{"title":"Modified Algorithm for Detecting Network Attacks Using the Fractal Dimension Jump Estimation Method in Online Mode","authors":"O. Sheluhin, S. Rybakov, A. Vanyushina","doi":"10.31854/1813-324x-2022-8-3-117-126","DOIUrl":"https://doi.org/10.31854/1813-324x-2022-8-3-117-126","url":null,"abstract":"The paper considers a modification of the well-known algorithm for detecting anomalies in network traffic using a real-time fractal dimension jump estimation method. The modification uses real-time thresholding to provide additional filtering of the estimated fractal network traffic dimension. The accuracy of the current estimate of the fractal dimension and the reliability of anomaly detection in network traffic in online mode is improved by adding extra filtering to the algorithm.","PeriodicalId":298883,"journal":{"name":"Proceedings of Telecommunication Universities","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127169638","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}
{"title":"Study of the Service Quality of Real Time Traffic in a Complex Interference Environment","authors":"E. Novikov, A. Sevostyanov, A. Shadrin","doi":"10.31854/1813-324x-2022-8-3-50-56","DOIUrl":"https://doi.org/10.31854/1813-324x-2022-8-3-50-56","url":null,"abstract":"The process of servicing traffic in a radio communication network in a complex interference environment is studied based on analytical and simulation modeling. A developed analytic-simulation model for servicing real-time traffic in a complex interference environment is described along with an algorithm for calculating a single-channel queuing system with an exponential time distribution between incoming requests and gamma distribution of service time in a channel.","PeriodicalId":298883,"journal":{"name":"Proceedings of Telecommunication Universities","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134296318","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}
I. Gulakov, A. Zenevich, O. Kochergina, T. Matkovskaia
{"title":"Investigation of an Information Leakage Channel in the Area of Optical Fiber Bending","authors":"I. Gulakov, A. Zenevich, O. Kochergina, T. Matkovskaia","doi":"10.31854/1813-324x-2022-8-3-44-49","DOIUrl":"https://doi.org/10.31854/1813-324x-2022-8-3-44-49","url":null,"abstract":"An information leakage channel created on the basis of fiber bending when transmitting information over an optical fiber is studied. An increase in the bending diameter of an optical fiber is shown to lead to a decrease in the power of optical radiation proceeding from it. In a bending diameter range from 5 to 20 mm, the highest radiation power was observed for the optical fiber G.655, while the lowest corresponding figure was recorded for G.657. The information leakage channel bandwidth with changed bending diameter is determined for different types of optical fiber. The bandwidth of the information leakage channel is shown to depend on the location of the photodetector used to register optical radiation taken from the bend of the optical fiber.","PeriodicalId":298883,"journal":{"name":"Proceedings of Telecommunication Universities","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114351112","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}
{"title":"Effective Channel Planning for IEEE 802.11 Networks as a Plane Tessellation Problem. Part 2. Method of Best Channel Configuration Selection and Solutions for a Low Number of Channels","authors":"A. Vikulov","doi":"10.31854/1813-324x-2022-8-3-27-36","DOIUrl":"https://doi.org/10.31854/1813-324x-2022-8-3-27-36","url":null,"abstract":"The assignation a particular channel to an access point in large, distributed IEEE 802.11 networks can present a complex challenge. Although the channel can be assigned automatically by the network controller in some cases based on specified settings, it may require human attention when this is not possible. In order to select a frequency plan, it is necessary to understand the advantages of a particular channel configuration and evaluate the resulting effects of adjacent-channel interference at the design stage. A similar problem may arise during WLAN troubleshooting. In this paper, we consider distributed flat wireless networks as regular structures in plane tessellation and propose a method for finding the best channel configurations for the most efficient channel planning of IEEE 802.11 networks, which take the specifics of spectrum use in these networks into account. In addition, we consider the simplest possible solutions for three- and four- channel frequency plans.","PeriodicalId":298883,"journal":{"name":"Proceedings of Telecommunication Universities","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116868693","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}
{"title":"Quality Analysis of Space and Space-Frequency Adaptive Signal Processing Algorithms in Satellite Navigation Systems","authors":"E. Glushankov, V. Tsarik","doi":"10.31854/1813-324x-2022-8-3-37-43","DOIUrl":"https://doi.org/10.31854/1813-324x-2022-8-3-37-43","url":null,"abstract":"The problem of interference mitigation in satellite navigation signals is considered. Construction algorithms for space- and space-frequency adaptive filters are described. The processing of real satellite signals with broadband interference by means of the constructed filters is carried out in MATLAB. As a result of comparing different processing quality indicators, the most efficient filtering algorithms are identified.","PeriodicalId":298883,"journal":{"name":"Proceedings of Telecommunication Universities","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127973319","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}
V. Alexandrov, O. Vorobyov, Y. Kazakov, L. Markova
{"title":"Dynamic Energy Losses in Switch Power Amplifiers as Part of a Hydroacoustic Transmission Path","authors":"V. Alexandrov, O. Vorobyov, Y. Kazakov, L. Markova","doi":"10.31854/1813-324x-2022-8-3-14-26","DOIUrl":"https://doi.org/10.31854/1813-324x-2022-8-3-14-26","url":null,"abstract":"Results of studies of dynamic energy losses in broadband switch amplifiers of the BD and ABD classes when operating on a hydroacoustic emitter are presented. Relative energy losses in amplifying stages based on silicon (Si) and silicon carbide (SiC) field-effect transistors are compared along with dynamic processes associated with \"transistor-diode\" through current in switching amplification circuits with Si pulsed reverse diodes and SiC Schottky diodes. The viability of using modern SiC transistors with their own reverse Schottky diodes is demonstrated. Highfrequency components of the low-pass filter current must be taken into account in order to assess the energy performance of the transmitting equipment. Recommendations on the choice of operating modes for the final stages of the switch amplification modules of hydroacoustic radiating paths are offered.","PeriodicalId":298883,"journal":{"name":"Proceedings of Telecommunication Universities","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131532284","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}
{"title":"Statistical Arithmetic Coding Algorithm Adaptive to Correlation Properties of Wavelet Transform Coefficients","authors":"S. Dvornikov, A. Ustinov, I. Okov","doi":"10.31854/1813-324x-2022-8-3-6-12","DOIUrl":"https://doi.org/10.31854/1813-324x-2022-8-3-6-12","url":null,"abstract":"It is shown that, in order to increase the compression ratio in the course of statistical arithmetic coding, it is necessary to take into account the conditional probabilities of code symbols when the preceding symbols appear. The problem of obtaining the location of the most significant symbols when encoding the current symbol is solved by calculating the autocorrelation function of the encoded symbols. An algorithm for arithmetic coding and decoding is provided, which takes into account the dependencies between the coefficients of the wavelet transform and the results of modeling its operation.","PeriodicalId":298883,"journal":{"name":"Proceedings of Telecommunication Universities","volume":"487 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133848480","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}
{"title":"The Properties of Computer Equipment Objects Evaluation to Ensure Post-Incident Audit","authors":"I. Pantiukhin","doi":"10.31854/1813-324x-2022-8-2-91-99","DOIUrl":"https://doi.org/10.31854/1813-324x-2022-8-2-91-99","url":null,"abstract":"The study of computer incidents is an important area of activity in the field of information security. The paper considers a method for describing the properties of objects of computer equipment to ensure post-incident audit. The investigation of incidents is considered by analyzing the properties of objects of volatile memory, non-volatile memory, and network traffic. These properties are presented as a set of attributes and are analyzed by applying graph theory. To solve the final problem of determining and formalizing a computer incident, various algorithms on graphs and sets of properties can be used. The paper presents a computational experiment of post-incident audit of computer equipment by the example of determining a computer incident. The presented method minimizes the amount of information processed by using only attributes for analysis.","PeriodicalId":298883,"journal":{"name":"Proceedings of Telecommunication Universities","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131307195","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}
{"title":"Block Diagram of the DRM Simulcast Trial Equipment Configuration in FM Band","authors":"S. Sokolov","doi":"10.31854/1813-324x-2022-8-2-100-107","DOIUrl":"https://doi.org/10.31854/1813-324x-2022-8-2-100-107","url":null,"abstract":"The article describes the current state of Russian radio broadcasting industry, study and implementation of block diagram of the DRM Simulcast trial equipment configuration in FM band, based on the carried out a highpower field trial of the DRM system in DRM Simulcast mode during 2019 to 2020. Recommendations for DRM digital broadcasting system implementation during the transitional period in the VHF band in the Russian Federation is presented.","PeriodicalId":298883,"journal":{"name":"Proceedings of Telecommunication Universities","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115116050","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}
{"title":"Modeling of Correlation Optical Reflectometer with a Probing Signal in the Form of Pseudo-Random Sequences Fragments","authors":"V. Khrichkov","doi":"10.31854/1813-324x-2022-8-2-108-119","DOIUrl":"https://doi.org/10.31854/1813-324x-2022-8-2-108-119","url":null,"abstract":"Traditionally, the most informative means of measuring the parameters of linear optical paths of fiberoptic communication systems is an optical time domain reflectometer with a simple probing signal. The disadvantages of such a reflectometer are known limitations on the dynamic range and resolution. To improve the listed characteristics, the paper considers the possibility of using the technology of correlation reflectometers with a probing signal in the form of fragments of pseudo-random sequences. The study carried out in this work proves the advantages of such reflectometers over traditional ones.","PeriodicalId":298883,"journal":{"name":"Proceedings of Telecommunication Universities","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126798762","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}