COMPARATIVE ANALYSIS OF UFMC AND OFDM TECHNOLOGIES IN 5G NETWORKS
I.V. Vorozhishchev, MTUCI, head of the laboratory of radioengineering systems; vorozhishchev. email@example.com
G.S. Bochechka, JSC NIITC, head of the innovation center department, Ph.D.; g. firstname.lastname@example.org
V.O. Tikhvinskiy, JSC NIITC, deputy general director on innovation technologies, professor of MTUCI, Dr.Sci. (Econ.); email@example.com
The new promising Universal Filtered Multi-Carrier (UFMC) technology for future 5G mobile networks is considered. The technology is compared with OFDM technology used in 4G networks, and its effectiveness is analyzed. The disadvantage of OFDM technology is the need of use of a cyclic prefix, which reduces data transmission rate. The UFMC technology allows to refuse a cyclic prefix, and thereby a spectral efficiency of mobile network can be increased in comparison with OFDM technology. Also, UFMC technology is less sensitive to estimation errors of frequency and time shifts.
Keywords: UFMC, OFDM, FBMC, spectral efficiency.
SIMULATION OF POSITIONING ERROR IN PERSPECTIVE INTEGRATED COMMUNICATION NETWORKS
A.S. Bogdanov, MAI, department of the infocommunications, associate professor, Ph.D.;firstname.lastname@example.org
A.A. Sorokin, MAI, department of infocommunications, master; email@example.com
V.A. Shevtsov, MAI, head of the department of infocommunications, professor, Dr.Sci.(Tech.);firstname.lastname@example.org
S.F. Boev, RTI Group, general designer, Dr.Sci. (Tech), Dr.Sci. (Econ.); email@example.com
The structure of integrated communication and navigation networks is considered. Methods for estimating the error in determining the location when the sources of the radio navigation signal are disynchronized in the form of the area of the curvilinear figure of the possible location zone, distance between the center of mass of the possible location zone and the point of true location, radius of equivalent circle, characterizing the zone of possible location are proposed. Their advantages and disadvantages are shown. The software that allows visualization of simulation results in the form of three-dimensional graphs is obtained. Modeling for various ways of assessment is carried out and the comparative analysis of the received results is performed.
Keywords: radio communication, error, location, GSM, UMTS, LTE, radio navigation, synchronization, model, integrated network.
BLIND IDENTIFICATION OF MULTIDIMENSIONAL SIGNAL AND ITS APPLICATION IN MIMO COMMUNICATION SYSTEMS
A.A. Berezovsky, VSUTI, department of theoretical bases of telecommunication and radio engineering systems, assistant professor, Ph.D.; andrey. firstname.lastname@example.org
O.V. Goriachkin, VSUTI, head of the department of theoretical bases of telecommunication and radio engineering systems, Dr.Sci.(Tech.); email@example.com
The MIMO communication system based on the use of redundant spatial encoding, performed by cyclic enumeration of transmission channels, is presented. For this system it is proposed to write a mathematical model of one-dimensional MIMO channel in the form of multidimensional SIMO channel. The conditions of blind channel identifiability for this model are formulated. For blind identification of the multi-dimensional SIMO channel it is proposed to use the cross-relations method in polynomial interpretation.
Keywords: blind identification of systems, space-time coding, MIMO communication system, cross-relations methode rules, maximum damage, residual damage, prevented damage.
THE EFFICIENCY ESTIMATION OF RADIO NETWORK DEVELOPMENT PROJECT WITH THE USE OF EXPECTED UTILITY FUNCTIONALITY
The paper studies features of radio network development (stationary and mobile communication, telecasting and broadcasting) in metropolis. When choosing the options for placing new radio objects (RO), it is proposed to use the functionality of expected utility (FEU) as a complex criterion for estimating their comparative efficiency. The example of applying FEU in radio network development project by increasing the RO power is presented.
Keywords: options of radio network development, comparative efficiency, complex criterion of estimation, functionality of expected utility.
POSSIBILITIES OF NOISELESS CODING OF THE ITERATIVE CODE
A.S. Adzhemov, MTUCI, president-chairman of the Board of Trustees, head of the department of general communication theory, professor, Dr.Sci. (Tech.); firstname.lastname@example.org
Noiseless coding is an important factor in ensuring the required noise immunity of communication systems. At the same time an important role is played by complexity of realization of this or that method. Among enough «simple» methods it is frequently used an iterative code, for which limiting estimates of corrective capacity and introduced delay are given in this article.
Keywords: noiseless coding, iterative code, codes distance, codeword, coding rate, error probability.
MODULAR PARALLEL SIMULATION MODELING COMPLEX FOR INVESTIGATION OF DATA TRANSMISSION SYSTEMS WITH NOISELESS CODING
S.S. Vladimirov, The Bonch-Bruevich Saint-Petersburg State University of Telecommunications (SPbSUT), department of communication networks and data transmission, associate professor, Ph.D.; vladimirov. email@example.com
O.S. Kognovitsky, The Bonch-Bruevich SPbSUT, department of communication networks and data transmission, professor, Dr.Sci. (Tech.); firstname.lastname@example.org
The issue of constructing a modular software package of parallel simulation modeling of data transmission systems with noiseless coding for use on multi-core computers running POSIX-compatible operating systems is considered. The structure of the complex and project management principles are developed. Individual modules of the software package are implemented in the form of separate program models connected on the basis of named pipes. The estimation of processing speed of the simulation complex in comparison with the one-program architecture of model building is performed.
Keywords: simulation system, simulation modelling, noiseless coding, named pipe.
EVALUATION OF CLUTTER SUPPRESSION FOR DRONE DETECTION RADAR
A.Eu. Ananenkov, MAI, chief of laboratory SC SRS, Ph.D.; email@example.com
D.V. Marin, MAI, deputy chief of laboratory SC SRS; firstname.lastname@example.org
V.M. Nujdin, MAI, department 410, associate professor, Ph.D.; email@example.com
V.V. Rastorguev, MAI, department 410, associate professor, Ph.D.; firstname.lastname@example.org
Ultra short-pulse radar (USPR) is offered to use for detection of small unmanned aerial vehicles (UAV) that flies at low altitude in the city area. Problems of parameters choice for the USPR are considered. Suppression level of clutter caused by reflections from the buildings is evaluated. Analytical evaluation of suppression level for clutter is confirmed by experimental results. The evaluations of specific radar cross-section for different surface types are given. These values can be used for choice of USPR parameters.
Keywords: ultra short-pulse radar, guard mode, small target detection, moving target selection.
A NODE POSITIONING ALGORITHM IN WIRELESS SENSOR NETWORKS BY MEANS OF UNMANNED AERIAL VEHICLE
I.V.Grishin, The Bonch-Bruevich SPbSUT, department of communication networks and data transmission, associate professor, Ph.D.; email@example.com
E.F.Houndonougbo, The Bonch-Bruevich SPbSUT, department of communication networks and data transmission, graduate student; firstname.lastname@example.org
A.V. Shepin, ITMO University, master student; email@example.com
The paper is devoted to finding the coordinates of the nodes of a wireless sensor network by means of optoelectronic reconnaissance performed using unmanned aerial vehicles. The method for calculating of sensor nodes location from aerial photographs is proposed. This method increases the accuracy of positioning of all sensor network sensor nodes. This technique can be used in networks intended for monitoring of environment parameters and in networks deployed in extensive and remote territories.
Keywords: unmanned aerial vehicle, sensor node, positioning.
TWO-CHANNEL PULSE WIDTH MODULATOR
A.V. Glukhov, The Siberian State University of Telecommunications and Informatics (SibSUTI), department of computer-aided design systems (CAD), associate professor, head of the special design bureau of the NZPP, Ph.D.; firstname.lastname@example.org
L.G. Rogulina, SibSUTI, department of radio engineering devices, professor, Dr.Sci.(Tech.); email@example.com
A.M. Sazhnev, SibSUTI, department of radio engineering devices, associate professor, Ph.D.; firstname.lastname@example.org
The paper considers a new schematic design of sawtooth voltage generator for two-cycle PWM modulators of pulsed secondary power supplies. It is proposed to generate a PWM signal proportional to the current of the feedback loop, which changes the angle of the sawtooth voltage on the capacitor. The duration of the PWM signal is determined by the slew rate of the sawtooth until the reference voltage is reached. The results of the simulation showed a reduction in the recovery time of the saw to the value, determined by key speed, and an increase in the linearity of the sawtooth voltage due to stability of the capacitor charging current.
Keywords: shaper, pulse-width modulated signal, feedback current, linearity of sawtooth voltage, capacitor charge.
DETERMINATION OF THE MEDIUM STATIC POWER CONSUMPTION OF MICROLOGIC CHIPS
T.S. Belikova, Don State Technical University (DSTU), department of physics, associate professor, Ph.D.; email@example.com
V.B.Vorzhev, DSTU, department of electrical engineering and electronics, associate professor, Ph.D.; firstname.lastname@example.org
I.V.Kalienko, DSTU, department of radioelectronics, associate professor, Ph.D.; email@example.com
I.A. Osipenko, DSTU, department of physics, associate professor, Ph.D.; firstname.lastname@example.org
K.A.Timolyanov, DSTU, department of physics, assistant; email@example.com
The current issues of measuring the parameters of the consumption current and the power of semiconductor digital logic chips are considered. It is developed the algorithm for determining and calculating parameters when a single chip package contains several logical elements. The results of the experimental studies are presented, the values of the main parameters are obtained. Comparison with known results is made. The obtained algorithm can be extended to cases of digital logic chips containing an arbitrary number of logical elements.
Keywords: logic elements, digital chips, current consumption, average power consumption.
CURRENT POTENTIAL TECHNOLOGICAL OPPORTUNITIES OF TROPOSPHERIC COMMUNICATION IN THE ARCTIC REGION
I.R. Sivakov, JSC Concern Sozvezdie, chief scientific officer, professor, Dr.Sci. (Tech.); firstname.lastname@example.org
I.I. Malyishev, JSC Concern Sozvezdie, advisor to general director, Dr.Sci. (Tech.); email@example.com
N.M. Savoskin, JSC Concern Sozvezdie, head of scientifical and technical department; firstname.lastname@example.org
E.I. Rubtsov, JSC Concern Sozvezdie, head of department; email@example.com
New solutions for increase of range and bandwidth of data transmission in tropospheric radio communication are proposed. The solution is based on modern technologies of broadband signal processing with OFDM+QPSK modulation which allows to significantly reduce the radio link margin (power budget) for fast fading in the radio channel significantly, as well as the modular construction of tropospheric stations. The results of calculation of signal attenuation as a function of distance for various frequencies of microwave and UHF bands are presented.
Keywords: multipath propagation, intersymbol interference, modulation, radio link power budget, radio link margin for fast fading, frequency diversity order, modular construction, communications rate changing platform.
LAYING UNDERWATER FIBER-OPTICAL LINES ALONG RIVER BEDS IN NORTHERN REGIONS OF RUSSIA
S.A. Mamlin, International Telecommunication Academy, fiber-optical lines expert council, chairman; S.A.Mamlin@yandex.ru
The example of a possible design solution for the implementation of the project for the construction of an underwater fiber-optic communication line in the Yamalo-Nenets Autonomous District is given.
Keywords: underwater sea/river telecommunication lines, fiberunderwater optical cable, the Arctic Region, mean time before failure, availability factor.
THE DYNAMIC ADDRESSING PROTOCOL ON CODE MESSAGES FOR UNDERWATER WIRELESS HALFDUPLEX NETWORK OF AUTONOMOUS SENSORS
A.V. Dikarev, Underwater communication and navigation laboratory LLC, R&D director; A. firstname.lastname@example.org
S.M. Dmitriev, Underwater communication and navigation laboratory LLC, engineering director; S. email@example.com
V.A. Kubkin, Underwater communication and navigation laboratory LLC, senior researcher; V. firstname.lastname@example.org
A.P. Abelentsev, Underwater communication and navigation laboratory LLC, CEO; A.email@example.com
The paper presents the new protocol for the organization of dynamic addressing nodes in the underwater wireless network. Due to the extremely limited frequency band and significant delays inherent in the hydroacoustic data transmission channel, as well as the nonlinearity of the propagation paths of the acoustic signal in water, it is proposed the approach to creation of dynamic addressing protocol based on avoiding of collisions at the receiving point. The protocol takes into account the peculiarities of the physical layer of data transmission and is designed for servicing the network of autonomous non-synchronized nodes.
Keywords: underwater wireless network, wireless sensor network, hydroacoustic communication.
RUSSIAN AND INTERNATIONAL TRENDS IN CREATION AND OPERATION OF TELEMEDICINE SYSTEMS
I.A. Sokolov, The Federal Research Center Computer Science and Control of Russian Academy of Sciences, director, Russian Telemedicine Consortium (RTC), executive director, Russian Academy of Sciences, academician; ISokolov@ipiran.ru
M.Ya. Natenzon, The board Research & Production Corporation National Telemedicine Agency, chairman, the board of RTC, member, Ph.D.; firstname.lastname@example.org
V.S. Tsygankov, The Institute of Informatics Problems of the Federal Research Center Computer Science and Control of Russian Academy of Sciences, deputy director, the board of RTC, member; VTsygankov@ipiran.ru
Most of the existing national health systems, including in Russia, were created 100−200 years ago, and therefore now they are confronted with problems that are systemic in nature. Over the past century the social obligations of states, political and economic systems have completely changed. Now we have new medical techniques, technical and organizational solutions. This means that it is not enough just modernization of old healthcare. We must create new health systems based on new technologies and ways of management that appropriate to modern conditions.
Keywords: underwater wireless network, wireless sensor network, hydroacoustic communication.