Begell House Inc.
Telecommunications and Radio Engineering
TRE
0040-2508
51
6-7
1997
Frequency -and-Angular Sounding of the Ionosphere
1-6
10.1615/TelecomRadEng.v51.i6-7.10
Vladimir G.
Galushko
Institute of Radio Astronomy, National Academy of Sciences of Ukraine
A method for ionospheric sounding in the frequency and angular domain is suggested. The method involves frequency dependent angles of arrival of probe signals measured for oblique radio paths as the primary data. The potential of the technique in recovering the ionospheric electron density profile is analyzed numerically. Results of sounding the ionospheric plasma in the technique suggested are presented.
Heat Regime Maintenance in Electronic Computer Means at Earlier Stages of Designing
7-11
10.1615/TelecomRadEng.v51.i6-7.20
V. I.
Azarenkov
Among the problems of designing the devices of electronic computer means (ECM), the optimization of the location of heat sources (microcircuits, radioelements, sub-units, and units) is of special interest. It is impossible to maintain high reliability under the conditions of minimizing mass, volume, expenses without taking into account the heat regime of each source. Therefore the development of technical and computer methods and algorithms for solving problems of optimum location of heat sources within the volume of the heated zone is the main task for a designer of contemporary technical systems.
This type of problems relates to the inverse problems of thermoconductance, to optimizing the multi-linked systems with the distributed parameters. They are rather complicated and little studied. The analysis of home and foreign literature indicates the availability of unused mathematical and algorithmical approaches to solving the problems of optimum location of heat sources as well as the absence of the tolerable mathematical apparatus for solving such problems with the help of computers.
Size Effect of the Reference and Current Images upon Operation of Maximum-Correlation Air Navigation Systems
12-14
10.1615/TelecomRadEng.v51.i6-7.30
A. M.
Gritchanyuk
V. N.
Bykov
Kharkov National University of Radio Engineering and Electronics, 14, Lenin Ave, Kharkov, 61166; and Joint Research Institute for the Armed Forces, OJSC Saturn Research and Production Association, Kyiv, Ukraine
Among the ways to improve the accuracy of independent air navigation systems one is employment, along with the basic inertial navigation system, of auxiliary radio (radar or radiometer based) or optical maximum-correlation, terrain-aided navigation systems. This allows minimizing the errors in aircraft coordinates as determined by the inertial system [1]. The operation principle of the maximum-correlation navigation systems consists in the following. The system sensor surveys the underlying surface at a given point of the route, while the receive facility forms a current image of the observed landmarks. The navigation computer compares the current image with the reference one stored in the computer memory. As a result of the comparison according to the maximum cross-correlation criterion, the computer estimates the aircraft to landmark conjunction errors in range and lateral deviation.
Modeling and Analysis of Radio Signal Reflection from Underdense Meteor Trails
15-21
10.1615/TelecomRadEng.v51.i6-7.40
R. Z.
Grinshpun
The amplitude-time pattern of the scattered signals is a characteristic of major importance in the radar studies of ionized meteor trails. By analyzing the curves it proves possible to estimate the meteor velocity and the ambipolar diffusion coefficient, thus determining the approximate height where the meteor trail has originated [1]. In practice this is only purpose of monostatic meteor detection radars. Meanwhile, the amplitude-time pattern contains indirect information on physical characteristics of the meteoroid, in particular, on its structural stability. Analysis of this information should not only allow estimating the mineralogical density of the meteor body, but making reasonable conclusions on the origin of the meteor particle through the use of structural models of the possible parent bodies (comet or asteroid nuclei).
Increasing the Speed of Maximum Correlation Air Navigation Systems
22-24
10.1615/TelecomRadEng.v51.i6-7.50
M. G.
Shokhin
Kharkov Military University, Ukraine
T. V.
Bykova
One of the basic requirements to maximum correlation air navigation systems (MCANS) is the ability to real-time precision measurements of ground-based object coordinates that are to be performed by the fast operation equipment on the board.
The operation of MCANS is based on forming a current image (CI) for the object to be recognized and comparising it with the reference image (RI) stored in the memory of a dedicated inboard computer (DC).
Based on the result of comparison, a decision is made whether the object belongs to any category of specified objects of recognition, whereupon the control system generates a command to correct an aircraft trajectory.
A characteristic feature of MCANS is the stringent temporal limitation of the object visualization process for navigation purposes.
The navigation systems should possess the capability of distinguishing orientation aids against complex backgrounds round the clock and under all climatic conditions and be characterized by precision and noise immunity. Fulfillment of the set of complex and contradictory requirements to MCANS has become possible through the use of informative infrared (IR), radar- and radiometer-based (RM) millimeter-wave (MMW) navigation systems, as well as hybrids of these. This suggests a necessity of quickly operating with large data arrays.
A Digital Correlation System for Preliminary Signal Processing in Multiplexed Frequency Bands
25-27
10.1615/TelecomRadEng.v51.i6-7.60
V. N.
Frankov
G. Y.
Osokin
O. V.
Gavrentiuk
A. I.
Samokhvalov
The great variety of electromagnetic radiation sources and systems operating in multiplexed frequency bands put in the forefront the problem of unifying the data processing devices. In particular this concerns correlation systems for preliminary signal processing, which could be used for detecting multicomponent signals. Both wide band signals and finite sets of narrow band signals can be treated as multicomponent.
Applicability of Adaptive Algorithms to Radar Target Identification
28-32
10.1615/TelecomRadEng.v51.i6-7.70
V. E.
Kudryashov
I. Kozhedub Kharkiv National Air Force University, 77/79 Sumska St., Kharkiv 61023, Ukraine
V. S.
Nakonechny
A. A.
Poberezhny
As is known [1, 2], the radar target identification algorithms for single-stage decision strategy are classified according to the involvement of the statistics of measured features and disturbance. The highest values of the correct identification probability (CIP) are provided by parametrical and nonparametrical Bayes algorithms. Provided that the Gaussian statistics of measurement errors of uncorrelated features and that of noise are known, the correlation algorithm for radar target identification "C" can be included in the class as well. What impedes implementation of such algorithms is the lack of information on the probability density distributions of measured features and interference. The required parameters are hard to be predetermined in practice because of multitude of simultaneous targets in the radar coverage area. Among the the nonparametrical algorithms of single-stage decision strategy those heuristic which calculate distances provide the highest CIP.
On the Necessity of Allowing for Antenna Heights in the Calculation of Tropospheric Radio Wave Scattering
33-38
10.1615/TelecomRadEng.v51.i6-7.80
V. A.
Kortunov
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkov 61085, Ukraine
F. V.
Kivva
O.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkiv 61085, Ukraine
V. N.
Gorobets
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkov 61085, Ukraine
G. G.
Maikov
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkov 61085, Ukraine
Method for calculating the scattered power in the long-range tropospheric propagation (LRTP) of radio waves are briefly analyzed. It is shown that the Gordon calculation procedure which is most frequently used for the scheme of zero heights can be simply generalized for the case of antenna height zero values. According to this simplified calculation procedure that we suggest, an error does not exceed 2 dB in comparison to more accurate (but with regard to particular cases) calculation procedures.
A Measuring Complex for Automatic Evaluation of Nonlinear Distortions
39-42
10.1615/TelecomRadEng.v51.i6-7.90
E. M.
Rudy
In 1950 V.M. Wolf suggested (author certificate No. 90158TJSSR) a method for measuring nonlinear distortions in which frequency components in a narrow band are removed from the spectrum of the useful signal. At the receiving end the nonlinearity is estimated by the level of harmonics and combination frequencies detectable in the band containing no intelligence signal.
The spectra of human speech and musical instruments are characterized by a pronounced line structure, i.e. the major portion of energy is concentrated within a narrow frequency band [1]. The line spectrum signals can be used for nonlinear distortion evaluation by comparing them at the input and output of a communication channel [2]. The possibility has been implemented in a device that automatically selects of all the incoming signals those with a highly suppressed (or absent) predetermined frequency band.
Nonlinear distortions are estimated in terms of magnitudes of nonlinear products in a predetermined frequency band at the output of the communication channel (author certificate No. 1084997TJSSR). Different signals have different parts of their frequency spectra suppressed, thus nonlinear distortions can be estimated in different areas of the frequency band without distorting the signals transmitted through the communication channel.
Open End Radiation Parameters of Canted Waveguide Loaded with an Infinite Dielectric Plate
43-53
10.1615/TelecomRadEng.v51.i6-7.100
V. F.
Naumenko
A. D.
Barkov
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkov 61085, Ukraine
The interaction between edges of two parallel half-planes separated by a laterally infinite dielectric layer is considered. Analytical expressions have been derived for the radiation characteristics in free space and eigenmode amplitudes in the dielectric layer. The dependences of these characteristics upon geometric and material parameters of the structure have been studied numerically.
Mode Conversion in Diffractionally Coupled Open Resonators
54-60
10.1615/TelecomRadEng.v51.i6-7.110
P. N.
Melezhik
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkov 61085, Ukraine
A mathematical model is developed for a class of diffractionally coupled open resonators. An algorithm has been constructed for calculating the eigenfrequencies of such structures, and their variation with the system geometry analyzed in the vicinity of the Morse critical points of the dispersion relations.
Conformal Mapping Based Analysis of High-Frequency Fields in Periodic Structures
61-71
10.1615/TelecomRadEng.v51.i6-7.120
M. V.
Mil'cho
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkov 61085, Ukraine
A hybrid, numeric-analytical method is suggested for analyzing high-frequency (HF) wave fields with the use of conformal mapping. Closed form solutions (in contrast to infinite series) have been obtained for the fields, that allow to rigorously describe singularities in the vicinity of sharp edges (ribs) of metal elements. The conformal mappings are inverted numerically. The technique is presented through the simple example of calculating EM fields in periodic structures supporting in-phase oscillations.
On the Theory of the Radial-Layered Dielectrical Spheres
72-77
10.1615/TelecomRadEng.v51.i6-7.130
Yu. V.
Svichev
The problem of arbitrary monochromatic electromagnetic wave diffraction on a radial-layered dielectrical sphere is considered. The formulas of a series of physical characteristics are deduced. Numerical implementation of a solution algorithm are analyzed.
Investigation of Gyrotropic Media by Transformation-Matrix Method
78-82
10.1615/TelecomRadEng.v51.i6-7.140
K. A.
Vytovtov
Oles Gonchar Dnepropetrovsk National University
Yu. M.
Terent'yev
An analysis is performed of the behavior of a transverse harmonic wave propagating perpendicularly to the boundaries in a layered longitudinally magnetized ferrite medium. The matrix of the N -layer-period transformation-operator as well as the expressions for the operator eigenvalues and eigenvectors are written. On the basis of the matrix, a dispersion relation is obtained
Electromagnetic Wave Scattering by the System of Randomly Oriented Clusters of Spherical Particles
83-91
10.1615/TelecomRadEng.v51.i6-7.150
Victor P.
Tishkovets
Institute of Radioastronomy of NASU, 4 Chervonopraporna St., Kharkov 61002. Ukraine
Pavel
Litvinov
Institute of Radio Astronomy of NASU, 4 Chervonopraporna St., Kharkiv, 61002, Ukraine
The problem of electromagnetic scattering by a rarefied system of randomly oriented clusters of spherical particles is investigated. The scattering by the individual clusters is exactly calculated, whereas the multiple scattering in the medium is considered using approximation methods. The coherent component of the scattered radiation is found as an interference of the wave, doubly scattered between the individual scatterers of the different clusters. Examples of the calculation of the backscattering amplification phenomenon are presented.
Interaction of Charged Particles with Surface Waves at Periodically Uneven Perfectly Conducting Boundary
92-98
10.1615/TelecomRadEng.v51.i6-7.160
I. V.
Yakovenko
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkov 61085
The properties of surface electromagnetic waves arising at a periodically uneven perfectly conducting boundary are investigated. Losses of the energy of a charged particle crossing the boundary by the wave excitation are found. A possibility of the surface wave instability in their interaction with a flow of particles is predicted; an expression for the increment is obtained.
Plasma-Stark Oscillations in Semiconductor Superlattice Near the Morse Critical Point of the Dispersion Equation
99-104
10.1615/TelecomRadEng.v51.i6-7.170
S. B.
Panin
A. Usikov Institute for Radiophisics and Electronics Natonal Academy of Sciences of Ukraine 12, Academiccian Proskura St., Kharkov, 61085, Ukraine
Dispersion laws of intermode plasma-Stark potential oscillations in a superconductor superlattice have been studied without a restriction on interaction forces. It is shown that in the spectral problem of the macroscopic theory the isolated nondegenerate Morse critical point of the dispersion equation results in the existence of hybrid intermode oscillations in its vicinity. The analysis of the dispersion equations, obtained in the Morse-point vicinities, makes it possible to draw conclusions about the character of oscillations interaction. In particular, the maximum increment of the oscillation increase was found to occur in a small vicinity of the Morse point. It is precisely that oscillations interact most intensively in this vicinity.
A Layered Metal-Insulator-Semiconductor Structure with Surface Periodicity
105-109
10.1615/TelecomRadEng.v51.i6-7.180
On the basis of the Riemann-Hilbert problem method, the present paper suggests an approach to the electrodynamical analysis of the interaction of electromagnetic wave with a plasma in a periodic metal-insulator-semiconductor (MIS) structure. In the long-wave approximation, the reflection (transmission) coefficient of a plane electromagnetic wave on a periodic MIS structure is analytically derived.
The Effective Method of Green's Function Representation in the Circular Waveguide
110-126
10.1615/TelecomRadEng.v51.i6-7.190
S. D.
Prijmenko
National Science Center "Kharkiv Institute of Physics and Technology", Kharkiv, Ukraine
Nikolai Antonovich
Khizhnyak
V. Karazin National University of Kharkov, Ukraine
Dye Laser with Increased Radiation Brightness
127-132
10.1615/TelecomRadEng.v51.i6-7.200
M. I.
Dzyubenko
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 61022, Ukraine; Kharkiv National University of Radio Electronics, 14 Nauka Ave, Kharkiv 61166, Ukraine
Analysis of some possible ways to decrease a beam divergence for flashlamp-pumped dye lasers while maintaining high-energy characteristics has been carried out. The tenfold increase of laser radiation brightness has been obtained in the course of the experiment owing to both the suppression of generation at closed beam trajectories with the Fresnel reflection at cuvette walls and the optimum choice of the dye concentration and cuvette dimensions.
Microwave Power Spectra of Stimulated Phonon Emission and Space-Time Structures in a Spin-Phonon System of Ruby Phaser
133-139
10.1615/TelecomRadEng.v51.i6-7.210
D. N.
Makovetskii
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine
A problem of forming spin-phonon autostructures has been studied experimentally and generated Poincare cross-sections of microwave power spectra (MPS) have been obtained in a ruby phonon quantum generator (phaser). Considerable narrowing of MPS and their autowave-like superslow motion have been observed under conditions of periodical pump modulation beyond the region of the phaser relaxation resonance. A theoretical interpretation of the excitation of these space-time structures in a spin-phonon system is proposed, which is based on the antiphase mechanism of the energy exchange between modes of a stimulated phonon emission in the microwave acoustic Fabry-Perot resonator.
High Luminance Lasers for Atmospheric Sounding
140-143
10.1615/TelecomRadEng.v51.i6-7.220
A. A.
Zaprudnyi
V. G.
Pletnev
A. L.
Verkhorobin
Consider the applicability of a traveling wave amplifier for enhancing power parameters of radiation, while retaining the stability and spectral line width of the source. That should allow increasing the radiation efficiency of a cavity lidar. The advantage of a traveling wave amplifier is its ability to leave the spectral and spatial characteristics of radiation practically unchanged, in contrast to other types of amplifiers. The paper presents results of experimental investigations of the source - amplifier system for various lengths of the amplifier.
Diffraction Radiation Oscillators for CW and Pulsed Operation
144-147
10.1615/TelecomRadEng.v51.i6-7.230
V. S.
Miroshnichenko
A.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
Boris Kuz'mich
Skrynnik
Senior Researcher and Head of department in the Institute of Radio Engineering and Electronics, Ukrainian National Academy of Sciences. Rewarded with the Prize of the USSR Council of Ministers.
We review the thirty-year work for the development of a diffraction radiation oscillator (DRO) of package construction in CW and pulsed operation. Data are presented for a mid-power DRO series which completely covers the wave range λ =0.8... 10mm with short-term frequency instability 10−10,and for a high-power DRO which is avalable for λ =3...8mm in self and non self-contained style. The possibility to add in the DRO performance through the expansion of the input power range is estimated. The real possibility for the development of a pulsed DRO with power output 1.3...10kW for λ =3...8mm is shown. The characteristics of a low-voltage DRO with input power less than 50W are given.
Excitation of Chaotic Oscillations in BWO by Means of Turbulent Electron Flows
148-152
10.1615/TelecomRadEng.v51.i6-7.240
V. A.
Rakityansky
V. I.
Afanas'iev
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkov 61085, Ukraine
The possibility of producing a wide scatter in longitudinal velocities of the electron flows being formed in slow-rising magnetic fields, has been experimentally investigated. Measurement results are presented for the electron velocities scatter; and the feasibility of applying these electron flows to excite noise oscillations in millimeter BWO, is shown. Possible mechanisms causing the onset and progress of complex oscillations, and the prospects of developing the present approach, are discussed.
Basic Physical Properties of Nonsinusoidal Radio Wave Interaction with Stratified Lossy Dielectrics
153-163
10.1615/TelecomRadEng.v51.i6-7.250
A. O.
Puzanov
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkov 61085, Ukraine
A mathematical model of nonsinusoidal EM wave diffraction by stratified lossy dielectric structures has been developed. A computational algorithm has been constructed to investigate numerically the physical characteristics of the diffracted fields with the use of the normal impedance technique in the frequency-domain and Discrete Fourier Transformation for transferring the solution to the time domain. General properties of the diffracted fields have been investigated for various conditions, and the suitability of video-pulses for subsurface sounding demonstrated. The restrictions on the probe pulse lengths have been established with account of specific properties of the frequency-dependent conductivities of natural media.
Application of Submillimiter Laser Equipment in Immunology Studies
164-166
10.1615/TelecomRadEng.v51.i6-7.260
V. K.
Kiseliov
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine; V.N.Karazin Kharkiv National University 4, Svobody sq., 61022, Kharkiv, Ukraine
Ye. M.
Kuleshov
A.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
Yu. Ye.
Kamenev
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkov 61085, Ukraine
V. I.
Makolinets
M.I.Sitenko Institute for pathology of vertebral column and articulations, NAMS of Ukraine
Yu. P.
Delevsky
N. A.
Zarzethkaya
Using quasi-optic apparatus and gas-discharge HCN-laser developed at the Institute for Radiophysics and Electronics of National Academy of Sciences of Ukraine primary biomedical studies on possibilities of submillimeter wave range electromagnetic radiation application in medicine, and in immunology in particular, were conducted. The data obtained in a searching experiment on spleenocytes specimens extracted from laboratory animals spleen pointed out a dose - dependent influence of non-heat intensity laser irradiation with a wave length 337 μm upon immunocompetent cells reactivity. This enables to make a conclusion about future prospects of further investigations in this direction.
Development of Microwave Moisture Meter for Free-Flowing Materials
167-170
10.1615/TelecomRadEng.v51.i6-7.270
O. Ye.
Marykivsky
V. N.
Derkach
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkov 61085
A simple measuring scheme of a moisture meter, which operates in K-band electromagnetic waves, is presented. Its block diagram, operating algorithm for the measurement data processing unit and calibration methods is described.
Contactless Millimeter Wave Band Method for Angular Deformation Control of the Intermediate Shaft of the Power-Generating Unit
171-173
10.1615/TelecomRadEng.v51.i6-7.280
B. P.
Yefimov
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkov 61085, Ukraine
A. P.
Kasyanenko
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkov 61085, Ukraine
O. N.
Sukhoruchko
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkov 61085, Ukraine
The method and the experimental setup for the angular deformation control of the intermediate shaft of the power-generating units under the effect of the load. The method is based on the comparison the millimeter wave band radiation reflected from the reflecting marks plotted on the shaft.
Radiophysical Investigation of Ordered Domains in Amorphous Semiconductors
174-180
10.1615/TelecomRadEng.v51.i6-7.290
Yu. Ye.
Gordienko
A.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine; Kharkiv National University of Radio Engineering and Electronics, 14 Nauka Ave,
Kharkiv, 61166, Ukraine
R. S.
Far
Mathematical Simulation of Diffused Element Parameters of Integrated Circuits
181-186
10.1615/TelecomRadEng.v51.i6-7.300
Mykola I.
Slipchenko
Kharkiv National University of Radio Electronics, 14, Nauky Avenue,
Kharkiv, 61166, Ukraine
V. A.
Antonova
State-owned Enterprise "Research Technological Institute for Equipment Development", 40/42, Primakov St., 61010 Kharkiv; Kharkiv National University of Radio Engineering and Electronics, 14, Lenin Ave, Kharkiv, 61166, Ukraine
Determination of the Required Thermal Sensor Resolution in Systems of Automatic Temperature Control for Evaporation-Condensation Units
187-189
10.1615/TelecomRadEng.v51.i6-7.310
Sergey V.
Denisov
Kiev National Taras Shevchenko University, Ukraine
Technique for Simulating Microwave Volume Integral Cirquits
190-193
10.1615/TelecomRadEng.v51.i6-7.320
S. N.
Romanenko
Zaporizhzhya National Technical University, 64, Zhukovsky St., Zaporizhzhya, 69063, Ukraine
L. M.
Karpukov
Zaporizhzhya National Technical University, 64, Zhukovsky St., Zaporizhzhya, 69063, Ukraine
Ellipsometry of the Two-Component Model Field from a Multielement Scatterer
194-200
10.1615/TelecomRadEng.v51.i6-7.330
G. A.
Alexeev
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine
The statistics of the elliptisity ratio and orientation of the polarization ellipse have been investigated for the field scattered by a multielement structure consisting of a set of random and a single regular reflector. It is shown that knowledge of angular dependences of these characteristics, obtainable through rotation of a linear-polarized radiation source, allows simplifying the radar target recognition.