A new method of scaling wireless sensor networks, as well as key distribution schemes and key spaces in them based on a combined combinatorial block design formed on the set of all pairs composed of blocks and corresponding to their elements dual blocks of a given combinatorial block design is presented. Estimates are given for the cardinalities of scaled circuits based on the combined projective plane, the combined modified residual block design, and the combined residual combinatorial transversal block design. It is shown that the size of the key memory of the nodes of such networks does not depend on the parameters of the combinatorial block design and is two key units, but in schemes based on the combined projective plane, the length of the shortest route between the vertices of the key matching graph increases to three. The consequences of node capture are evaluated and ways to limit them with a guaranteed security parameter are proposed. For schemes based on a combined cyclic projective plane, as applied to the w-safe WSN of a "smart home", communication schemes between nodes along routes of length from one to three and an example of a protocol are presented. An example of such a WSN containing 910 nodes that are child nodes from 31 to 91 routers is given.
{"title":"Scaling of Networks and their Key Systems Based on Combined Combinatorial Block Designs","authors":"N. Kochetova, A. Frolov","doi":"10.17587/it.29.171-182","DOIUrl":"https://doi.org/10.17587/it.29.171-182","url":null,"abstract":"A new method of scaling wireless sensor networks, as well as key distribution schemes and key spaces in them based on a combined combinatorial block design formed on the set of all pairs composed of blocks and corresponding to their elements dual blocks of a given combinatorial block design is presented. Estimates are given for the cardinalities of scaled circuits based on the combined projective plane, the combined modified residual block design, and the combined residual combinatorial transversal block design. It is shown that the size of the key memory of the nodes of such networks does not depend on the parameters of the combinatorial block design and is two key units, but in schemes based on the combined projective plane, the length of the shortest route between the vertices of the key matching graph increases to three. The consequences of node capture are evaluated and ways to limit them with a guaranteed security parameter are proposed. For schemes based on a combined cyclic projective plane, as applied to the w-safe WSN of a \"smart home\", communication schemes between nodes along routes of length from one to three and an example of a protocol are presented. An example of such a WSN containing 910 nodes that are child nodes from 31 to 91 routers is given.","PeriodicalId":37476,"journal":{"name":"Radioelektronika, Nanosistemy, Informacionnye Tehnologii","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85298984","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}
The paper is devoted to the problem of software and hardware systems acceptance testing according to the Agile Testing methodology. The Agile approach is widely used by software developers, however, developers of software and hardware solutions rarely use this approach, not believing in its effectiveness. The paper assumes that for software and hardware complexes, the practice of continuous integration should be applicable and, as a result, test interaction with hardware at the level ofphysical interfaces performs automatically. The article's authors presented Accepta, a system for automating acceptance testing of software and hardware complexes, explicitly designed for the Agile Testing methodology in the context of continuous integration. The main component of Accepta is an interface block based on the Nucleo-F767ZI debug board manufactured by ST. Test actions that run within the framework of Accepta supplement by expanding the command system of the interface block. The software part, which implements the functions of test describing and execution, is based on the Cucumber framework for automating software systems acceptance testing. The requirements for the object under test and the scenarios for checking the requirements are described in the Gherkin language, which is close to the natural description. The test script steps are described programmatically in the Ruby language. The actual execution of test actions is provided by sending commands through the COM port to the interface unit and analyzing the received responses. As the practice of using Accepta in working projects has shown, this approach allows us to successfully apply the Agile development methodology for software and hardware systems. Due to the automotive interaction with the device under the test interface, high intensity of testing in the development process, including regression, is ensured. The regular testing consequence is fast feedback: as soon as any functionality stops working correctly, developers find out about it fast. At the same time, due to the use of test automation tools, the reproducibility of test action sequences led to the detection of a defect is ensured.
{"title":"Automation of Software and Hardware Systems Acceptance Testing in the Paradigm of Behavior-Driven Development","authors":"E. Alymova, O. V. Khachkinaev","doi":"10.17587/it.29.189-196","DOIUrl":"https://doi.org/10.17587/it.29.189-196","url":null,"abstract":"The paper is devoted to the problem of software and hardware systems acceptance testing according to the Agile Testing methodology. The Agile approach is widely used by software developers, however, developers of software and hardware solutions rarely use this approach, not believing in its effectiveness. The paper assumes that for software and hardware complexes, the practice of continuous integration should be applicable and, as a result, test interaction with hardware at the level ofphysical interfaces performs automatically. The article's authors presented Accepta, a system for automating acceptance testing of software and hardware complexes, explicitly designed for the Agile Testing methodology in the context of continuous integration. The main component of Accepta is an interface block based on the Nucleo-F767ZI debug board manufactured by ST. Test actions that run within the framework of Accepta supplement by expanding the command system of the interface block. The software part, which implements the functions of test describing and execution, is based on the Cucumber framework for automating software systems acceptance testing. The requirements for the object under test and the scenarios for checking the requirements are described in the Gherkin language, which is close to the natural description. The test script steps are described programmatically in the Ruby language. The actual execution of test actions is provided by sending commands through the COM port to the interface unit and analyzing the received responses. As the practice of using Accepta in working projects has shown, this approach allows us to successfully apply the Agile development methodology for software and hardware systems. Due to the automotive interaction with the device under the test interface, high intensity of testing in the development process, including regression, is ensured. The regular testing consequence is fast feedback: as soon as any functionality stops working correctly, developers find out about it fast. At the same time, due to the use of test automation tools, the reproducibility of test action sequences led to the detection of a defect is ensured.","PeriodicalId":37476,"journal":{"name":"Radioelektronika, Nanosistemy, Informacionnye Tehnologii","volume":"IA-21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84606783","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}
The implementation of a module of a medical decision support system for diagnosing COVID-19 using chest CT images is considered. The U-Net architecture is used for segmentation of lung parenchyma and pathological areas in chest CT images, the DSC and IoU values for parenchyma are 0.951 and 0.933, for pathological areas — 0.97 and 0.959, respectively. A method for image pre-processing based on adaptive histogram equalization is described. Methods for segmentation masks postprocessing are also proposed. The first of them is necessary to separate masks into masks of the left and right lungs; it is based on the analysis of areas and mutual positions of contours. The second one is needed to eliminate artifacts. In addition to image processing methods, approaches that generate the data necessary for radiologists to make a diagnosis are also implemented (the volumes of both lungs and pathological findings in them are calculated, percentages of parenchymal tissue involvement in the pathological process are determined, the severity of the disease is assessed). The algorithms for generating a processed series of images and a DICOM SR are described. The average time spent by the module on processing one CT study containing about 600 slices, with a video memory limit of 6 GB, is 68 s, and with a limit of 8 GB — 56 s. Considering that the approximate time spent by a radiologist to process a study is about 6 minutes, the developed module can be effectively used in medical practice to reduce the burden on medical personnel.
{"title":"Development of a Module for COVID-19 Diagnostics Based on Computed Tomography Images of the Chest Based on Computer Vision Methods","authors":"A. R. Teplyakova, A. Kuznetsov","doi":"10.17587/it.29.204-214","DOIUrl":"https://doi.org/10.17587/it.29.204-214","url":null,"abstract":"The implementation of a module of a medical decision support system for diagnosing COVID-19 using chest CT images is considered. The U-Net architecture is used for segmentation of lung parenchyma and pathological areas in chest CT images, the DSC and IoU values for parenchyma are 0.951 and 0.933, for pathological areas — 0.97 and 0.959, respectively. A method for image pre-processing based on adaptive histogram equalization is described. Methods for segmentation masks postprocessing are also proposed. The first of them is necessary to separate masks into masks of the left and right lungs; it is based on the analysis of areas and mutual positions of contours. The second one is needed to eliminate artifacts. In addition to image processing methods, approaches that generate the data necessary for radiologists to make a diagnosis are also implemented (the volumes of both lungs and pathological findings in them are calculated, percentages of parenchymal tissue involvement in the pathological process are determined, the severity of the disease is assessed). The algorithms for generating a processed series of images and a DICOM SR are described. The average time spent by the module on processing one CT study containing about 600 slices, with a video memory limit of 6 GB, is 68 s, and with a limit of 8 GB — 56 s. Considering that the approximate time spent by a radiologist to process a study is about 6 minutes, the developed module can be effectively used in medical practice to reduce the burden on medical personnel.","PeriodicalId":37476,"journal":{"name":"Radioelektronika, Nanosistemy, Informacionnye Tehnologii","volume":"55 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84513400","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}
The issues of formalization of the process of multivariate structuring in digitalized organizational systems of two types are considered: multi-object and autonomous. The characterization of the process of interaction between the control center and the components of digitalized organizational systems is carried out, based on the proposed entropy estimates. The main characteristics of the stages of the process of multivariant structurization are given, optimization models are formulated for solving the main problems of these stages. The evaluation of the parameters and functions of the influence of alternative variables on the achievement of a given level of performance indicators of the organizational system is carried out. The features of using the apparatus of multivariate structuring to optimize the characteristics of a digitalized organizational system of an autonomous type are shown on the example of the organizational system of an agro-industrial enterprise.
{"title":"Formalization of the Process of Multivariate Structuring to Optimize the Functioning of Digitalized Organizational Systems","authors":"Y. Lvovich, N. A. Ryndin","doi":"10.17587/it.29.197-203","DOIUrl":"https://doi.org/10.17587/it.29.197-203","url":null,"abstract":"The issues of formalization of the process of multivariate structuring in digitalized organizational systems of two types are considered: multi-object and autonomous. The characterization of the process of interaction between the control center and the components of digitalized organizational systems is carried out, based on the proposed entropy estimates. The main characteristics of the stages of the process of multivariant structurization are given, optimization models are formulated for solving the main problems of these stages. The evaluation of the parameters and functions of the influence of alternative variables on the achievement of a given level of performance indicators of the organizational system is carried out. The features of using the apparatus of multivariate structuring to optimize the characteristics of a digitalized organizational system of an autonomous type are shown on the example of the organizational system of an agro-industrial enterprise.","PeriodicalId":37476,"journal":{"name":"Radioelektronika, Nanosistemy, Informacionnye Tehnologii","volume":"375 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80549638","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}
Cloud computing has recently emerged as a new paradigm for processing and storing large amounts of data. The rapid increase in the number of mobile phones and IoT devices benefitingfrom cloud computing services reduces the Internet bandwidth, resulting in delays in delivering data processed on remote cloud servers to the user. Mobile devices use edge computing systems (cloudlet, fog computing, etc.) to overcome resource shortages, power consumption and delays in communication channels. Edge computing systems place processing devices (cloudlets) close to users. The closer the cloudlets to mobile devices, the lower the processing time and energy consumption of the mobile device, and the higher the bandwidth of communication channels. Thus, cloudlet-based mobile computing clouds are widely used to reduce the latency in the Internet communication channels and energy consumption on mobile devices. This article identifies the most popular places for cloud servers in metropolitan mobile networks and discusses the optimal placement of a limited number of cloudlets in those places.
{"title":"Model of Optimal Placement of Cloudlets in a Wireless Metropolitan Area Network","authors":"R. Alakbarov","doi":"10.17587/it.29.182-188","DOIUrl":"https://doi.org/10.17587/it.29.182-188","url":null,"abstract":"Cloud computing has recently emerged as a new paradigm for processing and storing large amounts of data. The rapid increase in the number of mobile phones and IoT devices benefitingfrom cloud computing services reduces the Internet bandwidth, resulting in delays in delivering data processed on remote cloud servers to the user. Mobile devices use edge computing systems (cloudlet, fog computing, etc.) to overcome resource shortages, power consumption and delays in communication channels. Edge computing systems place processing devices (cloudlets) close to users. The closer the cloudlets to mobile devices, the lower the processing time and energy consumption of the mobile device, and the higher the bandwidth of communication channels. Thus, cloudlet-based mobile computing clouds are widely used to reduce the latency in the Internet communication channels and energy consumption on mobile devices. This article identifies the most popular places for cloud servers in metropolitan mobile networks and discusses the optimal placement of a limited number of cloudlets in those places.","PeriodicalId":37476,"journal":{"name":"Radioelektronika, Nanosistemy, Informacionnye Tehnologii","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87208142","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}
Pub Date : 2023-03-31DOI: 10.17725/rensit.2023.15.043
Yu. A. Groshkova, E. Buslaeva, S. V. Kraevskii, S. Gubin
Sequential synthesis of anatase modification titanium oxide nanoparticles on reduced graphene oxide in supercritical isopropanol is described. In this case, only graphene oxide was reduced to reduced graphene oxide. A one-stage method (one-pot) was also developed for the preparation of titanium oxide nanoparticles on reduced graphene oxide, where supercritical isopropanol was the graphene oxide reducing agent and the reaction medium. The resulting nanocomposites were studied using X-ray phase analysis, transmission electron microscopy, and atomic force spectroscopy methods.
{"title":"Preparation of titanium oxide nanoparticles on the surface of reduced graphene oxide in supercritical isopropanol","authors":"Yu. A. Groshkova, E. Buslaeva, S. V. Kraevskii, S. Gubin","doi":"10.17725/rensit.2023.15.043","DOIUrl":"https://doi.org/10.17725/rensit.2023.15.043","url":null,"abstract":"Sequential synthesis of anatase modification titanium oxide nanoparticles on reduced graphene oxide in supercritical isopropanol is described. In this case, only graphene oxide was reduced to reduced graphene oxide. A one-stage method (one-pot) was also developed for the preparation of titanium oxide nanoparticles on reduced graphene oxide, where supercritical isopropanol was the graphene oxide reducing agent and the reaction medium. The resulting nanocomposites were studied using X-ray phase analysis, transmission electron microscopy, and atomic force spectroscopy methods.","PeriodicalId":37476,"journal":{"name":"Radioelektronika, Nanosistemy, Informacionnye Tehnologii","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74488248","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}
Pub Date : 2023-03-31DOI: 10.17725/rensit.2023.15.051
A. E. Isaev, I. D. Kosobudsky, N. M. Ushakov, I. N. Mikhailov, M. Vasilkov
A method is presented for obtaining thin-film mesoporous coatings for protective glasses in nano- and optoelectronic devices for various purposes, including: obtaining titanium oxide sols with the addition of silver nitrate, applying coatings by the “dipcoating” method with further heat treatment. The kinetic constants of Smoluchowski's fast and slow coagulation and the activation energy of the process at various concentrations of silver nitrate were calculated. The optimal concentration of silver nanoparticles in the ash was determined by the least squares method.
{"title":"Obtaining a thin film coating composite material based on titanium dioxide and silver nanoparticles by the sol-gel method on glass substrates","authors":"A. E. Isaev, I. D. Kosobudsky, N. M. Ushakov, I. N. Mikhailov, M. Vasilkov","doi":"10.17725/rensit.2023.15.051","DOIUrl":"https://doi.org/10.17725/rensit.2023.15.051","url":null,"abstract":"A method is presented for obtaining thin-film mesoporous coatings for protective glasses in nano- and optoelectronic devices for various purposes, including: obtaining titanium oxide sols with the addition of silver nitrate, applying coatings by the “dipcoating” method with further heat treatment. The kinetic constants of Smoluchowski's fast and slow coagulation and the activation energy of the process at various concentrations of silver nitrate were calculated. The optimal concentration of silver nanoparticles in the ash was determined by the least squares method.","PeriodicalId":37476,"journal":{"name":"Radioelektronika, Nanosistemy, Informacionnye Tehnologii","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87934789","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}
Pub Date : 2023-03-31DOI: 10.17725/rensit.2023.15.003
D. Burdin, D. Chashin, N. Ekonomov, P. Zhou, Y. Qi, Tianjin Zhang, L. Panina, Y. Fetisov
The magnetoimpedance effect and the converse magnetoelectric effect in a planar heterostructure consisting of mechanically bonded layers of amorphous ferromagnet FeBSiC and piezoelectric lead zirconate titanate are studied. Magnetoimpedance was observed in the frequency range of 0.1-40 MHz and bias dc magnetic field of 0-300 Oe; the maximum magnitude of the effect at a frequency of 10 MHz reached 12%. The converse magnetoelectric effect was observed in magnetic fields of 0-50 Oe; the maximum value of the effect at the structure acoustic resonance frequency of 40 kHz was 1.45 G/(V/cm). Amplitude modulation of the magnetoimpedance by an electric field at the resonance frequency of the structure with a coefficient of ~1∙10─2 is found. Modulation occurs as a result of a combination of the piezoelectricity and magnetostriction of the layers, which leads to a change in the transverse magnetic permeability and the thickness of the skin-layer of the ferromagnet.
{"title":"Magnetoimpedance in a Planar Magnetoelectric Heterostructure Amorphous Ferromagnet–Piezoelectric: Electric Field Modulation","authors":"D. Burdin, D. Chashin, N. Ekonomov, P. Zhou, Y. Qi, Tianjin Zhang, L. Panina, Y. Fetisov","doi":"10.17725/rensit.2023.15.003","DOIUrl":"https://doi.org/10.17725/rensit.2023.15.003","url":null,"abstract":"The magnetoimpedance effect and the converse magnetoelectric effect in a planar heterostructure consisting of mechanically bonded layers of amorphous ferromagnet FeBSiC and piezoelectric lead zirconate titanate are studied. Magnetoimpedance was observed in the frequency range of 0.1-40 MHz and bias dc magnetic field of 0-300 Oe; the maximum magnitude of the effect at a frequency of 10 MHz reached 12%. The converse magnetoelectric effect was observed in magnetic fields of 0-50 Oe; the maximum value of the effect at the structure acoustic resonance frequency of 40 kHz was 1.45 G/(V/cm). Amplitude modulation of the magnetoimpedance by an electric field at the resonance frequency of the structure with a coefficient of ~1∙10─2 is found. Modulation occurs as a result of a combination of the piezoelectricity and magnetostriction of the layers, which leads to a change in the transverse magnetic permeability and the thickness of the skin-layer of the ferromagnet.","PeriodicalId":37476,"journal":{"name":"Radioelektronika, Nanosistemy, Informacionnye Tehnologii","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88391297","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}
Pub Date : 2023-03-31DOI: 10.17725/rensit.2023.15.081
Fedor B. Serkin
The properties of a local positioning system operating in the 2.4 GHz ISM band, which is capable of supplementing the constellation with local system signals to achieve high positioning accuracy in a complex interference environment, are investigated. In this case, global navigation satellite systems (GNSS) signal receivers often also implement other methods for estimating the position or parameters associated with it: inertial systems, ultra-wideband systems, radars, etc. In this paper, the study of the properties of a local positioning system operating in the 2.4 GHz ISM band , capable of supplementing the constellation with local system signals to achieve high positioning accuracy in difficult conditions. The emphasis here is on indoor operation of the system when GNSS signals are unavailable. In addition, there are a large number of reflected signals in the room. The paper presents a method for describing reflected signals using the Jones vector, as well as the synthesis of optimal algorithms for estimating signal parameters under complex conditions for simplified scenarios. With the help of modeling, it is shown that the optimal methods are poorly applicable to real situations, however, they allow a better understanding of the physics of processes. Based on this understanding, a signal shaping technique is proposed to create a large redundancy of measurements in the receiver, as well as an empirical method for rejecting false measurements. With the help of this method, it has been experimentally shown that indoors in difficult conditions and in the presence of multipath, it is possible to achieve the RMS positioning error of less than 10 centimeters.
{"title":"Frequency-Polarization Signal Processing to Combat Multipath in Local Positioning Systems.","authors":"Fedor B. Serkin","doi":"10.17725/rensit.2023.15.081","DOIUrl":"https://doi.org/10.17725/rensit.2023.15.081","url":null,"abstract":"The properties of a local positioning system operating in the 2.4 GHz ISM band, which is capable of supplementing the constellation with local system signals to achieve high positioning accuracy in a complex interference environment, are investigated. In this case, global navigation satellite systems (GNSS) signal receivers often also implement other methods for estimating the position or parameters associated with it: inertial systems, ultra-wideband systems, radars, etc. In this paper, the study of the properties of a local positioning system operating in the 2.4 GHz ISM band , capable of supplementing the constellation with local system signals to achieve high positioning accuracy in difficult conditions. The emphasis here is on indoor operation of the system when GNSS signals are unavailable. In addition, there are a large number of reflected signals in the room. The paper presents a method for describing reflected signals using the Jones vector, as well as the synthesis of optimal algorithms for estimating signal parameters under complex conditions for simplified scenarios. With the help of modeling, it is shown that the optimal methods are poorly applicable to real situations, however, they allow a better understanding of the physics of processes. Based on this understanding, a signal shaping technique is proposed to create a large redundancy of measurements in the receiver, as well as an empirical method for rejecting false measurements. With the help of this method, it has been experimentally shown that indoors in difficult conditions and in the presence of multipath, it is possible to achieve the RMS positioning error of less than 10 centimeters.","PeriodicalId":37476,"journal":{"name":"Radioelektronika, Nanosistemy, Informacionnye Tehnologii","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82818517","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}
Pub Date : 2023-03-31DOI: 10.17725/rensit.2023.15.095
V. Zhigalov, A. Parkhomov, V. Nevolin
The results of studies of two sources of strange radiation are described: a reactor based on incandescent lamps and electrolytic cell. New types of strange radiation tracks are presented: drip tracks and diffuse spots. Possible reasons for the variability of track intensity are analyzed.
{"title":"Invesigation of strange radiation tracks near incandescent lamps and an electrolytic cell","authors":"V. Zhigalov, A. Parkhomov, V. Nevolin","doi":"10.17725/rensit.2023.15.095","DOIUrl":"https://doi.org/10.17725/rensit.2023.15.095","url":null,"abstract":"The results of studies of two sources of strange radiation are described: a reactor based on incandescent lamps and electrolytic cell. New types of strange radiation tracks are presented: drip tracks and diffuse spots. Possible reasons for the variability of track intensity are analyzed.","PeriodicalId":37476,"journal":{"name":"Radioelektronika, Nanosistemy, Informacionnye Tehnologii","volume":"227 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73683005","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}
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