Сучасні проблеми радіоелектроніки, телекомунікацій, комп'ютерної інженерії
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Item Improved solution of cramer-rao lower bound for TOA/RSS localization(Видавництво Львівської політехніки, 2012) Holotyak, Taras; Voloshynovskiy, Svyatoslav; Rolim, Jose; Prudyus, IvanIn this paper the problem of evaluation of bound accuracy for (he range based localization techniques in the wireless sensor networks is considered. The comprehensive analysis of the existing solution of the Cramer-Rao lower bound problem for the anchored localization based on (be time of arrival or relative signal strength principles shows certain discrepancy between analytical solution and simulation results. Therefore, new bound for this problem using more accurate stochastic modeling of localization error is proposed.Item Gaussian wiretap channel with collaborative wiretappers(Видавництво Львівської політехніки, 2012) Voloshynovskiy, Svyatoslav; Holotyak, Taras; Prudyus, IvanIn this paper, we consider the compound wiretap channel with collaborative wiretappers. Contrarily to [1], where the wiretappers act independently, we analyze the setup when the wiretappers form a coalition, which shares the observed data within the coalition. The goal of coalition consists in learning the secret message communicated to the legitimate user by sharing their observations to produce the best possible estimate thus benefiting from available redundancy. We analyze the secrecy capacity for the Gaussian data and correlated observations. As the result, we provide the estimate of the impact of coalition of wiretappers on reduction of secrecy capacity.Item Identification with privacy protection based on data hiding(Видавництво Львівської політехніки, 2012) Holotyak, Taras; Voloshynovskiy, Svyatoslav; Prudyus, IvanIn many problems such as biometrics, multimedia search and retrieval, recommendation systems requiring privacy preserving similarity computations and identification, some binary features are stored in the public domain or outsourced to the third parties that might raise certain privacy concerns about the original data. To avoid this privacy leak, privacy protection is used. In the most cases, the privacy protection is uniformly applied to all binary features resulting in the data degradation and corresponding loss of performance. To avoid this undesirable effect we propose a new privacy amplification technique that is based on data hiding principles and benefits from side information about bit reliability a.k.a. soft fingerprinting. In this paper, we investigate the identification rate vs. privacy-leak trade off. The analysis is performed for the case of perfect match between the side information shared between the encoder and decoder as well as for the case of partial side information.Item Object separation based on the multispectral monitoring data(Видавництво Львівської політехніки, 2012) Prudyus, Ivan; Lazko, Leonid; Mymrikov, DmytroIn this paper the approach to usage multispectral monitoring data for object separation and clasification are given.Item Monopulse-frequency temporal processing of unknown signals based on LFM - fourier transform in passive systems radiomonitoring(Видавництво Львівської політехніки, 2012) Antonyuk, Volodymyr; Kalyuzhniy, Mykola; Prudyus, Ivan; Nichoha, VitalijPrinciples of combination of dispersive-time and digital signal processing methods in problems of identification, evaluation parameters, recognition and identification of complex signals and means that they emit.Item The detector of warmly isolation condition defects with an independent supply(Видавництво Львівської політехніки, 2012) Prudyus, Ivan; Kril, Jaroslav; Storozh, Volodymyr; Turkinov, Gennadiy; Shkliarskyi, VolodymyrWays of construction of the detector of warmly isolation condition defects of heating systems DD1 are considered. The detector of defects DD1 is intended for the remote control and monitoring of a technical condition of warmly isolation of heating systems by measurement of impedance between an alarm wire and a surface of a steel pipe of a heating system. The impedance gives the information on a condition of a heating system.Item Research of the discrete frequency-modulated signals properties(Видавництво Львівської політехніки, 2012) Kuzyk, Andrii; Prudyus, Ivan; Sumyk, MarkiyanThe given results of design of compound signals are with the discrete change of frequency. It is analyzed influence of some parameter of р on cross-correlation and frequency properties of RF pulse signals with the different amount of frequency steps. The ambiguity function are got for the different parameters of discrete FM signals.Item Nanoluminescense a scanning optical microscope for research of functioning of microorganisms under influence of low temperatures(Видавництво Львівської політехніки, 2012) Prudyus, Ivan; Shkliarskyi, Volodymyr; Zaichenko, Aleksandr; Palianycia, Lubov; Pedan, AnatolijThe ways of a nanoluminescent scanning optical microscope (NSOM) construction for the microorganisms functioning research under the low temperatures influence are considered.Item Scanning television optical microscope for research of biological microobjects(Видавництво Львівської політехніки, 2010) Balanjuk, Yurij; Lubinecka, Bogdana; Matiieshyn, Yurij; Pedan, Anatoliy; Prudyus, Ivan; Turkinov, Gennadiy; Shkliarskyi, VolodymyrWays of construction of a scanning television microscope which can be used for research of biological microobjects are analyzed. Opportunities of a microscope are expanded due to formation of a raster in television and little-frame mode. Ways of change of the size of a raster are offered at preservation of the resolution of the image of microobject.Item Information aspects of multispectral active-passive radio monitoring system(Видавництво Львівської політехніки, 2010) Zubkov, Anatoliy; Prudyus, Ivan; Diakov, Andriy; Mymrikov, DmytroMethodology for structural-functional construction of multispectral radio monitoring system by the criterion of information efficiency is proposed. Requirements to the main elements of the structure are determined.