Volume 1, Number 1 (2015)
ANALYSIS OF COMPENSATION ALGORITHMS TO THE QAM-64 SIGNAL DISTORTIONS OBSERVED A GAINST THE AWGN AND INTERSYMBOL INTERFERENCE (pp. 3-8)
V.L. Karjakin, D.A. Kalinovsky, D.V. Karjakin
EXPERIMENTAL RESEARCH METHOD OF DIGITAL BROADCASTING IN THE DVB-T2 STANDARD (pp. 9-14)
M. Zhodzishmky, D. Zhodzishmky
MODERN SYSTEMS OF PHASE (TIME) SYNCHRONIZATION AND ASSESSMENT OF NON-ENERGY SIGNAL PARAMETERS IN GPS / GLONASS RECEIVERS (pp. 15-18)
S.A. Nesterenko, V.A. Chulkov
RING PULSE GENERATOR FOR SYNCHRONIZATION SYSTEM (pp. 19-23)
V.N. Kuleshov, T.I. Boldyreva, E.M. Drozdova
REGIME AND NOISE CHARACTERISTICS OF RC-AUTO GENERATORS OF HARMONIOUS OSCILLATIONS (pp. 24-29)
SYNCHRONIZATION SYSTEM OF RECEIVING-TRANSMITTING MODULES OF ACTIVE PHASED ANTENNA ARRAYS (pp. 30-34)
D.V. Kochemasov, V.N. Kuleshov
RESEARCH OF FLUCTUATIONS IN AUTOGENERATORS OF SQUARE OSCILLATIONS (pp. 35-40)
ABSTRACTS & REFERENCES
ANALYSIS OF COMPENSATION ALGORITHMS TO THE QAM-64 SIGNAL DISTORTIONS OBSERVED A GAINST THE AWGNAND INTERSYMBOL INTERFERENCE
Moscow Technical University of Telecommunications and Informatics, Moscow, Russia
Estimation of the stochastic signal parameters against as the Additive White Gaussian Noise (AWGN) as the Intersymbol Interference (ISI) is provided in this research, due to further compensation of the QAM-64 distortions. ISI occurs in the case of mismatch between the signal and the transmission channel and is a cause of the receiving quality degradation. Two approaches is considering in the paper. One of them is the variational algorithm and the other is the nonlinear filtration method. The first one give the advantage to the Signal-Noise Ratio (SNR) in comparison with the nonlinear filtration procedure. For instance, let the SNR=37 dB to the both case, then BER for the variational algorithm is 7 10-3 , while for the second method its value is 2.6 10-2 . The sample volume n=500.
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EXPERIMENTAL RESEARCH METHOD OF DIGITAL BROADCASTING IN THE DVB-T2 STANDARD
V.L. Karjakin, D.A. Kalinovsky, D.V. Karjakin, email@example.com
Volga State University of Telecommunications and Informatics, Samara, Russia
Currently, in experimental studies of second-generation digital broadcasting, the most effective is the use of the ETL analyzer by Rohde & Schwarz (R & S) in remote access mode.
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MODERN SYSTEMS OF PHASE (TIME) SYNCHRONIZATION AND ASSESSMENT OF NON-ENERGY SIGNAL PARAMETERS IN GPS / GLONASS RECEIVERS
Two main interdependent synchronization systems are considered: FAP (phase locked loop) and CVD (delay tracking circuit).
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RING PULSE GENERATOR FOR SYNCHRONIZATION SYSTEM
With the development of systems on a chip, which are becoming more voluminous and fast-acting, the complexity of the circuits of propagation of the synchronization signal in them increases. To eliminate the distortion of synchronization (Clock Skew), PLL systems (PLL – Phase Lock Loop) are used.
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REGIME AND NOISE CHARACTERISTICS OF RC-AUTO GENERATORS OF HARMONIOUS OSCILLATIONS
V.N. Kuleshov, T.I. Boldyreva, E.M. Drozdova, drozdovaEM1989@mail.ru
National Research University “MPEI”, Moscow, Russia
Harmonic oscillation oscillators, in the feedback circuits of which only resistance and capacitance (RC-AG), are widely used in technology. Their properties have been investigated by a number of authors. In many modern applications, the solution to the question of the possibility of using certain types of RC-AG depends on what are the levels of their phase (FM) and amplitude (AM) noise. The works in which the problem of calculating the noise characteristics in the RC-AG was solved related to the analysis of only private systems. In connection with the advent of new generations of RC-AG and new areas of their application, the task of developing a general method for calculating the FM and AM noise of RC-AG, which allows one to compare generators constructed according to different schemes and carry out complex assessments of the capabilities and limitations of various schemes, has become urgent.
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SYNCHRONIZATION SYSTEM OF RECEIVING-TRANSMITTING MODULES OF ACTIVE PHASED ANTENNA ARRAYS
Murom Institute of Vladimir State University named after A.G. and N.G. Stoletovs, Murom, Russia
The use of active phased antenna arrays in radio engineering and infocommunication systems gives new consumer opportunities for managing the tactical and technical characteristics of systems, including adaptive changes in energy potential. One of the main elements of the AFAR is the transmitting and receiving module, which is a complex radio engineering device. To date, a lot of structural PPM schemes have been synthesized, the configuration of which imposes various requirements on radio frequency power and phasing systems.
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RESEARCH OF FLUCTUATIONS IN AUTOGENERATORS OF SQUARE OSCILLATIONS
D.V. Kochemasov, KochemasovDV@gmail.com,
National Research University MPEI, Moscow, Russia
One of the important groups of requirements for quadrature oscillation oscillators is the requirement for their phase noise levels. In most cases, phase noise is caused by the intrinsic noise of active devices that are part of limiter amplifiers, and by the thermal noise of the loss resistances in oscillatory systems.
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