Vol 21, No 2 (2023)

Theoretical technological basis of information transmission and signals

Testing of pseudorandom signal generators based on the Lorentz system

Loginov S.S., Butkevich Y.R., Sivintseva O.A.

Abstract

This work presents results of the testing of modified pseudorandom signal generators. Two generators developed on the basis of the Lorentz system with chaotic dynamics are considered. The first generator is described by the Lorentz system implemented over a Galois field, and the second is described by the Lorentz system in which digital sequence formation occurs by periodic sampling from signal signatures. As an additional confirmation of the relevance of the results obtained, the article valuates a generator developed on the basis of the standard Matlab function for binary random sequence generating. Generator testing was carried out using a test battery developed by the National Institute of Standards and Technology, which includes 15 different tests. The results obtained are compared with the results obtained by testing reference generators. The results of this research can be applied in the development of cryptographic and data transmission systems.

Infokommunikacionnye tehnologii. 2023;21(2):7-12
pages 7-12 views

Communication networks and multi-services

5G network model development in Anylogic environment

Glushak E.V.

Abstract

This article describes the analysis of programs for modeling 5G networks. In the selected AnyLogic program, a 5G network model with several base stations that have different characteristics was created. Studies of this model have been made taking into account various disciplines of the queue, the load on each station has been calculated at different priorities. It is proved that this model can be used to study and evaluate the of data transmission efficiency in 5G networks, as well as to analyze the impact of the characteristics of additional parameters (latency, load and priorities) on the quality of data processing. The studies confirmed that the developed 5G network model can help telecom operators optimize performance of their networks and ensure more efficient use of allocated resources.

Infokommunikacionnye tehnologii. 2023;21(2):13-19
pages 13-19 views

Communication lines and fiber-optics telecommunications technologies

Study of transmission parameters and mutual influence of signal-blocking cables with current-conductive cores with increased flexibility

Popov V.B.

Abstract

In recent years, the intensive development of passenger high-speed and freight heavy traffic сreated increased demands on the organization and provision of transportation, the development and implementation of new, primarily infocommunication technical means and technologies of the track complex. Russian Railways is implementing a number of significant infrastructure projects, several of which have obtained federal status. One of the main directions of of the railway network development is its widespread electrification, development and implementation of innovative infocommunication technical means and technologies for the railway infrastructure of the track complex. During the operation of electrified railways, generted high-power electromagnetic fields posing a serious problem related to electromagnetic compatibility of equipment. Therefore, requirements are placed on the quality of cables of signaling, centralization and blocking systems of railways are rather high. The article observes the transmission parameters and mutual influence of signal-blocking cables and current-carrying cores with high-flexibility.

Infokommunikacionnye tehnologii. 2023;21(2):19-24
pages 19-24 views

Radio transmitting and receivering devices, television

Reorientation of the Earth remote sensing spacecraft using rotors

Alekseev A.V., Golushkova A.O.

Abstract

The article describes a method of reorienting of the Earth remote sensing gyrostat satellite using a flywheel engine, while located in the same vertical plane with the observation object. In the course of the study, a geometric dependence of the nutation angle on time was derived, differential equations of the motion of the spacecraft relative to the center of mass were generated and solutions were obtained. These obtained equations allows to determine motion parameters (coordinates and speeds) depending on the inertial mass characteristics of the system, initial conditions and time, as well as control the effect of these parameters on the system. The article presents the results of conducted studies that show the performance of the developed mathematical model. Thanks to the developed model, it is possible to determine the necessary control actions to target the gyrostat satellite to the observation object with high accuracy.

Infokommunikacionnye tehnologii. 2023;21(2):24-29
pages 24-29 views

Determination of the conditions for the safe approach of an inspector satellite with a spacecraft in Earth orbit

Alekseyev A.V., Efremenkova V.V.

Abstract

The article is devoted to the study of the movement of the inspector satellite in the vicinity of the observed spacecraft. The inspector satellite is developed in order to monitor the spacecraft, carry out timely maintenance in order to eliminate malfunctions for its further functioning, refueling, towing, etc. One of the most important stages of the satellite is the approach to the spacecraft, which is planned by modeling using the equations of relative orbital motion, which generation is presented in this article. The rendezvous procedure is carried out by two-pulse maneuver. The article also describes conducted numerical experiments modeling the approach under different initial conditions, in which conditions for collision and safe approach of the satellite with the spacecraft, the most convenient observation positions near the spacecraft and the time when it can be observed are determined.

Infokommunikacionnye tehnologii. 2023;21(2):29-36
pages 29-36 views

Analysis of boundary latencies in the TSN Ethernet network

Sudareva M.E., Yashin V.N.

Abstract

The article describes analysis of boundary latencies in the TSN Ethernet network using deterministic analysis, based on network calculations. Today Internet networks have successfully reduced end-to-end operational latencies to tens of milliseconds only, but modern applications require even lower latencies. It is so caslled ultrashort or edge latency (ULL), that fulfil requirements of modern applications. Latencies are very critical factor in such area as telemedicine because telesurgery needs almost real-time network connection. The article provides results of TSN Ethernet network analysis in the form of a graph.

Infokommunikacionnye tehnologii. 2023;21(2):37-43
pages 37-43 views

New information technologies

Application of modern computer vision algorithms to manage with the counting of image objects

Algashev G.A., Soldatova O.P.

Abstract

This article is devoted to the research of convolutional neural network architectures in counting objects in an image. Currently, methods using regression are gaining popularity. In this article in order to solve an object counting task using regression method, modifications of the reference convolutional neural networks AlexNet, VGG16, and ResNet 50, which were developed for image classification, were used. Modification presented by replacing the second part of the neural network, which classifies images, with one fully connected layer, consisting of one neuron without activating function. In experiments, modified architectures of the reference convolutional networks were initialized as folows: using random initialization of the weights and using pretrainedined weights trained on the ImageNet dataset. The results of experiments, which confirm the performance of the proposed models and the use of the neuroplasticity method to solve the problem using regression are preented. The database of images of bacterial cells was used as training and testing material.

Infokommunikacionnye tehnologii. 2023;21(2):43-52
pages 43-52 views

Iterative adaptation algorithms in multicriteria tasks

Belger I.S., Soldatova O.P.

Abstract

This article examines using of iterative adaptation algorithms to solve the problem of determining measurement location of the carotid artery intima-media complex. The formulation of a multi-criteria decision-making problem, as the basis for determining correct criterion for proper selection and successful recognizing of the required object in an ultrasound image. The work discusses principles of constructing cascade classifiers as well as, the use of the cascade Haar classifier and the cascade LBP classifier, for which Haar primitives and local binary templates are used as a basis. The results of experimental studies in order to determine effectivity of different boosting algorithms to solve this problem are presented. The best results were shown by the Haar cascade classifier, developed using an iterative adaptation algorithm, which manages solving a multicriteria problem on a given training set more successfully and determines the most suitable areas for measuring the thickness of the common carotid artery intimate media complex.

Infokommunikacionnye tehnologii. 2023;21(2):52-58
pages 52-58 views

Use of artifical intelligence models in acceptance tests

Tarasov A.A., Lyozina I.V.

Abstract

This paper describes the application of fuzzy perсeptron in acceptance testing problems. A study on the use of various fuzzy functions in solving the problem of approximation of probability densities was carried out. Experiments were conducted on time series with preset distribution laws, evaluating approximation quality using standard deviation in the series of 29 tests. As a result of the research, using Gaussian fuzzy function, the mean value of standard deviation equal to 0.00145 determined which confirms good approximative ability of the fuzzy perсeptron. The system was tested on the acceptance test data of the gas compressor engine. In this case, approximation quality was assessed using the Kolmogorov-Smirnov agreement criterion. Analysis results confirm the high approximative ability of the fuzzy perсeptron, emphasizing its applicability in real acceptance tests.

Infokommunikacionnye tehnologii. 2023;21(2):58-64
pages 58-64 views

Selection and justification of the location of cameras of the all-round vision system on an unmanned dump truck

Syrkin I.S., Dubinkin D.M., Sadovets V.Y.

Abstract

The choice of equipment installation location on the sides of an unmanned vehicle, and especially such a dump truck, is a difficult task, which is solved, as a rule, intuitively and by the method of full-scale modeling. The authors of the article have solved the formulated problem, on substantiation of the choice of places of sensorics arrangement on the dump truck, using the developed specialized software application. The Carla simulator was chosen as a tool for carrying out the research as it has wide possibilities of visualization of the surrounding world. At the initial stage of selecting the location of the camera arrangement, the requirements for their viewing angles and the quality of the image obtained from them were formulated. This required the development of a software application in the Python language using the Open3D library, the choice of which is justified by the fact that the Carla simulator provides access to its API through a library for this language, and also because it allows rapid prototyping of applications. The developed software application helps the user to select the location of the video cameras on the dump truck in order to experience the unmanned control system. Further research is aimed at automating the selection of camera locations on board an unmanned dump truck.

Infokommunikacionnye tehnologii. 2023;21(2):64-71
pages 64-71 views

Radio telecommunication, radiobroadcasting and television technologies

Implementation of distributed computing system for simulating of the radio communication processes

Grafkin A.V., Tsvetov V.P., Lukanov A.S.

Abstract

Today, the most important component of the mathematical modeling method, which is effectively used to solve modern application problems, is modern information technology, which allows not only to accumulate practically unlimited amounts of experimental information, but also to analyze this data using visualization methods. The article discusses issues related to the development and implementation of a distributed computing system that makes it possible to simulate and analyze multiple experiments for data transmission in the case of using multi-frequency communication sys-tems. Signal models with maximum entropy are used as message source models. As a model of a communication channel with noise, a channel with additive Gaussian noise which has a uniform spectrum in a given frequency band is used. The implemented computing system allows tabular and visual analysis of such parameters of the multiple experiments as the number of signal subcarriers, the range of time interval for signal restoration, the signal-to-noise ratio, the quadrature and in-phase components of the QAM signal, the energy and information characteristics of the signal and the speed of data transmission of the communication channel. The results of the serial experiments are illustrated in form of interactive graphs with animated effects.

Infokommunikacionnye tehnologii. 2023;21(2):71-84
pages 71-84 views

Electromagnetic compatibility and equipment safety

The impact of pre-cryptographic coding messages on its detectability in steganographic systems

Shamshaev M.Y., Shakurskiy M.V.

Abstract

The usual problem of steganography is to mask an important message in a covering object that is of no interest to the attacker. In this case, attention is paid to protection from detection of the very fact of the message embedding a, since if an attacker suspects the presence of a hidden message in the transmitted information object, he can destroy the message. By the way no attention is paid to reading tolerance in steganography, since it is believed that this issue is solved by preliminary crypto-graphic encryption of the message. However, such encryption affects statistical parameters of the message, which plays an important role in the steganographic system formation. The artiсle is devoted to the analysis of the influence of cryptographic coding on the potential detectability of the message after steganographic masking. The results of the study on the influence of crypto-graphic coding on the transmitted data distribution values when using the «Kuznyechik» cipher are presented.

Infokommunikacionnye tehnologii. 2023;21(2):84-89
pages 84-89 views

Engineers management and training for telecommunications

Research and implementation of end-to-end technologies into the educational system of the university

Malina A.B., Tarutin N.A.

Abstract

This article explores and develops innovative approaches to integrating end-to-end technologies into education. End-to-end technologies are fundamentally new technological solutions that permeate all aspects of the educational process, combining curricula, teaching methods and assessment of results together. The purpose of this article is to study and adapt end-to-end technologies in order to increase the effectiveness of education, improve the availability of educational resources, and develop critical thinking and creative skills of students. The article will analyze existing end-to-end technologies and identify the most promising approaches for implementation in the educational process. Practical tools and techniques will be developed based on the use of end-to-end technologies that can be applied in educational institutions at various levels. As part of the study, the authors also pay attention to the aspect of training teaching staff to use end-to-end technologies. It is noted that the integration of these technologies, in addition to technical, also requires pedagogical training.

Infokommunikacionnye tehnologii. 2023;21(2):89-95
pages 89-95 views

Mobile teacher: advantages and disadvantages in education

Romanenko O.V., Studyannikova M.A.

Abstract

The article considers the phenomenon of «mobile teacher» as one of the most modern educational tools actively used by teachers and students in the process of studying disciplines. The paper describes the concept of «mobile teacher», «mobile education» of domestic and foreign researchers from a didactic and technological point of view. The article contains a formulation on the need and importance of introducing mobile technologies, «mobile teacher» in particular, taken from the Federal draft «State Program of the Russian Federation «Development of Education» for 2018-2025» and approved by Decree of the Government of the Russian Federation dated December 26, 2017 No. 1642. The paper presents the advantages and disadvantages of using the mobile teacher platform; identifies the difficulties that arise for students and their teachers when adapting this platform in the educational process.

Infokommunikacionnye tehnologii. 2023;21(2):95-100
pages 95-100 views

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