Volume 2, Number 4 (2016)
ANALYSIS OF COMPENSATION ALGORITHMS TO THE QAM-64 SIGNAL DISTORTIONS OBSERVED A GAINST THE AWGN AND INTERSYMBOL INTERFERENCE (pp. 3-8)
G.V. Kuzmin, A.A. Kuchumov, V.S. Priputin
A METHOD OF SPATIALLY POLARIZATION SIGNAL PROCESSING (pp. 9-15)
V.A. Ivanov, D.V. Ivanov, N.V. Ryabova, M.I. Ryabova, A.A. Chernov, A.A. Kislitsin
STUDY OF COHERENCE STRIP IN TRANSIONOSPHERIC SOUNDING (pp. 16-20)
V.A. Ivanov, D.V. Ivanov, N.V. Ryabova, M.I. Ryabova, A.A. Chernov, V.V. Ovchinnikov
PRIMARY PROCESSING OF OBLIQUE SOUNDING IONOGRAMS OF HF IONOSPHERIC RADIO CHANNEL BASED ON LABVIEW (pp. 21-26)
D.M. Solovyev, Е.А. Skorohodov
COMPUTING RESOURCES OPTIMIZATION OF THE MULTIPATH FADING CHANEL SIMULATOR (pp. 27-32)
M.S. Tokar, A.L. Makarevich
ANALYSIS OF EFFECTIVE METHODS FOR INFORMATION TRANSFER MULTI-ANTENNA RADIO SYSTEMS (pp. 33-38)
ABSTRACTS & REFERENCES
ANALYSIS OF COMPENSATION ALGORITHMS TO THE QAM-64 SIGNAL DISTORTIONS OBSERVED A GAINST THE AWGN AND INTERSYMBOL INTERFERENCE
N.E. Poborchaya, firstname.lastname@example.org,
Moscow Technical University of Radio and Communications, 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 x 10-3 , while for the second method its value is 2.6 x 10-2 . The sample volume n=500.
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A METHOD OF SPATIALLY POLARIZATION SIGNAL PROCESSING
G.V. Kuzmin, A.A. Kuchumov, V.S. Priputin, email@example.com,
Moscow Technical University of Communications and Informatics, Moscow, Russia
Modern radiomonitoring systems operate in a complex electronic environment situation related with intensive development of radio communications equipment, radar and radio. It has resulted to that in limited space on the same or adjacent frequency range simultaneously operating multiple wireless systems of various purposes. There are a number of different methods spatially polarization signal processing for improving noise immunity of radio systems by increasing the resulting signal-to-interference ratio. Unfortunately these methods used a priory knowledge of the signal and interference parameters, topology and characteristics of antenna array. These data are unknown, or are subject to change under operating conditions. In this paper we proposed a new method for spatially-polarization signal processing based on the fourth order statistics. Method work under assumptions of unknown signal and interference parameters, topology and characteristics of antenna array. According to the results of the simulation can be said that the proposed method can effectively suppress interference arrival direction which is close to the direction of arrival of information (interested) signal.
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STUDY OF COHERENCE STRIP IN TRANSIONOSPHERIC SOUNDING
V.A. Ivanov, D.V. Ivanov, N.V. Ryabova, M.I. Ryabova, A.A. Chernov, A.A. Kislitsin,
firstname.lastname@example.org, Volga State University of Technology, Yoshkar Ola, Russia
The technique for the study of dispersion distortions signals at through ionosphere. On the basis of the simulated values of the total electron content obtained results of calculations of the dispersion characteristics, its inclination and coherence bandwidth.
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2. Ivanov D.V., Ivanov V.A., Lashchevsky A.R. The study of the dispersion of ultra-wideband decameter radio channels and the correction of dispersion distortions. III All-Russian Scientific Conference “Ultra-wideband signals in radar, communications and acoustics.” Murom. 2010, pp. 7-16.
PRIMARY PROCESSING OF OBLIQUE SOUNDING IONOGRAMS OF HF IONOSPHERIC RADIO CHANNEL BASED ON LABVIEW
V.A. Ivanov, D.V. Ivanov, N.V. Ryabova, M.I. Ryabova, A.A. Chernov, V.V. Ovchinnikov,
email@example.com, Volga State University of Technology, Yoshkar Ola, Russia
The results of primary processing of oblique sounding ionograms of HF ionospheric radio channel using software environment Labview are presented. It was found that the cleaning ionogram be carried out in several stages. As a final step you can use median filtering along the tracks, or a modified method of filtering single emissions.
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4. Ivanov D.V., Ivanov V.A., Ryabova N.V., Yelsukov A.A. et al. SDR ionosonde with continuous chirp signal on the USRP platform. Bulletin of the Volga State Technological University. Ser .: Radio engineering and infocommunication systems. 2013. No. 3 (19), pp. 80-93.
COMPUTING RESOURCES OPTIMIZATION OF THE MULTIPATH FADING CHANEL SIMULATOR
This paper presents method of computing resources optimization of the real-time multipath fading channel simulator. This method reduces computing complexity of simulator and allows implementing it on existing hardware (e.g. field-programmable gate arrays). The optimization criterion is also proposed.
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ANALYSIS OF EFFECTIVE METHODS FOR INFORMATION TRANSFER MULTI-ANTENNA RADIO SYSTEMS
M.S. Tokar, firstname.lastname@example.org, A.L. Makarevich, email@example.com,
Ministry of Regional Development, Transport and Communications of the Pridnestrovian Moldavian Republic;
Pridnestrovian State University of Taras Shevchenko, Tiraspol, Pridnestrovian Moldavian Republic
The article describes basic data methods in today’s fixed and mobile radio communication systems using multi-antenna techniques, use of which allows reliability augmentation of data transmission. The results of simulation methods in the software package MATLAB are given appropriate comparative evaluation and ways of further research are set out.
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