Begell House Inc.
Journal of Radio Electronics
JRE
1
3
2012
APPROXIMATION OF THE SOLUTION FUNCTION FOR THE ALGORITHM OF THE NOISE-LIKE MSK SIGNAL PHASE SYNCHRONIZATION
0
E. V.
Kuzmin
FGAOU VPO Siberian Federal University, Krasnoyarsk
A quasioptimal algorithm for the spread-spectrum MSK signal phase discrimination is investigated. Choice of the solution approximation slope is justified. Results of statistical modeling are given.
BRIGHTNESS CONTRAST CONTROL: FROM TELEVISION TO COMPUTER GRAPHICS
0
A. O.
Borovkova
Volgograd State University, Chair of Forensic Inquiry
O. V.
Rvacheva
Volgograd State Medical University, Chair of Physics
A. M.
Chmutin
Volgograd State University, Chair of Forensic Inquiry
The classical algorithm of brightness contrast transformation is analyzed. Critical remarks on this algorithm are stated. A new algorithm free from these drawbacks is offered. The results of original software product application in comparison with the propitiatory product are described.
DEVELOPING NATIONAL SYSTEMS FOR COMPREHENSIVE RADIO IDENTIFICATION OF OBJECTS
0
A. V.
Bystrov
OJSC The Scientific Technical Society "National Identification Systems and Resources"
This paper proposes an approach to the development of national identification friend-or-foe systems (IFFS) for identification of special objects in the direction that has been previously non-traditional for this field. The approach is based on the comprehensive use of spatially-distributed information sources of various physical natures and the application of approaches to comprehensive information processing, based on the methods of the theories of images recognition systems and artificial intelligence systems.
INVESTIGATING SCANNING CAPACITIES OF TWO MULTIBEAM DRAGONIAN MIRROR ANTENNAS
0
A. N.
Plastikov
National Research University, Moscow Energy Institute, Chair of Antenna Devices and Radio Wave Propagation
The calculation results of two multibeam mirror antennas (MMAs), built on two types of non-classical offset parabolic mirror antennas with concave hyperbolic reflectors, are presented. Both investigated MMAs have a circular aperture with the diameter of 100 wavelengths. The directional patterns and the aperture efficiencies at different beam angles in two planes are determined to define scanning capacities. The cross polarization characteristics are investigated. The scanning capacities of the two analyzed MMAs are compared in possible versions of the radiating system elements.
MICROSTRIP COLLINEAR ANTENNA
0
M. O.
Konovalenko
Tomsk State University
Yu. I.
Buyanov
Tomsk State University
The work is devoted to studying the possibility of developing cheap and efficient external aerials for Wi-Fi networks, using printing on a film-clad dielectric in the form of collinear microstrip antennas, representing a cophased antenna array of the vibrators, located along its longitudinal axis. The operation principle and calculations methods are discussed; the factors influencing the directional properties of collinear microstrip antennas are investigated. A series-shunt network for vibrators feeding, ensuring the stable position of the directional pattern maximum in the frequency band, is proposed. The numerical modeling of the antenna showing the possibility of its practical development is made. Design versions of the Wi-Fi antenna are provided.
POWER POTENTIAL AND PERFORMANCE CAPACITIES OF USING THE PARAMETRIC DEMODULATION EFFECT FOR RADIO SIGNAL RECEPTION IN THE DEPTH OF THE SEA WATER
0
G.Ya.
Shaidurov
Siberian Federal University, Chair of Radioelectronic Systems
D. S.
Kudinov
Siberian Federal University, Chair of Radio Electronic Systems
Improved values of the depth and range evaluation of underwater radio signal reception in the seawater found by means of experimental data are presented. The use of parametric demodulation effect for underwater reception of radio signal emitted by long-wave shore station in comparison with the ultra long-wave system Sanguin (US) is described.
SCATTERING ON A STATISTICALLY IRREGULAR SURFACE WITH RANDOM CORRELATION PROPERTIES
0
V. V.
Akhiyarov
N. E. Bauman Moscow State Technical University
The solution of the problem of scattering on a statistically irregular surface using the Monte-Carlo method is discussed. An algorithm for generating an ensemble of surfaces with specified correlation properties is presented. Scattering indicatrices for surfaces with Gaussian and exponential correlation functions, as well as for a multi-scale surface, are given.
THE MODEL OF A NONLINEAR RADIATING ELECTROMAGNETIC CRYSTAL IN THE MIXING MODE
0
S. E.
Bankov
V. A. Kotelnikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow
M. D.
Duplenkova
Special Design Office, National Research University Moscow Power Engineering Institute
A radiating electromagnetic crystal, containing resistance-capacitive nonlinear two-terminal networks, is discussed. The structure is finite along one coordinate axis and infinite along the other axis, and it is excited by a free-space plane wave with low amplitude at a signal frequency. Simultaneously, the electromagnetic crystal is excited by its natural wave with high amplitude, propagating at a heterodyne frequency. Two problems of linear and nonlinear analysis are analyzed. The harmonic balance method is applied for nonlinear analysis, which produces a system of nonlinear equations in relation to the voltage amplitudes of heterodyne frequency harmonics in all elements of the crystal. The results of nonlinear problem solution are presented as time dependencies of differential conductivities and capacities of nonlinear elements. Linear analysis about excitation of the structure by a free-space plane wave is carried assuming specified differential conductivities and capacitances. The result of the linear problem solution is the loss of wave conversion at the signal frequency to the electromagnetic crystal wave at the interim frequency.