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SYNCHROINFO 2018 Systems of Signal Synchronization, Generating and Processing in Telecommunications, IEEE Conference # 43613
The international scientific and engineering conference “Systems of Signal Synchronization, Generating and Processing in Telecommunications” has been held since 1974. For 44 years of work the conference has become a widely known forum for specialists of the field.
The papers which are discussed at the conference can be divided into the following chapters:
– Synchronization Systems and Devices;
– Signal Generating and Shaping Devices;
– Signal Processing Devices.
The chapters content is concerned with fundamental problems of signal synchronization, generating and processing in the field of communications, broadcasting, radar, radio guidance and radio control. The questions of the practical issues are also including.
The presentations are made by the scientists and developers from 10 countries: Belarus, Azerbaijan, Germany, Kazakhstan, China, Lebanon, Mongolia, Russia, Uzbekistan and Ukraine.
The scientific paper is dedicated to the investigation of a rectangular waveguide R32 type with magnetic wall of mushroom-shaped metamaterial supplemented by a dielectric substrate. The computer model of the waveguide filter under consideration and its quantitative characteristics of S-parameters and voltage standing wave ratio received are presented. All collected data are appropriately organized in terms of convenience to compare the figures and submitted as the frequency dependence plots which are more representative and straightforward for analysis. Based on the results obtained it is possible to make assumptions about the qualitative transformation of waveguide properties under the influence of a mushroom-shaped metamaterial and prospects for a future integration this construction in the microwave devices. This groundbreaking treatment could be an underlying solution to the problem of miniaturization and performance in the modern technology development.The scientific paper is dedicated to the investigation of a rectangular waveguide R32 type with magnetic wall of mushroom-shaped metamaterial supplemented by a dielectric substrate. The computer model of the waveguide filter under consideration and its quantitative characteristics of S-parameters and voltage standing wave ratio received are presented. All collected data are appropriately organized in terms of convenience to compare the figures and submitted as the frequency dependence plots which are more representative and straightforward for analysis. Based on the results obtained it is possible to make assumptions about the qualitative transformation of waveguide properties under the influence of a mushroom-shaped metamaterial and prospects for a future integration this construction in the microwave devices. This groundbreaking treatment could be an underlying solution to the problem of miniaturization and performance in the modern technology development.
The purpose of this paper is to investigate the performance of the protocol of interaction between the reader and the tags. The subject of the work is automatic vehicle identification system (AVI) making use of passive ultra-high frequency radio frequency identification (UHF RFID) under EPC Class 1 Generation 2 protocol. In the thesis, protocol specifications that affect the probability of successful identification are considered and a simulation model of the communication protocol between RFID tags and the reader is given. The purpose of the thesis is the analysis and modeling of the radio frequency identification protocol standard EPC Class 1 Generation 2. During the diploma work, the EPC Class 1 Generation 2 standard was studied, which describes the technology of passive radio frequency identification, in particular, the communication protocol between tags with the reader, the anticollisional procedure for interrogating tags, access to various areas of tag memory, the reader's operating parameters, security issues. To simplify the description and logical separation of the functional presented in the standard, two levels are introduced: physical and logical. The description of these levels is given in the thesis. For the performance analysis, a model of a radio frequency identification system in Python 3 was developed. The software allows to simulate the procedure of interrogating tags and build and analyze the dependencies of the number of successfully read tags on the settings of the reader based on the model described above.
This paper is a continuation of the author’s previous study on methods of velocity measurements of navigation receivers and devoted to their comparative analysis.
Each method of measuring velocity has a few parameters. Let us fix all parameters except for one (main) and vary this parameter. The value of each varied parameter corresponds to some noise error of velocity measurements which can be characterized by standard deviation, or SD (cm/s). A dynamic model of GNSS receiver motion determines dynamic errors. Maximal dynamic error (MDE) (cm/s) is of interest in this case. This error depends on “maneuver phase”, i.e., a shift of the maneuver start time from the starting point of PLL control period and also the starting point of the secondary processing period. The maximal value of MDE is of interest in these shifts.
So, for each value of the varied parameter there is a pair of numbers: SD and MDE. Let us arrange these numbers in plane of the coordinate system: x-axis is MDE, and y-axis is SD. Connect nearest points and obtain a curve which is called an exchange diagram. Since SD and MDE vary within a wide range, the diagrams should be built in logarithmic scale, that is in dB relative to 1 cm/s. Let us call them logarithmic exchange diagrams (LED). Different LED were plotted for tough and soft dynamic scenarios for different methods of velocity measurements including the conventional one frequently discussed in the literature.
As a result of the analysis, a method of generating frequency estimates of the input signal and their further filtering using an after-satellite second order tracking filter, and a method based on quasi-optimal estimates of the input signal phase and further after-satellite filtration using the third order tracking filter have been recommended for tougher dynamic conditions. Under more favorable conditions in addition to the two above, a method of generating coordinate increments over one period with further after-coordinate filtration using the second order tracking filter, and a method of generating local coordinates with further aftercoordinate filtration using the third order tracking filter have been also recommended. In conclusion, a law of velocity estimate SD variation for one of the best recommended methods was investigated in the process of varying method parameters.
Measurements of velocity in navigation receivers are performed in two stages. At the primary (after-satellite) processing stage each of received signals is synchronized using a separate PLL, after that an estimation block (EB) estimates nonenergy (phase and frequency) and energy (SNR) parameters of the received signal. Doppler primary estimations can be subject to after-satellite filtration to obtain secondary frequency estimates. A number of Doppler estimates are conversed into primary estimates of velocity vector projections (for example, onto axes of the local Cartesian coordinate system) using the least square method (LSM). Primary estimates of velocity can be filtered at the secondary (after-coordinate) processing. Secondary velocity vector coordinates are outputted to users.
The present paper considers different methods of measuring velocity, they being different from each other by different tracking filters of primary and secondary processing and different EB. Primary filters operate at the same control frequency Fc as PLL (for instance, at Fc= 200 Hz), and LSM and secondary filters – at lower frequency FE < Fc (for example, at FE=100 Hz or FE=10 Hz). To shift from Fc to FE, some samples are rejected (intermediate samples are thrown). EB generates either primary estimates of instantaneous frequency or instantaneous phase of the input signal, or primary estimates of average input phase over control period Tc=Fc^-1. These primary estimates are fed to the filters of primary processing. At the outputs of these filters either secondary estimates of instantaneous frequency or estimates of averaged frequency and it’s derivative over period Tc are outputted which further are recalculated in estimates of instantaneous frequency. Based on thinned instantaneous phase estimates sometimes there are generated increments of these phase estimates over period TE = FE^-1. Primary estimates of either coordinates of the instantaneous velocity vector or averaged over period TE are fed to the input of secondary processing filters. In the first case, secondary estimates of instantaneous coordinates of the velocity vector are obtained at filter outputs at once. In the second case, at the filter outputs there are estimates of averaged velocities and accelerations over period TE which are further calculated in estimates of instantaneous velocity vector coordinates.
It has been shown that frequency estimation typically used in analog systems brings about a biased frequency (and hence, velocity) estimate when a receiver with digital PLLs has constant non-zero acceleration. Various algorithms of non-biased estimation have been also considered.
The 18 full and 13 short papers presented were carefully reviewed and selected from 255 submissions. There were organized in topical sections named: Image Processing, Pattern Analysis and Machine Vision; Information and Data Convergence; Disruptive Technologies for Future; E-Governance and Smart World
In our earlier studies, we found the effect of non-conventional synchronization, which is a specific type of nonlinear stable beating in the system of two weakly coupled autogenerators with hard excitation given by generalized van der Pol-Duffing characteristics. The corresponding synchronized dynamics are due to a new type of attractor in a reduced phase space of the system. In the present work, we show that, as the strength of nonlinear stiffness and dissipation are changing, the phase portrait undergoes a complicated evolution leading to a quite unexpected appearance of difficult to detect “repellers” separating a stable limit cycle and equilibrium points in the phase plane. In terms of the original coordinates, the limit cycle associates with nonlinear beatings while the stationary points correspond to the stationary synchronous dynamics similar to the so-called nonlinear local modes.
ICUMT is an IEEE premier an annual international congress providing an open forum for researchers, engineers, network planners and service providers targeted on newly emerging algorithms, systems, standards, services, and applications, bringing together leading international players in telecommunications, control systems, automation and robotics. The event is positioned as a major international annual congress for the presentation of original results achieved from fundamental as well as applied research and engineering works.
The international scientific and engineering conference “Systems of Signal Synchronization, Generating and Processing in Telecommunications” has been held since 1974. For 46 years of work the conference has become a widely known forum for specialists of the field.
The papers which are discussed at the conference can be divided into the following chapters:
– Synchronization Systems and Devices;
– Signal Generating and Shaping Devices;
– Signal Processing Devices.
– Special chapter: “Problems of microwave electronics” them. V.A. Solntsev
The chapters content is concerned with fundamental problems of signal synchronization, generating and processing in the field of communications, broadcasting, radar, radio guidance and radio control. The questions of the practical issues are also including.
The presentations are made by the scientists and developers from 10 countries: Belarus, Azerbaijan, Germany, Kazakhstan, China, Lebanon, Mongolia, Russia, Uzbekistan and Ukraine.
Branch Director of the IEEE Worldwide Limited in the Russian Federation and Scientific Secretary of Russian (Moscow) IEEE Circuits and Systems (CAS04) Chapter Roman Y. Ivanyushkin promotes this conference among the Engineers in the field of Telecommunications. He also organizes the work of conference Chapter “Signals Generating and Shaping Devices”.
Chairman of Russian (Moscow) IEEE Circuits and Systems (CAS04) Chapter Valentin Kuleshov is the Chairman of the Technical Program Committee.
Every year Director and Chairman of Russian Branch IEEE Circuits and System Society are participate as co-Chairs of the Chapter “Signals Generating and Shaping Devices”.
Chairman of the Steering Committee Alexander Pestryakov (Doctor of Technical Science, Professor, Radio and Broadcasting Faculty Dean of the Moscow Technical University of Communications and Informatics) in cooperation with Director and Chairman of Russian Branch IEEE Circuits and System Society appoints the conference committee chairs and other key members.
Conference will produce a publication.
Generalized error-locating codes are discussed. An algorithm for calculation of the upper bound of the probability of erroneous decoding for known code parameters and the input error probability is given. Based on this algorithm, an algorithm for selection of the code parameters for a specified design and input and output error probabilities is constructed. The lower bound of the probability of erroneous decoding is given. Examples of the dependence of the probability of erroneous decoding on the input error probability are given and the behavior of the obtained curves is explained.
The dynamics of a two-component Davydov-Scott (DS) soliton with a small mismatch of the initial location or velocity of the high-frequency (HF) component was investigated within the framework of the Zakharov-type system of two coupled equations for the HF and low-frequency (LF) fields. In this system, the HF field is described by the linear Schrödinger equation with the potential generated by the LF component varying in time and space. The LF component in this system is described by the Korteweg-de Vries equation with a term of quadratic influence of the HF field on the LF field. The frequency of the DS soliton`s component oscillation was found analytically using the balance equation. The perturbed DS soliton was shown to be stable. The analytical results were confirmed by numerical simulations.
Radiation conditions are described for various space regions, radiation-induced effects in spacecraft materials and equipment components are considered and information on theoretical, computational, and experimental methods for studying radiation effects are presented. The peculiarities of radiation effects on nanostructures and some problems related to modeling and radiation testing of such structures are considered.
This volume presents new results in the study and optimization of information transmission models in telecommunication networks using different approaches, mainly based on theiries of queueing systems and queueing networks .
The paper provides a number of proposed draft operational guidelines for technology measurement and includes a number of tentative technology definitions to be used for statistical purposes, principles for identification and classification of potentially growing technology areas, suggestions on the survey strategies and indicators. These are the key components of an internationally harmonized framework for collecting and interpreting technology data that would need to be further developed through a broader consultation process. A summary of definitions of technology already available in OECD manuals and the stocktaking results are provided in the Annex section.