Pub Date : 2017-06-01DOI: 10.17238/ISSN2409-0239.2017.2.61
N. Gribkov, A. V. Bobylev, Yu. A. Yurkov, S.Yu. Zhukovskiy, V. N. Gribkov
The paper studies а communication device that is applied in radio telemetry systems for information transfer with frequency modulation and time division of channels. The method for forming a data flow with the doubled informational content (2×640 kHz) in the telemetry system structure of the “SKUT-40” type is considered in the article. The employed circuit engineering solutions make it possible to reduce the effect of crosstalks at the borders of forming measured and service signals upon the nominal value of the reference frequency. The created data flows are transmitted over a radio channel through the modified standard radio transmitter of the UPM type and received by receiving and recording equipment like “Vector” at two carrier frequencies. The result of the proposed technical solutions is the essential increase (by 2 times) of information content of the radio channel of the “SKUT40” type that is a contributing factor for rather promising practical implementation of the reached technical baseinto the existing complexes of telemetry measurements.
{"title":"Radio Transmitter with Frequency Modulation and Time Division of Channels for High-Information Telemetry Systems","authors":"N. Gribkov, A. V. Bobylev, Yu. A. Yurkov, S.Yu. Zhukovskiy, V. N. Gribkov","doi":"10.17238/ISSN2409-0239.2017.2.61","DOIUrl":"https://doi.org/10.17238/ISSN2409-0239.2017.2.61","url":null,"abstract":"The paper studies а communication device that is applied in radio telemetry systems for information transfer with frequency modulation and time division of channels. The method for forming a data flow with the doubled informational content (2×640 kHz) in the telemetry system structure of the “SKUT-40” type is considered in the article. The employed circuit engineering solutions make it possible to reduce the effect of crosstalks at the borders of forming measured and service signals upon the nominal value of the reference frequency. The created data flows are transmitted over a radio channel through the modified standard radio transmitter of the UPM type and received by receiving and recording equipment like “Vector” at two carrier frequencies. The result of the proposed technical solutions is the essential increase (by 2 times) of information content of the radio channel of the “SKUT40” type that is a contributing factor for rather promising practical implementation of the reached technical baseinto the existing complexes of telemetry measurements.","PeriodicalId":436954,"journal":{"name":"Rocket-Space Device Engineering and Information Systems","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114293930","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 : 2017-06-01DOI: 10.17238/issn2409-0239.2017.2.20
К.N. Sviridov
{"title":"Limiting Instrumental Resolution of the Resurs-P Spacecraft (No. 1, 2, 3)","authors":"К.N. Sviridov","doi":"10.17238/issn2409-0239.2017.2.20","DOIUrl":"https://doi.org/10.17238/issn2409-0239.2017.2.20","url":null,"abstract":"","PeriodicalId":436954,"journal":{"name":"Rocket-Space Device Engineering and Information Systems","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130526521","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 : 2017-03-01DOI: 10.17238/issn2409-0239.2017.1.40
D. D. Gabriél'yan, V. I. Demchenko, A. E. Korovkin, D. Y. Razdorkin, Yu.A. Gvozdyakov, Yu. I. Poltavets
. The objective of the paper is to justify the approach to optimization of the parameters of the corrugated horn based exciters of multiband mirror antennas for different combinations of the overlapping bands and their realization in practice. The issues of building the feed systems based on the corrugated horns for multiband transceiving mirror antennas of satellite communication systems are studied. The conducted interrelation analysis of performance indicators of the satellite communication system with energy characteristics of the radio channel enabled one to justify the performance indicator of the multiband mirror antenna of the receiving ground station and its exciters. The performance indicator of the multiband mirror antenna is in the form of a multiplicative function taking account of the antenna noise Q-factor in each of the overlapping bands, and two co-factors determining the decrease in the effective noise Q-factor due to depolarization effects of the received signals and inaccuracy in antenna pointing during autotracking of SC. Employing a corrugated horn as exciters of multiband mirror antennas exciting the main H 11 mode and the highest H 21 mode permits one to create exciters for multiband mirror antennas with different functional capabilities, in particular with the modes of programmable guidance and autotracking based on the extreme and monopulse methods. The considerations of designing the exciters for communication systems with satellites in various types of orbits are studied.
{"title":"Building of Exciters of Multiband Mirror Antennas for Satellite Communication Systems","authors":"D. D. Gabriél'yan, V. I. Demchenko, A. E. Korovkin, D. Y. Razdorkin, Yu.A. Gvozdyakov, Yu. I. Poltavets","doi":"10.17238/issn2409-0239.2017.1.40","DOIUrl":"https://doi.org/10.17238/issn2409-0239.2017.1.40","url":null,"abstract":". The objective of the paper is to justify the approach to optimization of the parameters of the corrugated horn based exciters of multiband mirror antennas for different combinations of the overlapping bands and their realization in practice. The issues of building the feed systems based on the corrugated horns for multiband transceiving mirror antennas of satellite communication systems are studied. The conducted interrelation analysis of performance indicators of the satellite communication system with energy characteristics of the radio channel enabled one to justify the performance indicator of the multiband mirror antenna of the receiving ground station and its exciters. The performance indicator of the multiband mirror antenna is in the form of a multiplicative function taking account of the antenna noise Q-factor in each of the overlapping bands, and two co-factors determining the decrease in the effective noise Q-factor due to depolarization effects of the received signals and inaccuracy in antenna pointing during autotracking of SC. Employing a corrugated horn as exciters of multiband mirror antennas exciting the main H 11 mode and the highest H 21 mode permits one to create exciters for multiband mirror antennas with different functional capabilities, in particular with the modes of programmable guidance and autotracking based on the extreme and monopulse methods. The considerations of designing the exciters for communication systems with satellites in various types of orbits are studied.","PeriodicalId":436954,"journal":{"name":"Rocket-Space Device Engineering and Information Systems","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122795202","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 : 2017-03-01DOI: 10.17238/ISSN2409-0239.2017.1.71
P. Skorobogatov, K. Epifantsev, N. Diatlov
. In the space industry, the increase in the active service life of spacecraft (SC) is considered a current problem. One of the causes that leads to damage and decrease in the service life of SC is the effect of internal electrification. Voltage pulses caused by the effect of internal electrification affect the components of the radio electronic equipment of SC and can result in damage of electronic components. The influence of a pulse train with an energy lower than the threshold of failure leads to the effect of damage accumulation inside the components (additive effect). As a result, a failure occurs during the influence of the pulse with an energy lower than that of the threshold. The paper analyses the existing experimental results on revealing the additive effect. The effect of the influence of a voltage pulse train of subthreshold energies that affect very-large-scale integration circuits (VLSIC) created using modern submicron technologies are given. The obtained experimental results prove the presence of the additive effect in VLSIC under the influence of the voltage pulse train of subthreshold energies and make it possible to derive a dependence describing the character of the accumulation effect of damage in VLSIC. The derived dependence correlates well with the Arrhenius equation. It is the evidence that the failure in VLCIC under the influence of a voltage pulse of subthreshold energies is thermal in nature. Based on this dependence, a method to test the resistance of electronic component base (ECB) to the influence of the voltage pulse train is suggested.
{"title":"Additive Effects in VLSI Сircuits for Space Application under the Influence of Voltage Pulse Train and the Arrhenius Law","authors":"P. Skorobogatov, K. Epifantsev, N. Diatlov","doi":"10.17238/ISSN2409-0239.2017.1.71","DOIUrl":"https://doi.org/10.17238/ISSN2409-0239.2017.1.71","url":null,"abstract":". In the space industry, the increase in the active service life of spacecraft (SC) is considered a current problem. One of the causes that leads to damage and decrease in the service life of SC is the effect of internal electrification. Voltage pulses caused by the effect of internal electrification affect the components of the radio electronic equipment of SC and can result in damage of electronic components. The influence of a pulse train with an energy lower than the threshold of failure leads to the effect of damage accumulation inside the components (additive effect). As a result, a failure occurs during the influence of the pulse with an energy lower than that of the threshold. The paper analyses the existing experimental results on revealing the additive effect. The effect of the influence of a voltage pulse train of subthreshold energies that affect very-large-scale integration circuits (VLSIC) created using modern submicron technologies are given. The obtained experimental results prove the presence of the additive effect in VLSIC under the influence of the voltage pulse train of subthreshold energies and make it possible to derive a dependence describing the character of the accumulation effect of damage in VLSIC. The derived dependence correlates well with the Arrhenius equation. It is the evidence that the failure in VLCIC under the influence of a voltage pulse of subthreshold energies is thermal in nature. Based on this dependence, a method to test the resistance of electronic component base (ECB) to the influence of the voltage pulse train is suggested.","PeriodicalId":436954,"journal":{"name":"Rocket-Space Device Engineering and Information Systems","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128664056","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 : 2017-03-01DOI: 10.17238/issn2409-0239.2017.1.8
S. Trusov, O. I. Baraboshkin, S. Bobrovskiy
. The widespread adoption of satellite navigation technologies in everyday life leads to the fact that most users of navigation receivers are located in urban areas or parks, i.e. the areas in which the deterioration of navigation signals occurs. The A-GNSS is employed worldwide to improve the quality of navigation. The technology is designed to provide assisted information to the navigation receiver using a mobile networks. The study is conducted as a part of development of the A-GNSS version, oriented primarily to the GLONASS system user equipment. The results of the searching for the optimal method to provide the assistance information to the user device are reported in the article. The method takes into account various possibilities of the existing navigation equipment. The analysis of the composition of the necessary assisting information is carried out. The possibilities of the existing protocols are examined; the requirements for data transmission protocols in the future system are drawn up. It has been shown that today there is no universal standardized protocol for the assistance information transfer without the reference to networks standards, except the SUPL standard, which is supported by most modern smartphones. However, the SUPL standard is resource-intensive and redundant for the assistance information transfer, which makes it unpopular with the producers of the budget trackers and navigators. For these devices, the authors have developed the FNM protocol, undemanding to the computing and network resources. The data package for a quick start of a navigation receiver is 3 Kb with FNM. The protocol allows the user to request and receive the entire range of the assistance information and supports the monitoring of the changes in cellular network topologies and subscriber location. As a of of the potential protocols, it been decided to implement the support for both SUPL 2.0 standard and the FNM protocol in the future system for the transmission of the assistance information.
{"title":"Selection of the Assistance Data Transfer Protocols through Cellular Channels for the A-GLONASS System","authors":"S. Trusov, O. I. Baraboshkin, S. Bobrovskiy","doi":"10.17238/issn2409-0239.2017.1.8","DOIUrl":"https://doi.org/10.17238/issn2409-0239.2017.1.8","url":null,"abstract":". The widespread adoption of satellite navigation technologies in everyday life leads to the fact that most users of navigation receivers are located in urban areas or parks, i.e. the areas in which the deterioration of navigation signals occurs. The A-GNSS is employed worldwide to improve the quality of navigation. The technology is designed to provide assisted information to the navigation receiver using a mobile networks. The study is conducted as a part of development of the A-GNSS version, oriented primarily to the GLONASS system user equipment. The results of the searching for the optimal method to provide the assistance information to the user device are reported in the article. The method takes into account various possibilities of the existing navigation equipment. The analysis of the composition of the necessary assisting information is carried out. The possibilities of the existing protocols are examined; the requirements for data transmission protocols in the future system are drawn up. It has been shown that today there is no universal standardized protocol for the assistance information transfer without the reference to networks standards, except the SUPL standard, which is supported by most modern smartphones. However, the SUPL standard is resource-intensive and redundant for the assistance information transfer, which makes it unpopular with the producers of the budget trackers and navigators. For these devices, the authors have developed the FNM protocol, undemanding to the computing and network resources. The data package for a quick start of a navigation receiver is 3 Kb with FNM. The protocol allows the user to request and receive the entire range of the assistance information and supports the monitoring of the changes in cellular network topologies and subscriber location. As a of of the potential protocols, it been decided to implement the support for both SUPL 2.0 standard and the FNM protocol in the future system for the transmission of the assistance information.","PeriodicalId":436954,"journal":{"name":"Rocket-Space Device Engineering and Information Systems","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133927858","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 : 2017-03-01DOI: 10.17238/issn2409-0239.2017.1.15
K. Sviridov
. Optical images of Earth remote sensing (ERS) are distorted by the surface layer of the turbulent atmosphere. To com-pensate for the atmospheric distortions it is suggested to utilize the algorithmic technologies of postdetector spatial filtering of the distorted image. The article proposes a solution to the problem of the a posteriori determination of the optical transfer function (OTF) from the remote sensing telescope-atmosphere system by its short-exposure image. The existing algorithms of a posteriori determination of the magnitude and phase estimates of the instantaneous OTF atmosphere-telescope are discussed and new ones are provided. Therewith, to assess the OTF module, it is proposed to define and use a statistically similar object as a reference, and for the evaluation of the phase of the OTF it is proposed to use the statistical averaging and the recursive reconstruction algorithm. According to the a posteriori obtained estimates of the magnitude and phase, the atmosphere-telescope OTF is formed, which is used to form the Wiener filter and spatial filtering atmospheric distortions of the captured image. The results of experiments confirming the theory are presented.
{"title":"A Posteriori Filtering Algorithms for Short-Exposure ERS Images, Spatially Invariant to Atmospheric Distortions","authors":"K. Sviridov","doi":"10.17238/issn2409-0239.2017.1.15","DOIUrl":"https://doi.org/10.17238/issn2409-0239.2017.1.15","url":null,"abstract":". Optical images of Earth remote sensing (ERS) are distorted by the surface layer of the turbulent atmosphere. To com-pensate for the atmospheric distortions it is suggested to utilize the algorithmic technologies of postdetector spatial filtering of the distorted image. The article proposes a solution to the problem of the a posteriori determination of the optical transfer function (OTF) from the remote sensing telescope-atmosphere system by its short-exposure image. The existing algorithms of a posteriori determination of the magnitude and phase estimates of the instantaneous OTF atmosphere-telescope are discussed and new ones are provided. Therewith, to assess the OTF module, it is proposed to define and use a statistically similar object as a reference, and for the evaluation of the phase of the OTF it is proposed to use the statistical averaging and the recursive reconstruction algorithm. According to the a posteriori obtained estimates of the magnitude and phase, the atmosphere-telescope OTF is formed, which is used to form the Wiener filter and spatial filtering atmospheric distortions of the captured image. The results of experiments confirming the theory are presented.","PeriodicalId":436954,"journal":{"name":"Rocket-Space Device Engineering and Information Systems","volume":"169 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114334994","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 : 2017-03-01DOI: 10.17238/ISSN2409-0239.2017.1.32
S. Medvedev, V. I. Shaposhnikov, O. A. Chekmazova
. The article studies the features of an optimum weight function derived for the received pulse signal with linear frequency modulation with a big signal base and the unknown set of reflected signals by the maximum useful signal-to-noise criterion at ortogonalization of the weight function of a part of the received interfering signals lying in the area of considerable side lobes of the correlation function. The effectiveness of processing is evaluated according to the whole set of possible interfering signals. The aim of the work is to increase the operation effectiveness of the system by finding the recommended characteristics of the algorithm for processing the reflected signal with linear frequency modulation, such as the limiting zone of the maximum suppression and boundary points. The analysis of the obtained data showed that the K indicator largely influences the window function. For its optimal values, there is no correlation of the losses from the width of the maximum suppression zone ( M -zone). A negligible decline appears only on the boarders of the range. For a greater (undesirable) K indicator, a considerable correlation of the useful signal level from the M zone value and from the signal duration (it worsens about twice) can be seen. The maximum value of the weight function decreases with the increase in the signal duration, and a linear dependence at the (undesirable) value K = 1,36 occurs. The field of application of the results obtained is quite wide: from optimization of the range and velocity measuring unit algorithms working under interference conditions to definition of amplitude-phase distribution in active phase-arrayed antennas for getting the necessary attenuation on side lobes of the antenna radiation pattern.
{"title":"Analysis of the Response Function Parameters at Optimum Weight Processing for Signals with Linear Frequency Modulation","authors":"S. Medvedev, V. I. Shaposhnikov, O. A. Chekmazova","doi":"10.17238/ISSN2409-0239.2017.1.32","DOIUrl":"https://doi.org/10.17238/ISSN2409-0239.2017.1.32","url":null,"abstract":". The article studies the features of an optimum weight function derived for the received pulse signal with linear frequency modulation with a big signal base and the unknown set of reflected signals by the maximum useful signal-to-noise criterion at ortogonalization of the weight function of a part of the received interfering signals lying in the area of considerable side lobes of the correlation function. The effectiveness of processing is evaluated according to the whole set of possible interfering signals. The aim of the work is to increase the operation effectiveness of the system by finding the recommended characteristics of the algorithm for processing the reflected signal with linear frequency modulation, such as the limiting zone of the maximum suppression and boundary points. The analysis of the obtained data showed that the K indicator largely influences the window function. For its optimal values, there is no correlation of the losses from the width of the maximum suppression zone ( M -zone). A negligible decline appears only on the boarders of the range. For a greater (undesirable) K indicator, a considerable correlation of the useful signal level from the M zone value and from the signal duration (it worsens about twice) can be seen. The maximum value of the weight function decreases with the increase in the signal duration, and a linear dependence at the (undesirable) value K = 1,36 occurs. The field of application of the results obtained is quite wide: from optimization of the range and velocity measuring unit algorithms working under interference conditions to definition of amplitude-phase distribution in active phase-arrayed antennas for getting the necessary attenuation on side lobes of the antenna radiation pattern.","PeriodicalId":436954,"journal":{"name":"Rocket-Space Device Engineering and Information Systems","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130393169","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 : 2017-03-01DOI: 10.17238/ISSN2409-0239.2017.1.53
V. Larin
. The article presents the technology of building of a prototype expert-diagnostic system (EDS) for analysis of flight path measurement information. The main function of the EDS is the identification and subsequent removal of abnormal measurements and the formation of a collection of correct information for further use in the cycle of ballistic and navigational support (BNO) calculations. The main analysis tool is filtering — a sequential comparison of each measurement with the system of criteria (filters), the values of which are determined based on the technical characteristics of the spacecraft of this type and the parameters of the medium in which the measurements were made. The proposed EDS project allows producing of a high-quality sample of abnormal measurements from the data collections for most types of flight path information and can be used in the BNO calculation cycle for spacecraft control.
{"title":"Building of a Prototype of Expert-Diagnostic System for the Analysis of Spacecraft Flight Path Measurement Information","authors":"V. Larin","doi":"10.17238/ISSN2409-0239.2017.1.53","DOIUrl":"https://doi.org/10.17238/ISSN2409-0239.2017.1.53","url":null,"abstract":". The article presents the technology of building of a prototype expert-diagnostic system (EDS) for analysis of flight path measurement information. The main function of the EDS is the identification and subsequent removal of abnormal measurements and the formation of a collection of correct information for further use in the cycle of ballistic and navigational support (BNO) calculations. The main analysis tool is filtering — a sequential comparison of each measurement with the system of criteria (filters), the values of which are determined based on the technical characteristics of the spacecraft of this type and the parameters of the medium in which the measurements were made. The proposed EDS project allows producing of a high-quality sample of abnormal measurements from the data collections for most types of flight path information and can be used in the BNO calculation cycle for spacecraft control.","PeriodicalId":436954,"journal":{"name":"Rocket-Space Device Engineering and Information Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130227017","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 : 2017-03-01DOI: 10.17238/ISSN2409-0239.2017.1.25
A. N. Ershov, V. Berezkin, S. Petrov, A. V. Petrov, D. A. Pochivalin
This article discusses the characteristic features, methods of calculation and end-to-end design of digital filters (DF) designed to generate and receive signals as a part of the currently developed radio systems of Earth remote sensing (ERS) with data rates from a few hundred Mbit/s up to several Gbit/s. The provided eye diagrams illustrate the need to consider the changes in the value of the peak factor of the output signal of a DF on the efficiency of the transmitter output power (the OBO (Outback Back Of)) value, the linearity margin from the power amplifier (PA) saturation point), and the requirements to the character synchronization system when changing the “roll of factor”. The choice of the structure of non-recursive digital filters with respect to the recursive structure for building the forming and filtering elements for a high-speed radio link is demonstrated. Dependency graphs of the curve Per = f(Ebit/No) are presented, taking into account the errors that arise due to the different kinds of imperfect realization of the characteristics of the radio links (including those due to non-ideal frequency characteristics of the DF). In practice, these curves are obtained by assessing the level of values Error Vector Modulation (EVM) or Modulation Error (MER) with methods of modeling and research on the hardware working in Xand Ka-bands using vector analysis instruments.
本文讨论了当前研制的数据速率从几百Mbit/s到几Gbit/s的地球遥感(ERS)无线电系统中产生和接收信号的数字滤波器(DF)的特点、计算方法和端到端设计。所提供的眼图说明，需要考虑DF输出信号的峰值因子值的变化对发射机输出功率效率(OBO (Outback Back of))值、功率放大器(PA)饱和点的线性余量)的影响，以及改变“滚转因子”时对字符同步系统的要求。针对高速无线电链路中形成和滤波元件的递归结构，给出了非递归数字滤波器结构的选择。考虑到由于无线电链路特性的不同类型的不完美实现(包括由于DF的非理想频率特性)而产生的误差，给出了曲线Per = f(Ebit/No)的依赖图。在实践中，这些曲线是通过评估误差矢量调制(EVM)或调制误差(MER)值的水平获得的，方法是使用矢量分析仪器对Xand ka波段工作的硬件进行建模和研究。
{"title":"Methods of Design and Hardware Implementation of Digital Filters for High-Speed Radio Link in Earth Remote Sensing Systems","authors":"A. N. Ershov, V. Berezkin, S. Petrov, A. V. Petrov, D. A. Pochivalin","doi":"10.17238/ISSN2409-0239.2017.1.25","DOIUrl":"https://doi.org/10.17238/ISSN2409-0239.2017.1.25","url":null,"abstract":"This article discusses the characteristic features, methods of calculation and end-to-end design of digital filters (DF) designed to generate and receive signals as a part of the currently developed radio systems of Earth remote sensing (ERS) with data rates from a few hundred Mbit/s up to several Gbit/s. The provided eye diagrams illustrate the need to consider the changes in the value of the peak factor of the output signal of a DF on the efficiency of the transmitter output power (the OBO (Outback Back Of)) value, the linearity margin from the power amplifier (PA) saturation point), and the requirements to the character synchronization system when changing the “roll of factor”. The choice of the structure of non-recursive digital filters with respect to the recursive structure for building the forming and filtering elements for a high-speed radio link is demonstrated. Dependency graphs of the curve Per = f(Ebit/No) are presented, taking into account the errors that arise due to the different kinds of imperfect realization of the characteristics of the radio links (including those due to non-ideal frequency characteristics of the DF). In practice, these curves are obtained by assessing the level of values Error Vector Modulation (EVM) or Modulation Error (MER) with methods of modeling and research on the hardware working in Xand Ka-bands using vector analysis instruments.","PeriodicalId":436954,"journal":{"name":"Rocket-Space Device Engineering and Information Systems","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126415617","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 : 2017-03-01DOI: 10.17238/ISSN2409-0239.2017.1.78
A. N. Pestunov, E. V. Kovaleva
The article is devoted to the development of channels for angular velocity measurement based on a digital fiber-optic gyroscope (FOG). The development is carried out to reduce the impact of microcircuit drift on the accuracy of angular speed measurement of open-loop FOG. The results of numerical simulation of the digital processing method of the transimpedance amplifier signal in open-loop FOG are presented. The estimation of the potential measurement quality of angular velocity by this method is performed, as well as the evaluation of the measurement quality of key parameters stabilized in open-loop FOG. The results were obtained from a numerical simulation of a 14-bit analog-to-digital converter (ADC) of successive approximation, as well as ADC signal processing with filters with finite pulse characteristic, in realistic noise conditions for a transimpedance amplifier signal. The simulation was performed using the MathCad. The simulation shows that the potentially achievable accuracy of angular velocity measurement by this method is 0,01% at a sampling rate of 50 MHz. The results demonstrate the possibility of using this method in the current development of strapdown inertial blocks (SIB) in open-loop FOG, as well as the possibility of implementing the described building principle of the angle-measuring channel using Russian electronic components.
{"title":"Development of Angular Velocity Measurement Channel Based on Digital Fiber-Optic Gyroscope","authors":"A. N. Pestunov, E. V. Kovaleva","doi":"10.17238/ISSN2409-0239.2017.1.78","DOIUrl":"https://doi.org/10.17238/ISSN2409-0239.2017.1.78","url":null,"abstract":"The article is devoted to the development of channels for angular velocity measurement based on a digital fiber-optic gyroscope (FOG). The development is carried out to reduce the impact of microcircuit drift on the accuracy of angular speed measurement of open-loop FOG. The results of numerical simulation of the digital processing method of the transimpedance amplifier signal in open-loop FOG are presented. The estimation of the potential measurement quality of angular velocity by this method is performed, as well as the evaluation of the measurement quality of key parameters stabilized in open-loop FOG. The results were obtained from a numerical simulation of a 14-bit analog-to-digital converter (ADC) of successive approximation, as well as ADC signal processing with filters with finite pulse characteristic, in realistic noise conditions for a transimpedance amplifier signal. The simulation was performed using the MathCad. The simulation shows that the potentially achievable accuracy of angular velocity measurement by this method is 0,01% at a sampling rate of 50 MHz. The results demonstrate the possibility of using this method in the current development of strapdown inertial blocks (SIB) in open-loop FOG, as well as the possibility of implementing the described building principle of the angle-measuring channel using Russian electronic components.","PeriodicalId":436954,"journal":{"name":"Rocket-Space Device Engineering and Information Systems","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114218127","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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