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Regular version of the site
Of all publications in the section: 60
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Article
Kiryanov A., Lyakhov A., Khorov E. Journal of Communications Technology and Electronics. 2017. Vol. 62. No. 6. P. 694-703.
Added: Jan 24, 2018
Article
Kravchenko N., Mukhin S., Presnyakov S. Journal of Communications Technology and Electronics. 2017. Vol. 62. No. 7. P. 800-808.

Models of rectangular and axially symmetric resonator slow-wave structures, which are built using transmission matrix for determining the characteristics of the slow-wave structures in different operation modes, are investigated. Elements of the transmission matrix are determined from the results of 3D simulation with the use of the HFSS software. In the analysis of the dispersion characteristics, slow-wave structures with two microwave propagation channels are studied and simulated using a 4×4 transmission matrix.

Original Russian Text © N.P. Kravchenko, S.V. Mukhin, S.A. Presnyakov, 2017, published in Radiotekhnika i Elektronika, 2017, Vol. 62, No. 7, pp. 693–702.

The results of this study were reported at the 2nd All-Russia Conference on Problems of Microwave Electronics, Moscow Institute of Electronics and Mathematics, Higher School of Economics (National Research University), Moscow, October 26−28, 2015.

 

Added: Oct 24, 2017
Article
Tsitovich I. I., Malikova E. E. Journal of Communications Technology and Electronics. 2011. No. 12. P. 1552-1555.
Added: Dec 18, 2011
Article
Martynov G. Journal of Communications Technology and Electronics. 2016. Vol. 61. No. 6. P. 709-716.

For more than 60 years, the Anderson–Darling test is most frequently used among all Cramér–von Mises (omega-square) tests. This statistic modifies a classical empirical process defined within the [0, 1] interval by multiplying it by weighting function ψ(t) = (t(1–t))–1/2. The weighting function redistributes the test sensitivity to deviations of the distribution function of the observed stochastic quantity from a hypothetical distribution function in different its segments. However, the tests with other weighting functions may also be of interest in practice. New formulas for the eigenvalues of the Anderson–Darling statistic are proposed. The statistic “inverse” to the Anderson–Darling statistic with weighting function ψ(t) = (t(1–t))1/2 is considered. Tests with other weighting functions may also be of interest when weighted Cramér–von Mises statistics are used. The table of quantiles of statistics with weighting functions ψ(t) = tα(1–t)β, α >–1, β >–1 is presented. The quantiles are given for 36 different combinations of parameters α >–1 and β >–1. The table was calculated using accurate numerical methods and without application of modeling techniques.

Added: Sep 16, 2016
Article
Tsitovich I. I., Chernushevich A. Journal of Communications Technology and Electronics. 2011. No. 12. P. 1543-1551.
Added: Dec 18, 2011
Article
Rybin P. Journal of Communications Technology and Electronics. 2016. Vol. 61. No. 12. P. 1432-1439.

This paper deals with the irregular binary low-density parity-check (LDPC) codes and two iterative low-complexity decoding algorithms. The first one is the majority error-correcting decoding algorithm, and the second one is iterative erasure-correcting decoding algorithm. The lower bounds on correcting capabilities (the guaranteed corrected error and erasure fraction respectively) of irregular LDPC code under decoding (error and erasure correcting respectively) algorithms with low-complexity were represented. These lower bounds were obtained as a result of analysis of Tanner graph representation of irregular LDPC code. The numerical results, obtained at the end of the paper for proposed lower-bounds achieved similar results for the previously known best lower-bounds for regular LDPC codes and were represented for the first time for the irregular LDPC codes.

Added: Dec 11, 2017
Article
Azov G. A., Mozgovoi Y. D., Tikhomirov S. A. et al. Journal of Communications Technology and Electronics. 2003. Vol. 48. No. 7. P. 802-807.

Dispersion characteristics are calculated and the design is described of the slowing structure with ceramic-metal supports for a high-power ultrawideband traveling-wave tube. Experimental dispersion characteristics (measured in a frequency band of one-and-a-half octaves) of two types of helical slowing structures are obtained for different heights of lateral fins of the metal support holder. Theoretical results are compared with experimental data.

Added: Feb 15, 2014
Article
Kanavets V. I., Mozgovoi Y. D., Khritkin S. Journal of Communications Technology and Electronics. 2010. Vol. 55. No. 4. P. 469-474.

Exchange interaction of electron and positron bunches is simulated using the particle-in-cell method and macroscopic electron and positron wave functions. It is shown that a periodic exchange process with low or high nonlinearity is realized during variations in the electron and positron concentrations.

Added: Feb 15, 2014
Article
Kanavets V. I., Mozgovoi Y. D., Slepkov A. I. et al. Journal of Communications Technology and Electronics. 1997. Vol. 42. No. 3. P. 314-320.
Added: Feb 26, 2014
Article
Savchenko L.V., Savchenko A.V. Journal of Communications Technology and Electronics. 2019. Vol. 64. No. 3. P. 238-244.

In this paper, we studied the phonetic approach for voice processing. A method for automatic recognition of speech signals, in which each quasistationary segment is associated with a fuzzy set of phonemes, was developed. We proposed the operation of the probabilistic triangular norm for fuzzy sets corresponding to the input frame and the nearest reference phoneme. The developed method was experimentally shown to allow a 1.5–5% reduction in the probability of erroneous recognition in comparison with known analogues.

Added: Jun 7, 2019
Article
Kreshchuk A., Zyablov V. V. Journal of Communications Technology and Electronics. 2014. Vol. 59. No. 12. P. 1489-1500.
Multiple-input multiple-output systems are communication systems employing multiple transmitting and receiving antennas. In the present study, a new generalized concatenated signal-code construction is proposed. Its inner codes are embedded Golden codes, and its outer codes are products of Reed-Solomon codes. New algorithms for decoding inner codes, outer codes, and the generalized signal-code construction itself are proposed. The decoder for space-time Golden codes makes it possible to obtain a measure of reliability for certain symbols without an increase in the number of arithmetic operations. The decoder for outer product codes removes the “floor” on the error-probability curve. In addition, the lower bounds of decoding-error probability for the product-code iterative decoders have been obtained. The error-correcting capacity of the new decoder for the generalized concatenated construction is higher than that of the currently known decoders. A computer simulation has shown the efficiency of the proposed construction and decoding algorithms.
Added: Jan 30, 2018
Article
Zhilin I., Kreshchuk A., Zyablov V. V. Journal of Communications Technology and Electronics. 2015. Vol. 60. No. 6. P. 695-706.

Generalized error-locating codes are discussed. An algorithm for calculation of the upper bound of the probability of erroneous decoding for known code parameters and the input error probability is given. Based on this algorithm, an algorithm for selection of the code parameters for a specified design and input and output error probabilities is constructed. The lower bound of the probability of erroneous decoding is given. Examples of the dependence of the probability of erroneous decoding on the input error probability are given and the behavior of the obtained curves is explained.

Added: Jan 30, 2018
Article
Savchenko V., Savchenko A. Journal of Communications Technology and Electronics. 2016. Vol. 61. No. 4. P. 430-435.

A words phonetic decoding method in automatic speech recognition is considered. The properties of Kullback–Leibler divergence are used to synthesize the estimation of the distribution of divergence between minimum speech units (e.g., single phonemes) inside a single class. It is demonstrated that the minimum variance of the intraphonemic divergence is reached when the phonetic database is tuned to the voice of a single speaker. The estimations are proven by experimental results on the recognition of vowel sounds and isolated words of Russian language.

Added: Jul 7, 2016
Article
Savchenko A., Savchenko V.V. Journal of Communications Technology and Electronics. 2016. Vol. 61. No. 4. P. 430-435.

A words phonetic decoding method in automatic speech recognition is considered. The properties of Kullback–Leibler divergence are used to synthesize the estimation of the distribution of divergence between minimum speech units (e.g., single phonemes) inside a single class. It is demonstrated that the min imum variance of the intraphonemic divergence is reached when the phonetic database is tuned to the voice of a single speaker. The estimations are proven by experimental results on the recognition of vowel sounds and isolated words of Russian language. 

Added: Apr 11, 2016
Article
Kanavets V. I., Mozgovoi Y. D., Slepkov A. I. et al. Journal of Communications Technology and Electronics. 1997. Vol. 42. No. 7. P. 797-802.
Added: Feb 25, 2014
Article
Kukharenko A. S., Yelizarov (Elizarov) A. A. Journal of Communications Technology and Electronics. 2016. Vol. 61. No. 9. P. 1015-1019.

A design of a band-stop frequency-selective surface based on a planar mushroom-shaped metamaterial with an electronically tunable stopband has been proposed and investigated. The results of numerical simulation and experimental measurements of the parameters of a finite section of the metamaterial with mounted varicaps are presented. These results illustrate the shift of the structure stopband occurring simultaneously with a change in the capacitance of the lumped elements. Frequency dependences of the inherent dielectric parameters have been obtained. They indicate the presence of negative values of the effective permittivity and effective permeability of the proposed structure and the presence of the surface impedance that significantly exceeds the free-space characteristic impedance and is frequency-tunable.

Added: Aug 29, 2016
Article
Цитович И. И., Маликова Е. Е. Радиотехника и электроника. 2011. № 12. С. 1556-1563.
Added: Dec 18, 2011
Article
Kukharenko A. S., Yelizarov (Elizarov) A. A. Journal of Communications Technology and Electronics. 2016. Vol. 61. No. 2. P. 204-210.

Methods for extension of the rejection band of microwave devices on the basis of planar modified mushroom-shaped metamaterials comprising either two-layered topological structures with frequency-selective surfaces or multilayer bulk structures with intermediate layers containing split-ring resonators are proposed. Computer simulation of such devices, clearly demonstrating a twoto six-fold extension of the rejection band is performed. Experimental results confirming the results of numerical simulation are presented.

Added: May 5, 2016
Article
Ozhegov R., Okunev O., Goltsman G. et al. Journal of Communications Technology and Electronics. 2010. Vol. 5. No. 4. P. 716-720.

The dependence of the noise equivalent temperature difference (NETD) of a superconducting integrated receiver (SIR) on the receiver noise temperature and the inputsignal level has been investigated. An unprecedented NETD of 13±2 mK has been measured at a SIR noise temperature of 200 K, intermediate-frequency bandwidth of 4 GHz, and time constant of 1 s. With a decrease in the input signal, an improvement in the NETD is observed. This effect is explained by a reduction in the influence of the instabilities of the receiver power supply and the amplification circuit that occur when the input signal is decreased.

Added: Oct 12, 2017
Article
Kanavets V. I., Mozgovoi Y. D., Khritkin S. Journal of Communications Technology and Electronics. 2014. Vol. 59. No. 8. P. 877-883.

Numerical simulation of interaction processes in the electron–positron matter (EPM) is numer ically simulated in the framework of the specific research area, gammaelectronics, which is concerned with the problem of creation and long existence of an EPM with extremely high energy, which is released in the process of delayed annihilation. Interaction processes in the EPM are studied by the methods of the classical largeparticle model and a quantum model using macroscopic wave functions of electrons and positrons. In contrast to the point kinematic approach used in quantum electrodynamics, large particles are considered as deformed bunches of charge.

Added: Feb 14, 2015
Article
Rybin P., Ivanov F. Journal of Communications Technology and Electronics. 2018. Vol. 63. No. 12. P. 1518-1523.

The error exponent of the regular graph-based binary low-density parity-check (LDPC) codes under the maximum likelihood (ML) decoding algorithm in the binary symmetric channel (BSC) is analyzed. Unlike most other papers where error exponents are considered for the case when the length of LDPC codes tends to infinity (asymptotic analysis), the finite length case (finite length analysis) is considered. In this paper, a method of deriving the lower bound on the error exponent for a regular graph-based LDPC code with finite length under ML decoding is described. Also we analyze Dependences of the error exponent on various LDPC code parameters are also analyzed. The numerical results obtained for the considered lower bound are represented and analyzed at the end of the paper.

Added: Mar 1, 2019