Journal of Radio Electronics最新文献_第9页

INTRODUCTION TO STATISTICAL MODULATION THEORY 统计调制理论导论

Journal of Radio Electronics Pub Date : 2023-06-01 DOI: 10.30898/1684-1719.2023.6.1

Y. Veshkurtsev

{"title":"INTRODUCTION TO STATISTICAL MODULATION THEORY","authors":"Y. Veshkurtsev","doi":"10.30898/1684-1719.2023.6.1","DOIUrl":"https://doi.org/10.30898/1684-1719.2023.6.1","url":null,"abstract":"Using new knowledge and models of known signals with amplitude shift keying (ASK), build a statistical theory of designing promising modems for information and control systems. The statistical theory is based on the characteristic function of A. Lyapunov of a random signal. It is proposed to consider the characteristic function of a non-deterministic signal with ASK, which simultaneously with the amplitude of the oscillation is modulated by a telegraph message. Taking into account this phenomenon, it was decided to further investigate the ASK signal from the standpoint of the so-called statistical shift keying (SSK), since the advantages of the new modulation method according to the forecast will significantly increase the performance of the proposed modem. The old demodulator is removed in the ASK modem and a patented demodulator is installed for receiving SSK signals using estimates of the real and imaginary parts of the Lyapunov characteristic function. The analysis of the energy performance and noise immunity of the modernized modem is made. As a result of the use of the first discovered property of the Lyapunov characteristic function, the noise immunity of a digital system with amplitude shift keying is increased by ten orders of magnitude by including a promising modem in its composition, and an energy gain of 10 dB compared to QPSK or 13 dB compared to ASK is obtained. Practical relevance: Replacing old ASK signal modems with new SSK signal modems will increase the quality of digital systems many times and make them competitive with other systems, including QPSK digital systems.","PeriodicalId":391686,"journal":{"name":"Journal of Radio Electronics","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123919025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Generalized impedance method for calculation reflection and passage of waves through multi-layer structure. Part 4. Criterion of applicability of stepped approximation of nonuniform medium 计算波在多层结构中的反射和通过的广义阻抗法。第4部分。非均匀介质阶跃逼近的适用性准则

Journal of Radio Electronics Pub Date : 2023-05-01 DOI: 10.30898/1684-1719.2023.5.5

I. Antonets, V. Shavrov, V. Shcheglov

{"title":"Generalized impedance method for calculation reflection and passage of waves through multi-layer structure. Part 4. Criterion of applicability of stepped approximation of nonuniform medium","authors":"I. Antonets, V. Shavrov, V. Shcheglov","doi":"10.30898/1684-1719.2023.5.5","DOIUrl":"https://doi.org/10.30898/1684-1719.2023.5.5","url":null,"abstract":"The correctness of applicability of stepped approximation for calculation the reflection, propagation and dissipation coefficients by falling the wave to multi-layer structure is investigated. The starting distribution is the linear increasing of wave number from initial to final points of structure. As an approach it is employed the presentation of structure as a combination from layers in each if it’s the wave number is constant but from one layer to other increases by stepped manner. It is formed 12 distributions with increasing fractional of distribution of structure to steps. It is shown that the dependence of reflection coefficient from the fractional distribution of structure with constant of its length has powerfully indented resonance character. It is shown that for expulsion the possibility of resonances excitation the half of minimum wave length must be more then whole length of structure. From this demand it is found the critical as so maximum value of wave number which is equal to ratio of number “pi” to the whole length of structure. It is found that the correct approximation of linear increasing by stepped is the so as which maximum of wave number is less than critical. It is found that in practice near the critical value for the achieve the correction (near 5%) it is enough the distribution of structure on seven steps which have equal high and length. When the maximum of wave number is more than critical number the anyone increasing of distribution (so as increasing of steps quantity) for increasing of approximation precision of linear structure by stepped does not achieved.","PeriodicalId":391686,"journal":{"name":"Journal of Radio Electronics","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133405622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

TECHNIQUE AND TOOLS FOR INVESTIGATION OF CONDUCTIVE INTERFERENCE FROM ELECTRICITY CONVERTERS UNDER OPERATING CONDITIONS 工作条件下电变流器导电干扰研究的技术和工具

Journal of Radio Electronics Pub Date : 2023-05-01 DOI: 10.30898/1684-1719.2023.5.8

Z. Gizatullin, R. Gizatullin, R. Mubarakov

{"title":"TECHNIQUE AND TOOLS FOR INVESTIGATION OF CONDUCTIVE INTERFERENCE FROM ELECTRICITY CONVERTERS UNDER OPERATING CONDITIONS","authors":"Z. Gizatullin, R. Gizatullin, R. Mubarakov","doi":"10.30898/1684-1719.2023.5.8","DOIUrl":"https://doi.org/10.30898/1684-1719.2023.5.8","url":null,"abstract":"Electricity converters are widely used as part of technical means. They operate at high frequencies and have improved weight and dimensions. This exacerbates the problem of intrasystem electromagnetic compatibility of technical means. In this case, often, the problem of electromagnetic compatibility is manifested only in conditions of complete installation and operation. Therefore, the purpose of this work is to develop a methodology and tools for the study of conducted interference from power converters in operating conditions. A capacitive sensor has been created to measure conductive interference in the housing of the power converter and in the conductive elements of the design of technical facilities. Examples of the study of conducted interference from a pulsed power supply in the time and frequency domains are given. A circuit model for calculating the real parameters of conducted interference is proposed. An example of calculation is given. The noise amplitude reaches several tenths of a volt. A significant part of the interference energy is in the range up to 10 MHz. The dependences of the decrease in the amplitude of conducted interference on the distance to the source are presented. Interference without significant attenuation can propagate up to several meters through conductive structural elements. In this case, with increasing distance, voltage fluctuations at the leading and trailing edges of the pulses increase. The methodology and tools can be used to study possible propagation paths and parameters of conducted interference from different sources in the area of their operation. They can also be used to evaluate the effectiveness of interference mitigation measures.","PeriodicalId":391686,"journal":{"name":"Journal of Radio Electronics","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127746612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

AN APPROXIMATE ASYMPTOTIC SOLUTION FOR THE ELECTROMAGNETIC FIELD OF SOURCES NEAR A SMOOTH CONVEX CONDUCTING SURFACE OF ROTATION 旋转光滑凸导电表面附近源电磁场的近似渐近解

Journal of Radio Electronics Pub Date : 2023-05-01 DOI: 10.30898/1684-1719.2023.5.2

M. Indenbom

{"title":"AN APPROXIMATE ASYMPTOTIC SOLUTION FOR THE ELECTROMAGNETIC FIELD OF SOURCES NEAR A SMOOTH CONVEX CONDUCTING SURFACE OF ROTATION","authors":"M. Indenbom","doi":"10.30898/1684-1719.2023.5.2","DOIUrl":"https://doi.org/10.30898/1684-1719.2023.5.2","url":null,"abstract":"Approximate asymptotic solution is developed for the electromagnetic field due of a surface magnetic and electric currents located near an arbitrary smooth convex conducting surface of rotation of large size. The expressions of field are valid in a near-surface layer with a thickness of the order of the wavelength and have the form of a sum of a series of azimuthal harmonics and an integral over a continuous spectrum of eigenfunctions of the field. The coefficients of the series are expressed by integrals from the product of a given distribution of sources with eigenfunctions. For eigenfunctions, both general integral representations and closed expressions in terms of Airy functions are obtained, which are uniformly valid along surface of a rotation for the case of one pole by the parabolic equation method. The field expressions take into account the inseparability of the field by the sum in term of E- and H-type fields, are uniformly valid in the near-surface layer, excluding the vicinity of the poles of the rotation surface, and have no discontinuities on the caustics of surface rays. The expressions obtained were used to calculate the mutual admittances between two annular slots on a semi-infinite and smoothly truncated conical surface. Numerical results obtained by the proposed and rigorous methods for a semi-infinite cone were compared. It is shown that in the case of in-phase annular slots in a semi-infinite cone, the obtained asymptotic expression for mutual admittance coincides with the main term of the asymptotic of a strict solution based on the method of eigenfunctions.","PeriodicalId":391686,"journal":{"name":"Journal of Radio Electronics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129191698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Choice of ensemble of broadband noise-immune signals for satellite communication systems with multiple access 多址卫星通信系统宽带抗噪声信号集合的选择

Journal of Radio Electronics Pub Date : 2023-05-01 DOI: 10.30898/1684-1719.2023.5.3

M. Zaytsev, S. Savilkin, A. Suhov, V.I. Filatov

引用次数: 0

Study of the relationship between thermal and energy characteristics of monocrystalline solar cells 单晶太阳能电池热特性与能量特性关系的研究

Journal of Radio Electronics Pub Date : 2023-05-01 DOI: 10.30898/1684-1719.2023.5.4

A. Gavrikov, V. Sergeev, V. Smirnov

引用次数: 0

THE CONCEPT OF A TWO-CHANNEL INFRARED LIDAR FOR MONITORING GREENHOUSE GASES IN THE SURFACE LAYER OF THE ATMOSPHERE 用于监测大气表层温室气体的双通道红外激光雷达的概念

Journal of Radio Electronics Pub Date : 2023-05-01 DOI: 10.30898/1684-1719.2023.5.9

S. Yakovlev, S. Sadovnikov, N. Kravtsova

引用次数: 0

RADIO-PHYSICAL FEATURES OF RADAR REFLECTIONS FROM A CLEAR SKY IN THE MILLIMETER WAVELENGTH RANGE 晴空毫米波范围内雷达反射的无线电物理特征

Journal of Radio Electronics Pub Date : 2023-05-01 DOI: 10.30898/1684-1719.2023.5.1

K. Kulikovskii, V. Sterlyadkin

引用次数: 0

Non-stationary vibrations in the system of two connected oscillators in conditions of cubic nonlinearity and cubic connection. Part 1. Multi-regime character of vibrations 三次非线性和三次连接条件下两个连接振子系统的非平稳振动。第1部分。振动的多态特性

Journal of Radio Electronics Pub Date : 2023-05-01 DOI: 10.30898/1684-1719.2023.5.6

A. Ivanov, V. Shavrov, V. Shcheglov

{"title":"Non-stationary vibrations in the system of two connected oscillators in conditions of cubic nonlinearity and cubic connection. Part 1. Multi-regime character of vibrations","authors":"A. Ivanov, V. Shavrov, V. Shcheglov","doi":"10.30898/1684-1719.2023.5.6","DOIUrl":"https://doi.org/10.30898/1684-1719.2023.5.6","url":null,"abstract":"The task about the excitation of magnetoelastic vibrations in geometry of magnetostriction transducer which contains normal magnetized ferrite plate excited by alternating magnetic field is investigated. It is proposed the model presentation of transducer in the view of two connected oscillators first of its corresponds to magnetic part of structure and the second correspond to elastic its part. The first oscillator is linear and the second is nonlinear. The nonlinearity and connection have cubic character. In dependence from the excitation level it is found five basal regimes of vibrations: №1 – synchronize, №2 – three-multiplication of frequency, №3 – chaos, №4 – gigantic oscillations, №5 – delayed stabilization. In these regimes the time-evolvent of vibrations and its parametric portraits in coordinates displacement – derivative from displacement and also frequency spectra of forced vibrations are investigated. The regimes №1б №2 are stable. The vibrations in this regimes are harmonic and complete determined. The regimes №3-№5 are non-stable. The vibrations in this regimes has chaotic or near to chaotic character. On the level of excitation the stable regimes are separated from non-stable by sharp threshold. By the overcoming of which the vibration amplitude increases by sharp jump over two-three orders. By the excitation on non-stable regimes it is established the application on the main vibrations the attendant vibrations. The frequency of attendant vibrations is higher than excitation frequency on two-three orders. The amplitude of attendant vibrations is smaller than the main vibrations amplitude more then two orders. It is proposed the model of attendant vibrations excitations. On the basis of this model the quantity appreciation of vibrations character in non-stable regimes. The recommendations for future development of investigations are proposed.","PeriodicalId":391686,"journal":{"name":"Journal of Radio Electronics","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116936745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An ultra-wideband single-polarization pyramidal metal-dielectric horn feed 一种超宽带单极化锥体金属介质喇叭馈电

Journal of Radio Electronics Pub Date : 2023-04-01 DOI: 10.30898/1684-1719.2023.4.3

V. Kaloshin, Nguyen The Thanh

引用次数: 0