THE ALGORITHM OF PRECISE POSITIONING USING GNSS SIGNALS FOR LEO SATELLITES
In this paper we consider the Kalman filter and written mathematical models of the navigation observations for functioning precise point positioning (PPP) mode. Also, described the features of the navigation solution in the case when user’s navigation equipment is located on the LEO satellite. Formed Kalman filter equations, showed the formation of the vector of the estimated parameters, the observation vector and the observation matrix, matrix of the observation noises and state transition model matrix, taking into account the specifics of solving navigation task in the precise point positioning mode for LEO satellites.
Keywords: satellite navigation, precise point positioning, Kalman filter, GNSS, LEO satellite, precise ephemeris information.
QUALITY ANALYSIS OF THE PRECISE EPHEMERIS ШNFORMATION FOR LEO SATELLITES COORDINATES' DETERMINATION
After experimental data analysis were selected sources of final precise ephemeris data that will be used for calculating the position of LEO satellites in the post-processing mode. In addition to this was produced a priori estimate of the accuracy of determining the coordinates of LEO
satellites in real time, based on the results of the analysis on the navigation solution obtained using precise real-time ephemeris.
Keywords: GNSS, precise point positioning, precise ephemeris information, LEO satellite, experimental research, real-time precise ephemeris.
JAMMING COEFFICIENTS OF FUNCTIONS OF ACQUISITION AND TRACKING OF NAVIGATION SIGNALS OF CONSUMER NAVIGATION EQUIPMENT OF SRNS
Method of determining of jamming coefficients of the functions of acquisition and tracking of navigation signals of satellite radio navigation systems are proposed. For these functions indices of jamming quality are determined, which are based on probability of failure to detect satellite and probability of loss of tracking.
Keywords: satellite radio navigation systems, jamming, tracking, acquisition.
METHODS TO ENSURE EFFICIENCY OF REGIONAL SYNCHRONOUS NETWORKS
V.L. Karyakin, PSUТI, department of radio communication, radio broadcasting and television, professor, Dr.Sci.(Tech);email@example.com
D.V. Karyakin, Russian representation of Juniper Networks, senior systems engineer, Ph.D.; firstname.lastname@example.org
L.A. Morozova, PSUTI, department of economics and production, associate professor, Ph.D.; email@example.com
The analysis methods of the organization of broadcasting in different variants of the formation of single-frequency network SFN with the insertion of regional content and ways to ensure their serviceability. Problems in implementing distributed software modification technology are noted.
Keywords: SFN network, DVB-T2 standard, modification programs, the regional multiplex.
ACCURACY IN POSITIONING OF THE NEW GENERATION COMMUNICATION SYSTEMS
A.S. Bogdanov, Moscow Aviation Institute (MAI), department «Infocommunications», associate professor, Ph.D.; a. firstname.lastname@example.org
V.A. Shevtsov, MAI, head of department «Infocommunications», professor, Dr.Sci.(Tech.); email@example.com
The paper deals with the synchronization of promising mobile networks. The results of the research position error in the system due to the new generation of location-based radio-navigation signal sources and the structure of their own network synchronization. To determine the location in the integrated network, given the transition networks to packet-switched communication, it is advisable to perform the synchronization procedure using PTP algorithm. A model for synchronization of base stations, examines the possible delay in the passage of the synchronization packet. The developed software model allows the study of position error in the integrated system of the new generation of communication based on radio-navigation signal source location and the proposed network synchronization local radio navigation network structure.
Keywords: radio, mobile, location, GSM, UMTS, LTE, radio navigation; synchronization model.
MODELING SERVICE CHANNEL OF THE TRANSMISSION ROUTE INFORMATION FLYING ADAPTIVE COMMUNICATION NETWORK
V.V. Borodin, Moscow Aviation Institute (MAI), associate professor, Ph.D.; firstname.lastname@example.org
A.M. Petrakov, MAI, associate professor, Ph.D.; email@example.com
V.A. Shevtsov, MAI, professor, Dr.Sci. (Tech.); firstname.lastname@example.org
We consider the problem of determining the probabilistic-time characteristics of algorithms broadcast routing information in adaptive networks and determine the requirements for the overhead channel of the transmission of this information. Comparative analysis of multiple access protocols and identify areas for their most effective use.
Keywords: mobile communication networks, multiple access protocols, routing, dynamic network topology changes.
ALGORITHMS EFFICIENCY FOR ATTRIBUTES ISOLATION IN APPLICATIONS CLASSIFICATION PROBLEM WITH INTELLIGENT TRAFFIC ANALYSIS
O.I. Sheluhin, MTUCI, head of department of Information security, professor, Dr.Sci.(Tech.); email@example.com
A.G. Simonyan, MTUCI, assistant professor, Dr.Sci.(Tech.); firstname.lastname@example.org
A.V. Vanyushina, MTUCI, senior lecturer; email@example.com
To assess the effectiveness of the classification algorithms in the mode of training and testing using the developed hardware and software formed the base FTP traffic of these applications, Web (HTTP, HTTPS), Мail (SMTP, IMAP), SSH, Skype (TCP, UDP). 66% of the original data received from traffic streams was used in the training mode, the rest was used to test and evaluate the performance of the algorithms classification by means of machine learning methods. To reason the selection of classification characteristics wrapping and filtering algorithms were used for features detection. It has been shown that many of the attributes used for traffic classification are not significant for information gain and their usage has a minor effect on classification performance. Such attributes include size and number of packages in the stream in the forward and backward direction. InfoGain, CFS and Wrapper algorithms have been studied. It has been shown that the use of wrapper algorithm for feature selection is a resource-intensive computing task, which takes a long time in case of large number of attributes. It is shown that among all considered algorithms during the training phase S4.5; SVM; AdaBoost, Bagging, Naïve Bayes the S4.5 and Baggins algorithms should be preferred. Classifiers' test using SVM, C4.5 (J48), AdaBoost and Bagging algorithms, has shown that the best results are provided by Bagging and AdaBoost algorithms in conjunction with C4.5 (J48).
Keywords: classification, reliability, DataMining, F-measure, attributes, Random Forest, SVM, AdaBoost, Naïve Bayes, metrics, protocol, stream, package, bytes.
THE METHOD OF RADIO ELECTRONIC SYSTEM’S OPTIMAL STRUCTURE CHOICE
S. Kuznetsov, Pushkin State Museum, head of department of Information Technology; askuznetsov. firstname.lastname@example.org
S. N. Kuznetsov, Moscow Aviation Institute (MAI), department «Radio electronics for flying vehicles», associate professor, Ph.D.; email@example.com
M.N. Ushkar, MAI, head of department «Design and technology RES», professor, Ph.D.; firstname.lastname@example.org
The method of a choice of optimal structure of radio electronic system (RES), based on modular principle, is considered. This construction principle allows to use modules of high productive preparation or their components and to reduce cost of design. The method is based on the using of automated information system of a choice of modules RES. The paper proposes to use the coefficient of coverage for each structure of RES by modules of high productive preparation. These coefficients allow to obtain a comparative evaluation of the design costs. The matrix of coverage is used to obtain absolute values of cost and time of the design of modules. The main result of this work is the fact that the offered method allows to reduce cost and time of design of RES.
Keywords: CAD of radioelectronic systems, high productive preparation modules, databases, electronic archive, Unified system of design documentation.
USE OF INTEGRATED RADIO RECEIVERS TO IMPROVE TECHNICAL CHARACTERISTICS OF MONITORING EQUIPMENTS
V.A. Kozmin, «IRCOS» JSC, director for scientific works, docent, Ph.D.; email@example.com
The article describes the methods of reducing the harmful effects of long antenna feeders on the characteristics of radio monitoring equipment. It is shown that the use of low-noise preamplifiers does not always guarantee a good result especially when there is strong signal attenuation in the feeder. Integration of digital radio receivers into the structure of antenna systems improves the technical characteristics of equipment. This approach improves the dynamic range and accuracy of measurements and direction finding, allows the use of low-cost long flexible coaxial, Ethernet or fiber optic feeders as downloads.
Keywords: radiomonitoring, monitoring equipment, technical characteristics, antenna feeder, attenuation, low-noise preamplifier, noise factor, noise figure, dynamic range, linearity, digital radio receiver, antenna system.
CYCLOSTATIONARY MODELS OF RADIO SIGNALS WITH QUADRATURE AMPLITUDE MODULATION
Eu.N. Efimov, Moscow Aviation Institute (MAI), Ph.D., student, Federal State Institution «Scientific Research Institute for System Analysis of the Russian Academy of Sciences», senior project engineer; firstname.lastname@example.org
T.Ya. Shevgunov, MAI, National Research University Higher School of Economics, associate professor, Ph.D.; email@example.com
This paper overviews models of cyclostationary signals, i.e. the random signals with intrinsic periodicity hidden in their structure. Statistical parameters such as mean and autocorrelation of these signals are periodic functions in time. Primary cyclostationary characteristics of amplitude modulated signals and of pulse-amplitude modulated signals are investigated. The yclostationary model for the passband signal with wide sense stationary complex envelopes is proposed. Also, this paper presents a concept scheme for cyclostationary characteristics estimator in frequency domain using the correlation analyzer of the quadrature components of the signals.
Keywords: cyclostationarity, signals and systems, quadrature amplitude modulation, spectral analysis, correlation analysis.
POSSIBILITY OF SUPPRESSION OF EXTERNAL INTERFERENCES BY MEANS OF JOINT CONTROLLING OF RECEIVING AND TRANSMISSION OF DIVERSED SIGNALS
O.R. Nikitin, Vladimir State University (VlSU), chief of department of radioengineering, professor, Dr. Sci.(Tech.); firstname.lastname@example.org
P.A. Polushin, VlSU, department of radioengineering, professor, Dr. Sci.(Tech.); polushin. email@example.com
I. Julani, VlSU, department of radioengineering, postgraduate student.
Various ways of elimination of negative influence of external internal interferences on two-sided communication systems with space diversion are examined in the article. Matrix of communication coefficients is determining by means of special signals-markers. Summing signal coefficients and distribution power coefficients between transmitting antennas are defined. Optimal values of coefficients are calculated. Algorithms of divided regulation of signals summing and interference compensation of are considered.
Keywords: divorced signals, external interferences, joint control.