1,905 research outputs found

    Intelligent OFDM telecommunication system. Part 3. Anti-eavesdropping and anti-jamming properties of system, based on many-parameter wavelet and Golay transforms

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    In this paper, we aim to investigate the superiority and practicability of many-parameter Fourier transforms (MPFT) from the physical layer security (PHY-LS) perspective. We propose novel Intelligent OFDM-telecommunication system (Intelligent-OFDM-TCS), based on MPFT. New system uses inverse MPFT for modulation at the transmitter and direct MPFT for demodulation at the receiver. The purpose of employing the MPFTs is to improve the PHY-LS of wireless transmissions against to the wide-band anti-jamming communication. Each MPFT depends on finite set of independent parameters (angles), which could be changed independently one from another. When parameters are changed, multi-parametric transform is also changed taking form of a set known (and unknown) orthogonal (or unitary) transforms. We implement the following performances as bit error rate (BER), symbol error rate (SER), the Shannon-Wyner secrecy capacity (SWSC) for novel Intelligent-MPWT-OFDM-TCS. Previous research has shown that the conventional OFDM TCS based on discrete Fourier transform (DFT) has unsatisfactory characteristics in BER, SWSC and in anti-eavesdropping communications. We study Intelligent-MPWT-OFDM-TCS to find out optimal values of angle parameters of MPFT optimized BER, SWSC, anti-eavesdropping effects. Simulation results show that the proposed Intelligent OFDM-TCS have better performances than the conventional OFDM system based on DFT against eavesdropping. Β© 2019 IOP Publishing Ltd. All rights reserved

    Many factor mimo-filters

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    Π˜ΡΡΠ»Π΅Π΄ΡƒΠ΅Ρ‚ΡΡ ΡΡ„Ρ„Π΅ΠΊΡ‚ΠΈΠ²Π½ΠΎΡΡ‚ΡŒ ΠΌΠΎΠ΄ΠΈΡ„ΠΈΡ†ΠΈΡ€ΠΎΠ²Π°Π½Π½Ρ‹Ρ… ΠΌΠ½ΠΎΠ³ΠΎΡ„Π°ΠΊΡ‚ΠΎΡ€Π½Ρ‹Ρ… (Π±ΠΈ-, Ρ‚Ρ€ΠΈ- ΠΈ Ρ‡Π΅Ρ‚Ρ‹Ρ€Π΅Ρ…-Π»Π°Ρ‚Π΅Ρ€Π°Π»ΡŒΠ½Ρ‹Ρ…) MIMO-Ρ„ΠΈΠ»ΡŒΡ‚Ρ€ΠΎΠ² для сСрых, Ρ†Π²Π΅Ρ‚Π½Ρ‹Ρ… ΠΈ Π³ΠΈΠΏΠ΅Ρ€ΡΠΏΠ΅ΠΊΡ‚Ρ€Π°Π»ΡŒΠ½Ρ‹Ρ… ΠΈΠ·ΠΎΠ±Ρ€Π°ΠΆΠ΅Π½ΠΈΠΉ. ΠžΠ±Ρ‹Ρ‡Π½Ρ‹Π΅ Π±ΠΈΠ»Π°Ρ‚Π΅Ρ€Π°Π»ΡŒΠ½Ρ‹Π΅ Ρ„ΠΈΠ»ΡŒΡ‚Ρ€Ρ‹ ΠΎΡΡƒΡ‰Π΅ΡΡ‚Π²Π»ΡΡŽΡ‚ взвСшСнноС усрСднСниС сосСдних пиксСлСй. ВСса Π²ΠΊΠ»ΡŽΡ‡Π°ΡŽΡ‚ Π΄Π²Π΅ ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½Ρ‚Ρ‹: ΠΏΡ€ΠΎΡΡ‚Ρ€Π°Π½ΡΡ‚Π²Π΅Π½Π½ΡƒΡŽ ΠΈ Ρ€Π°Π΄ΠΈΠΎΠΌΠ΅Ρ‚Ρ€ΠΈΡ‡Π΅ΡΠΊΡƒΡŽ. ΠŸΠ΅Ρ€Π²Π°Ρ ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½Ρ‚Π° ΡƒΡ‡ΠΈΡ‚Ρ‹Π²Π°Π΅Ρ‚ гСомСтричСскоС расстояниС ΠΌΠ΅ΠΆΠ΄Ρƒ Ρ†Π΅Π½Ρ‚Ρ€Π°Π»ΡŒΠ½Ρ‹ΠΌ пиксСлСм маски ΠΈ Π΅Π³ΠΎ Π»ΠΎΠΊΠ°Π»ΡŒΠ½Ρ‹ΠΌΠΈ сосСдями. Π’Ρ‚ΠΎΡ€ΠΎΠΉ ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½Ρ‚ ΡƒΡ‡ΠΈΡ‚Ρ‹Π²Π°Π΅Ρ‚ радиомСтричСскоС расстояниС ΠΌΠ΅ΠΆΠ΄Ρƒ Ρ†Π΅Π½Ρ‚Ρ€Π°Π»ΡŒΠ½Ρ‹ΠΌ пиксСлСм маски ΠΈ Π΅Π³ΠΎ Π»ΠΎΠΊΠ°Π»ΡŒΠ½Ρ‹ΠΌΠΈ сосСдями. Π’ этом классичСском Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌΠ΅ Ρ†Π΅Π½Ρ‚Ρ€Π°Π»ΡŒΠ½Ρ‹ΠΉ пиксСль маски ΠΈΠ³Ρ€Π°Π΅Ρ‚ ΠΎΠΏΡ€Π΅Π΄Π΅Π»ΡΡŽΡ‰ΡƒΡŽ Ρ€ΠΎΠ»ΡŒ Π² ΠΊΠΎΠ½Π΅Ρ‡Π½ΠΎΠΌ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Π΅ Ρ„ΠΈΠ»ΡŒΡ‚Ρ€Π°Ρ†ΠΈΠΈ. Если ΠΎΠ½ искаТСн, Ρ‚ΠΎ ΠΈ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ Ρ„ΠΈΠ»ΡŒΡ‚Ρ€Π°Ρ†ΠΈΠΈ Π±ΡƒΠ΄Π΅Ρ‚ искаТСнным. Π­Ρ‚ΠΎΡ‚ Ρ„Π°ΠΊΡ‚ опрСдСляСт ΠΏΠ΅Ρ€Π²ΡƒΡŽ ΠΌΠΎΠ΄ΠΈΡ„ΠΈΠΊΠ°Ρ†ΠΈΡŽ: Ρ†Π΅Π½Ρ‚Ρ€Π°Π»ΡŒΠ½Ρ‹ΠΉ пиксСль замСняСтся Π΅Π³ΠΎ любой сглаТСнной вСрсиСй, ΠΏΠΎΠ»ΡƒΡ‡Π΅Π½Π½ΠΎΠΉ Π½Π° основС сосСдних пиксСлСй. Вторая модификация ΠΈΡΠΏΠΎΠ»ΡŒΠ·ΡƒΠ΅Ρ‚ ΠΌΠ°Ρ‚Ρ€ΠΈΡ‡Π½ΠΎ-Π·Π½Π°Ρ‡Π½Ρ‹Π΅ вСса. Они Π²ΠΊΠ»ΡŽΡ‡Π°ΡŽΡ‚ Ρ‡Π΅Ρ‚Ρ‹Ρ€Π΅ ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½Ρ‚Ρ‹: ΠΏΡ€ΠΎΡΡ‚Ρ€Π°Π½ΡΡ‚Π²Π΅Π½Π½ΡƒΡŽ, Ρ€Π°Π΄ΠΈΠΎΠΌΠ΅Ρ‚Ρ€ΠΈΡ‡Π΅ΡΠΊΡƒΡŽ, ΠΌΠ΅ΠΆΠΊΠ°Π½Π°Π»ΡŒΠ½ΡƒΡŽ ΠΈ Ρ€Π°Π΄ΠΈΠΎΠΌΠ΅Ρ‚Ρ€ΠΈΡ‡Π΅ΡΠΊΡƒΡŽ ΠΌΠ΅ΠΆΠΊΠ°Π½Π°Π»ΡŒΠ½ΡƒΡŽ. Π§Π΅Ρ‚Π²Π΅Ρ€Ρ‚Ρ‹ΠΉ вСс ΡƒΡ‡ΠΈΡ‚Ρ‹Π²Π°Π΅Ρ‚ радиомСтричСскоС расстояниС ΠΌΠ΅ΠΆΠ΄Ρƒ Ρ†Π΅Π½Ρ‚Ρ€Π°Π»ΡŒΠ½Ρ‹ΠΌ пиксСлСм ΠΈ ΠΌΠ΅ΠΆΠΊΠ°Π½Π°Π»ΡŒΠ½Ρ‹ΠΌΠΈ сосСдними пиксСлями

    FrΓ©chet mimo-filters

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    МСдианная Ρ„ΠΈΠ»ΡŒΡ‚Ρ€Π°Ρ†ΠΈΡ ΠΏΠΎΠ»ΡƒΡ‡ΠΈΠ»Π° ΡˆΠΈΡ€ΠΎΠΊΠΎΠ΅ распространСниС ΠΏΡ€ΠΈ ΠΎΠ±Ρ€Π°Π±ΠΎΡ‚ΠΊΠ΅ скалярных ΠΈΠ·ΠΎΠ±Ρ€Π°ΠΆΠ΅Π½ΠΈΠΉ Π² качСствС ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠ² Ρ„ΠΈΠ»ΡŒΡ‚Ρ€Π°Ρ†ΠΈΠΈ, ΡΠΎΡ…Ρ€Π°Π½ΡΡŽΡ‰ΠΈΡ… ΠΏΠ΅Ρ€Π΅ΠΏΠ°Π΄Ρ‹ яркости. Главная идСя ΠΌΠ΅Π΄ΠΈΠ°Π½Π½ΠΎΠΉ Ρ„ΠΈΠ»ΡŒΡ‚Ρ€Π°Ρ†ΠΈΠΈ состоит Π² Ρ‚ΠΎΠΌ, Ρ‡Ρ‚ΠΎ Ρ†Π΅Π½Ρ‚Ρ€Π°Π»ΡŒΠ½Ρ‹ΠΉ пиксСль ΡΠΊΠ°Π½ΠΈΡ€ΡƒΡŽΡ‰Π΅ΠΉ маски замСняСтся ΠΌΠ΅Π΄ΠΈΠ°Π½ΠΎΠΉ всСх пиксСлСй, содСрТащихся Π² маскС. Π’ этой Ρ€Π°Π±ΠΎΡ‚Π΅ идСя Ρ€Π°ΡΡˆΠΈΡ€ΡΠ΅Ρ‚ΡΡ Π½Π° Π²Π΅ΠΊΡ‚ΠΎΡ€Π½ΠΎ-Π·Π½Π°Ρ‡Π½Ρ‹Π΅ изобраТСния. Π Π°ΡΡˆΠΈΡ€Π΅Π½ΠΈΠ΅ основываСтся Π½Π° Ρ‚ΠΎΠΌ Ρ„Π°ΠΊΡ‚Π΅, Ρ‡Ρ‚ΠΎ ΠΌΠ΅Π΄ΠΈΠ°Π½Π° являСтся Ρ‚Π°ΠΊΠΆΠ΅ Ρ‚ΠΎΡ‡ΠΊΠΎΠΉ, которая ΠΌΠΈΠ½ΠΈΠΌΠΈΠ·ΠΈΡ€ΡƒΠ΅Ρ‚ сумму расстояний ΠΌΠ΅ΠΆΠ΄Ρƒ Π½Π΅ΠΉ ΠΈ всСми скалярными пиксСлями Π²Π½ΡƒΡ‚Ρ€ΠΈ маски. Π’ΠΎΡ‡ΠΊΠΎΠΉ Π€Ρ€Π΅ΡˆΠ΅ ΠΊΠΎΠ½Π΅Ρ‡Π½ΠΎΠ³ΠΎ мноТСства Π²Π΅ΠΊΡ‚ΠΎΡ€Π½ΠΎ-Π·Π½Π°Ρ‡Π½Ρ‹Ρ… пиксСлСй Π² Π½Π΅ΠΊΠΎΡ‚ΠΎΡ€ΠΎΠΌ мСтричСском пространствС (с Π·Π°Π΄Π°Π½Π½ΠΎΠΉ ΠΌΠ΅Ρ‚Ρ€ΠΈΠΊΠΎΠΉ) являСтся Ρ‚Π°ΠΊΠΎΠΉ Π²Π΅ΠΊΡ‚ΠΎΡ€, сумма расстояний Π΄ΠΎ ΠΊΠΎΡ‚ΠΎΡ€ΠΎΠ³ΠΎ ΠΎΡ‚ всСх Π²Π΅ΠΊΡ‚ΠΎΡ€Π½Ρ‹Ρ… пиксСлСй (находящихся Π²Π½ΡƒΡ‚Ρ€ΠΈ маски) ΠΈΠΌΠ΅Π΅Ρ‚ минимальноС Π·Π½Π°Ρ‡Π΅Π½ΠΈΠ΅. Π’ Π΄Π°Π½Π½ΠΎΠΉ ΡΡ‚Π°Ρ‚ΡŒΠ΅ понятиС Ρ‚ΠΎΡ‡ΠΊΠΈ Π€Ρ€Π΅ΡˆΠ΅ Ρ€Π°ΡΡˆΠΈΡ€ΡΠ΅Ρ‚ΡΡ Π΄ΠΎ ΠΎΠ±ΠΎΠ±Ρ‰Π΅Π½Π½ΠΎΠΉ ΠΌΠ΅Π΄ΠΈΠ°Π½Ρ‹ Π€Ρ€Π΅ΡˆΠ΅, Π² ΠΊΠΎΡ‚ΠΎΡ€ΠΎΠΉ ΠΈΡΠΏΠΎΠ»ΡŒΠ·ΡƒΠ΅Ρ‚ΡΡ агрСгация расстояний, Π° Π½Π΅ ΠΈΡ… сумма. Π‘ΠΎΠ»Π΅Π΅ Ρ‚ΠΎΠ³ΠΎ, ΠΏΡ€ΠΈ ΠΎΠ±ΠΎΠ±Ρ‰Π΅Π½ΠΈΠΈ ΠΈΡΠΏΠΎΠ»ΡŒΠ·ΡƒΡŽΡ‚ΡΡ Π½Π΅ классичСскиС расстояния, Π° ΠΈΡ… Π°Π³Ρ€Π΅Π³Π°Ρ†ΠΈΠΎΠ½Π½Ρ‹Π΅ обобщСния. ΠžΠ±ΠΎΠ±Ρ‰Π΅Π½Π½Ρ‹Π΅ ΠΌΠ΅Π΄ΠΈΠ°Π½Ρ‹ Π€Ρ€Π΅ΡˆΠ΅ ΠΈΡΠΏΠΎΠ»ΡŒΠ·ΡƒΡŽΡ‚ΡΡ для построСния Π½ΠΎΠ²Ρ‹Ρ… ΠΌΠ΅Π΄ΠΈΠ°Π½Π½Ρ‹Ρ… MIMO-Ρ„ΠΈΠ»ΡŒΡ‚Ρ€ΠΎΠ²

    Operator method in solving non-linear equations of the Hartree-Fock type

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    The operator method is used to construct the solutions of the problem of the polaron in the strong coupling limit and of the helium atom on the basis of the Hartree-Fock equation. E0=βˆ’0.1085128052Ξ±2E_0=-0.1085128052\alpha^2 is obtained for the polaron ground-state energy. Energies for 2s- and 3s-states are also calculated. The other excited states are briefly discussed.Comment: 7 page

    Formation of High-quality Aluminum Oxide under Ion Beam Irradiation

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    In this work we used the radiation–induced technique of selective association of atoms (SAA) to create the aluminum oxide layer on the surface of metallic Al under oxygen ion beam irradiation. Optimal conditions for carrying out the radiation-induced aluminum oxidation process were established to minimize the target sputtering. An aluminum oxide layer of 20 nm thickness was obtained after irradiation of aluminum target with oxygen ions with 0.2 keV energy up to a dose of ∼2.6 β‹… 1018 ions/cm2 at room temperature. HRTEM and EELS techniques were used to characterize the chemical compositional changes after irradiation. It was found that aluminum oxide layer after irradiation contained an excessive amount (∼10 at.%) of implanted oxygen. Keywords: ion beam irradiation, aluminum thin films, EELS, HRTE

    Multiparametric wavelet transforms

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    The main goal of the paper is to show that wavelet transforms and packets have the multiparametric representation in the form of a product of the rotation Jacobi matrices. These representations we call the third and the fourth canonical multiparametric form. Each multiparametric wavelet transform (MPWT) depends on several free Jacobi parameters. When parameters are changed multiparametric transform is changed too taking form of all known and unknown orthogonal wavelet transforms. It gives unified approach to describing a wide set of cyclic orthogonal wavelet transforms and endows with adaptive properties of those transforms.Главная Ρ†Π΅Π»ΡŒ ΡΡ‚Π°Ρ‚ΡŒΠΈ β€” Π²Ρ‹Π²ΠΎΠ΄ ΠΏΡ€ΠΈΠ½Ρ†ΠΈΠΏΠΈΠ°Π»ΡŒΠ½ΠΎ Π½ΠΎΠ²ΠΎΠ³ΠΎ прСдставлСния быстрых цикличСских Π²Π΅ΠΉΠ²Π»Π΅Ρ‚-ΠΏΡ€Π΅ΠΎΠ±Ρ€Π°Π·ΠΎΠ²Π°Π½ΠΈΠΉ Π² Π²ΠΈΠ΄Π΅ произвСдСния слабозаполнСнных ΠΌΠ°Ρ‚Ρ€ΠΈΡ† вращСния, зависящих ΠΎΡ‚ ΠΊΠΎΠ½Π΅Ρ‡Π½ΠΎΠ³ΠΎ числа свободных ΠΏΠ°Ρ€Π°ΠΌΠ΅Ρ‚Ρ€ΠΎΠ². ΠŸΡ€ΠΈ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠΈ ΠΏΠ°Ρ€Π°ΠΌΠ΅Ρ‚Ρ€ΠΎΠ² мСняСтся Π²ΠΈΠ΄ прСобразования, принимая ΠΎΠ±Π»ΠΈΠΊ ΠΊΠ°ΠΊ всСх извСстных, Ρ‚Π°ΠΊ ΠΈ нСизвСстных Π² настоящСС врСмя Π²Π΅ΠΉΠ²Π»Π΅Ρ‚-ΠΏΡ€Π΅ΠΎΠ±Ρ€Π°Π·ΠΎΠ²Π°Π½ΠΈΠΉ ΠΈ Π²Π΅ΠΉΠ²Π»Π΅Ρ‚-ΠΏΠ°ΠΊΠ΅Ρ‚ΠΎΠ², Ρ‡Ρ‚ΠΎ Π΄Π°Π΅Ρ‚ ΠΏΡ€Π°ΠΊΡ‚ΠΈΡ‡Π΅ΡΠΊΡƒΡŽ основу для ΠΈΡ… ΡƒΠ½ΠΈΡ„ΠΈΡ†ΠΈΡ€ΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ описания

    Study of Convergence and Divergence of EAEU Integration Processes Based on the Gini Index

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    Regionalization and participation at the integration associations represent a typical way of national economic development. To be inside an integration process allows member states to address better their socio-economic problems and political coordination. The stability and resilience of integration associations are critical to their success. In this optic the integration associations may be subjects convergence and divergence. These phenomena may be envisaged in the income inequality of the participating countries.Aim. To study the features and prospects of the socio-economic convergence within the EEU member states, the EEU strategic contour and within the main trends of integration processes in Eurasia.Task. The tasks are following. The first one is to study the sustainability of the EEU and within its strategic contours formed by agreements on free trade zones through the convergent and divergent trends assessment. The second task is to conduct a comparative analysis of Eurasian integration to the European Union and ASEAN development.Methods. Assess the level and dynamics of income inequality among the EEU states and samples of states with which the EEU has agreements on free trade zones, which are the CIS, Serbia, Vietnam, Iran and Singapore, as well as states with which such agreements are planned to be concluded in the near future. This list of the EEU’s prospect partners includes Egypt, Israel and India, based on the Gini index, using the European Union and ASEAN as reference parameters. Use calculations to interpret the processes of convergence and divergence of various types of integration processes.Results. The estimates showed, in general, a significant interpretive potential of the interstate Gini index. The study particular results demonstrated that the EEU has a level of convergence comparable to the level of the EU before the accession of a large array of states in 2004. The level of convergence of the CIS, estimated using the Gini index, is comparable to the current level of the European Union. It was also revealed that both in the EU and in the CIS, the reduction in inequality over the selected analysis interval does not have a clear prospect. Calculations also showed the convergence of states within the EEU and its strategic contours to be sensitive to external shocks, while the convergence of ASEAN states is more directed.Conclusions. The approach used by the authors to assess the convergence of integration processes based on the calculation of the interstate Gini index explains with sufficient completeness the reasons for the successful development of the EEU and its sustainability. At the same time, the use of the interstate Gini index for the analysis of convergence and divergence of integration processes made it possible to conclude that the integration models of the states of the Global North and the Global South are diverse
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