the emitters and scatterers of the information source, as well as the value of the secret speed. Specific quantitative data on the size of apertures and diverting legitimate channels, as well as their mutual arrangement in which DCS signals can be confidently identified, were obtained.
ANALYSIS OF SPECIFIC FEATURES OF ATTENUATION OF A NONSINUSOIDAL ELECTROMAGNETIC FIELD FOR EVALUATING INFORMATION PROTECTION AGAINST LEAKAGE DUE TO SPURIOUS ELECTROMAGNETIC EMISSIONS
607-614
10.1615/TelecomRadEng.v70.i7.50
S. M.
Ivanov
State Research and Test Institute of Information Technical Protection Problems, Federal Service on Technical and Export Control, Voronezh, Russian Federation
N. A.
Korovin
State Research and Test Institute of Information Technical Protection Problems, Federal Service on Technical and Export Control, Voronezh, Russian Federation
V. A.
Mylnikov
State Research and Test Institute of Information Technical Protection Problems, Federal Service on Technical and Export Control, Voronezh, Russian Federation
I. N.
Nazarieva
State Research and Test Institute of Information Technical Protection Problems, Federal Service on Technical and Export Control, Voronezh, Russian Federation
V. I.
Tupota
State Scientific-Research Testing Institute of Problems of Technical Protection of Information, Federal Service on Technical and Export Control, Voronezh, Russian Federation
attenuation
nonsinusoidal magnetic field
spurious electromagnetic emission
leakage
pulse signal
information protection
comparative analysis
Methods for comparative evaluation of attenuation of sinusoidal and nonsinusoidal electromagnetic fields have been developed. It has been demonstrated that the relations, describing the law of attenuation of the nonsinusoidal electromagnetic field, which are used as the basis of the existing methods for evaluating information protection against leakage due to spurious electromagnetic emissions, when applied to pulse signals, can lead to substantial errors.
AUTOMATED SCANNING ESR-MICROSCOPE FOR INVESTIGATIONS ON THE MAGNETIC INHOMOGENEITY OF LOW‐PROFILE NANOSTRUCTURES
615-623
10.1615/TelecomRadEng.v70.i7.60
A. V.
Varavin
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkov 61085
G. P.
Ermak
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkiv 61085, Ukraine
M. I.
Nakhimovich
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine
I. V.
Popov
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy
of Sciences of Ukraine, 12 Academician Proskura St., Kharkiv 61085, 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
B. A.
Avramenko
National Technical University "Kharkiv Polytechnical Institute", Ukraine
A. G.
Ravlik
National Technical University "Kharkov Polytechnical Institute", Ukraine
V. N.
Samofalov
National Technical University "Kharkiv Polytechnical Institute", Ukraine
millimeter waveband
Electron Spin Resonance microscopy
magnetic nanostructure
open resonator
The design and experimental investigation of the automated scanning ESR microscope, detecting the magnetic inhomogeneity of low-profile magnets and ferromagnets by the method of the electron spin resonance (ESR) in the 30minus;45 GHz frequency band is represented. The strong static magnetic field in the specimen zone under investigation is formed using a special magnetic field concentrator. Mechanical displacement of the specimen relatively to the concentrator working gap with a minimum pitch of 1 μ;m is provided by the scanning of the static magnetic field on its surface. The first experimental data, which demonstrate the efficiency of the device operation, are presented and analyzed.
HARDWARE COMPUTING SYSTEM FOR MEASUREMENT OF LOW AND HIGH QUALITY RESONATORS CHARACTERISTICS WITHIN THE FREQUENCY BANDWIDTH FROM 26 GHZ TO 37.5 GHZ
625-647
10.1615/TelecomRadEng.v70.i7.70
V. N.
Skresanov
A.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
V. V.
Glamazdin
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura Str., 61085 Kharkiv, Ukraine
A. I.
Shubnyi
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkiv 61085, Ukraine
Z. Ye.
Eremenko
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy
of Sciences of Ukraine, 12 Academician Proskura St., Kharkiv 61085, Ukraine
microwave measurements
resonator
Q-factor
efficiency of excitation
approximation of a resonant curve
The development results of hardware computing system (HCS) for measurement of resonators characteristics with Q-factor values from dozens of units up to hundred thousand within the frequency bandwidth from 26 GHz to 37.5 GHz are provided. The measurements are based on recording and processing of amplitude-frequency characteristics (AFC) of resonators. The method for calculation of loaded Q-factor, resonant frequency, relative amplitude of oscillations and level of the constant component of the signal, as well as the shift of phases between them on factors of approximation of the resonator AFC by fractional-rational function are suggested. It is shown, how using the factors of approximation of AFC of the reflection coefficient from the resonator the eigen Q-factor and the share of signal scattering power in a coupling element can be calculated. The results of tests demonstrating the system capabilities at studying the resonators with low‐ and high‐quality factors are presented.
MEASUREMENT AND PROCESSING ALGORITHMS OF PHASE SCATTERING PATTERNS IN THE MULTICHANNEL AUTOMATED SYSTEM OF QUASIЃ]OPTICAL MICROCOMPACT RANGE
649-655
10.1615/TelecomRadEng.v70.i7.80
S. V.
Mizrakhy
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura Str., Kharkiv 61085, Ukraine
polarization scattering matrix
scale physical modeling
near millimeter band
microcompact range
automation of measurements
The results of development of the measurement and processing algorithms of phase scattering patterns in the multichannel automated system of quasi-optical polarimetric microcompact range are presented. It is used for realizing the quasi-optical waveguide modeling method. The software implemented algorithms and testing results describing the complex capabilities are provided.