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    Wyświetlanie 1-11 z 11
    Tytuł:
    A method of feature selection in the aspect of specific identification of radar signals
    Autorzy:
    Dudczyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/200837.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    radar emitter recognition
    RER
    specific emitter identification
    SEI
    minimum distance classification
    ELINT system
    klasyfikator minimalnej odległości
    System ELINT
    Opis:
    This article presents an important task of classification, i.e. mapping surfaces which separate patterns in feature space in the scope of radar emitter recognition (RER) and classification. Assigning a tested radar to a particular class is based on defining its location from the discriminating areas. In order to carry out the classification process, it is necessary to define metrics in the feature space as it is essential to estimate the distance of a classified radar from the centre of the class. The method presented in this article is based on extraction and selection of distinctive features, which can be received in the process of specific emitter identification (SEI) of radar signals, and on the minimum distance classification. The author suggests a RER system which consists of a few independent channels. The task of each channel is to calculate the distance of the tested radar from a given class and finally, set the correct identification coefficient for each recognized radar. Thus, a multichannel system with independent distance measurement is obtained, which makes it possible to recognize particular radar copies. This system is implemented in electronic intelligence (ELINT) system and tested in real battlefield conditions.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 1; 113-119
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of the Modular Integrator for Soldier’s C4I System Management on the Battlefield
    Modułowy Integrator do zarządzania systemem C4I żołnierza
    Autorzy:
    Dudczyk, J.
    Przanowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/403853.pdf
    Data publikacji:
    2017
    Wydawca:
    Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
    Tematy:
    functional polymorphism
    Modular Integrator
    C4I system
    polimorfizm funkcjonalny
    Modułowy Integrator
    system C4I
    Opis:
    The C4I (Command, Control, Communications, Computers and Intelligence) system is the integral part of soldier’s Individual Combat System. This subsystem establishes new standards by providing soldiers with supporting information and therefore improving their knowledge. For that reason, the C4I system integrates all radio, electronic and optoelectronic & IT components, which are a part of the soldiers equipment. The C4I system ensures exchange of data, imagery, and audio between its users and elements of its environment. For the above functionality to be implemented, the C4I subsystem needs a device which will integrate the above-mentioned functionality in its configuration. The Modular Integrator is this kind of device. This paper describes the design and the functionality of the Modular Integrator used for soldier’s C4I system management. The paper focuses on the design of the device and on the set of functions it can perform in the C4I system. An innovative concept, involving integration of three separate devices in a single enclosure, i.e. a personal radio, a portable digital assistant and a mobile phone with a power supply system allows the Modular Integrator to be referred to as a device with “functional multiformity”. A key aspect of the project implementation was also the adaptation of the device to psychological & physical attributes of its future users. This adaptation was accomplished through evaluation of the Modular Integrator in terms of ergonomics, technical aesthetics, anthropometrics and customization, user interaction, pressure force, thermal comfort and lateralization. This “3-in-1” researched and tested solution, developed to the 9th technology readiness level, has no match on national and on international markets.
    Integralnym elementem Indywidualnego Systemu Walki żołnierza jest podsystem C4I. Podsystem ten, wprowadza nową jakość jaką jest wsparcie żołnierza w informacje, a tym samym w wiedzę. Z tego powodu C4I integruje wszystkie elementy radiowe, elektroniczne oraz optoelektroniczne i informatyczne będące na wyposażeniu żołnierza oraz zapewnia wymianę danych, obrazów i fonii pomiędzy użytkownikiem i elementami jego otoczenia. Aby powyższe funkcje mogły być realizowane, podsystem C4I musi zawierać w swojej konfiguracji urządzenie, które zintegruje opisane wyżej funkcjonalności. Takim urządzaniem jest Modułowy Integrator. Niniejszy artykuł opisuje projekt budowy oraz funkcjonalność Modułowego Integratora do zarządzania systemem C4I żołnierza. W artykule zwrócono szczególną uwagę na budowę tego urządzenia oraz zbiór funkcji jakie urządzenie to realizuje w podsystemie C4I. Innowacyjny pomysł polegający na integracji w pojedynczej obudowie trzech różnych urządzeń, tj.: radiostacji osobistej, przenośnego komputera osobistego oraz systemu zasilania, realizowany na IX poziomie gotowości technologii, pozwolił określić Modułowy Integrator mianem urządzenia o „funkcjonalnej wielopostaciowości”. Kluczowym aspektem realizacji projektu było również dostosowanie urządzenia do cech psychofizycznych przyszłych użytkowników. Powyższe dostosowanie zostało zrealizowane poprzez ocenę Modułowego Integratora w aspektach ergonomii, estetyki technicznej, antropometrii i personalizacji, interakcji z użytkownikiem, siły nacisku, komfortu termicznego oraz lateralizacji. Opracowane, przebadane oraz przetestowane rozwiązanie „3 in 1” nie ma swojego odpowiednika na rynku krajowym jak i na rynkach zagranicznych.
    Źródło:
    Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa; 2017, 8, 2 (28); 9-18
    2081-5891
    Pojawia się w:
    Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fractal Features of Specific Emitter Identification
    Autorzy:
    Dudczyk, J.
    Kawalec, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1177363.pdf
    Data publikacji:
    2013-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.30.Sy
    47.54.-r
    43.60.Lq
    Opis:
    This article presents the issues connected with emitter sources identification with low distinctive primary features of a signal. It is a specific type of identification called specific emitter identification, which distinguishes different copies of the same type of emitter. The term of specific emitter identification was presented on the basis of fractal features received from the transformation of measurement data sets. The use of linear regression and Lagrange polynomial interpolation resulted in the estimation of measurement function. The method analysing properties of measurement function which was suggested by the authors caused the extraction of two additional distinctive features. The features above extended the vector of basic radar signals' parameters. The extended vector of radar signals' features made it possible to identify the copy of emitter source.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 3; 406-409
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fast-decision identification algorithm of emission source pattern in database
    Autorzy:
    Dudczyk, J.
    Kawalec, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/199845.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Fast-decision Identification Algorithm
    Specific Emitter Identification
    Emitter Pattern
    database
    superheterodyne ELINT receiver
    baza danych
    superheterodynowy odbiornik ELINT
    algorytm FdIA
    Opis:
    This article presents Fast-decision Identification Algorithm (FdIA) of Source Emission (SE) in DataBase (DB). The aim of this identification process is to define signal vector (V) in the form of distinctive features of this signal which is received in the process of its measurement. Superheterodyne ELectronic INTelligence (ELINT) receiver in the measure procedure was used. The next step in identification process is comparison vector with pattern in DB and calculation of decision function. The aim of decision function is to evaluate similarity degree between vector and pattern. Identification process mentioned above differentiates copies of radar of the same type which is a special test challenge defined as Specific Emitter Identification (SEI). The authors of this method drew up FdIA and three-stage parameterization by the implementation of three different ways of defining the degree of similarity between vector and pattern (called ’Compare procedure’). The algorithm was tested on hundreds of signal vectors coming from over a dozen copies of radars of the same type. Fast-decision Identification Algorithm which was drawn up and implemented makes it possible to create Knowledge Base which is an integral part of Expert DataBase. As a result, the amount of the ambiguity of decisions in the process of Source Emission Identification is minimized.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 2; 385-389
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimizing the minimum cost flow algorithm for the phase unwrapping process in SAR radar
    Autorzy:
    Dudczyk, J.
    Kawalec, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/200190.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    IFSAR
    Interferometry Synthetic Aperture Radar
    minimum cost flow
    MCF
    phase unwrapping
    PhU
    Opis:
    The last three decades have been abundant in various solutions to the problem of Phase Unwrapping in a SAR radar. Basically, all the existing techniques of Phase Unwrapping are based on the assumption that it is possible to determine discrete ”derivatives” of the unwrapped phase. In this case a discrete derivative of the unwrapped phase means a phase difference (phase gradient) between the adjacent pixels if the absolute value of this difference is less than π. The unwrapped phase can be reconstructed from these discrete derivatives by adding a constant multiple of 2π. These methods differ in that the above hypothesis may be false in some image points. Therefore, discrete derivatives determining the unwrapped phase will be discontinuous, which means they will not form an irrotational vector field. Methods utilising branch-cuts unwrap the phase by summing up specific discrete partial derivatives of the unwrapped phase along a path. Such an approach enables internally cohesive results to be obtained. Possible summing paths are limited by branch-cuts, which must not be intersected. These branch-cuts connect local discontinuities of discrete partial derivatives. The authors of this paper performed parametrization of the Minimum Cost Flow algorithm by changing the parameter determining the size of a tile, into which the input image is divided, and changing the extent of overlapping of two adjacent tiles. It was the basis for determining the optimum (in terms of minimum Phase Unwrapping time) performance of the Minimum Cost Flow algorithm in the aspect of those parameters.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 3; 511-516
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Specific emitter identification based on graphical representation of the distribution of radar signal parameters
    Autorzy:
    Dudczyk, J.
    Kawalec, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/200468.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Specific Emitter Identification
    SEI
    radar recognition
    ELINT system
    Electronics Warfare System
    EWS
    radar
    system ELINT
    system EWS
    Opis:
    The article presents some possibilities of same type radar copies identification with the use of graphical representation. The procedure described by the authors is based on transformation and analysis of basic parameters distribution which are measured by the radar signal especially Pulse Repetition Interval. A radar intercept receiver passively collects incoming pulse samples from a number of unknown emitters. Information such as Pulse Repetition Interval, Angle of Arrival, Pulse Width, Radio Frequency and Doppler shifts are not usable. The most important objectives are to determine the number of emitters present and classify incoming pulses according to emitters. To classify radar emitters and precisely identification the copy of the same type of an emitter source in surrounding environment, we need to explore the detailed structure i.e. intra-pulse information, unintentional radiated electromagnetic emission and fractal features of a radar signal. An emitter has its own signal structure. This part of radar signal analysis is called Specific Emitter Identification. Utilization of some specific properties of electronic devices can cause heightening probability of a correct identification.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 2; 391-396
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of emitter sources in the aspect of their fractal features
    Autorzy:
    Dudczyk, J.
    Kawalec, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/200415.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fractal feature
    pattern of radar
    signal processing
    Specific Emitter Identification (SEI)
    Opis:
    This article presents the procedure of identification radar emitter sources with the trace distinctive features of original signal with the use of fractal features. It is a specific kind of identification called Specific Emitter Identification, where as a result of using transformations, which change measure points, a transformation attractor was received. The use of linear regression and the Lagrange polynomial interpolation resulted in the estimation of the measurement function. The method analysing properties of the measurement function which has been suggested by the authors caused the extraction of two additional distinctive features. These features extended the vector of basic radar signals’ parameters. The extended vector of radar signals’ features made it possible to identify the copy of radar emitter source.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 3; 623-628
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Applying the relational modelling and knowledge-based techniques to the emitter database design
    Autorzy:
    Dudczyk, J.
    Matuszewski, J.
    Wnuk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/309249.pdf
    Data publikacji:
    2003
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    bazy danych
    sieć semantyczna
    modelowanie relacyjne
    emitter database
    relational modelling
    knowledge-based-techniques
    semantic networks
    confidence factor
    Opis:
    The appropriate emitter database is one of the most important elements in the present electronic intelligence (ELINT) system. This paper provides an overview of the relational modelling, which is used to construct the emitter database for current ELINT systems. The method described, delivers the entities' relational diagram that is independent from the manner of the data storage in further process of implementation. This approach ensures the integrity of the measured data. The process of final emitter identification is based on "the knowledge-based approach" which was implemented during the process of constructing the database.
    Źródło:
    Journal of Telecommunications and Information Technology; 2003, 1; 51-54
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Applying the radiated emission to the specific emitter identification
    Autorzy:
    Dudczyk, J.
    Wnuk, M.
    Matuszewski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/309391.pdf
    Data publikacji:
    2005
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    radiated emission
    distance function
    homology function
    measurement and signature intelligence
    specific emitter identification
    Opis:
    During the last years we have observed fast development of the electronic devices and electronic warfare systems (EW). One of the most principal functions of the ESM/ELINT system is gathering basic information from the entire electromagnetic spectrum and its analysis. Simultaneously, utilization of some tools of artificial intelligence (AI) during the process of emitter identification is very important too. A significant role is played by measurement and signature intelligence (MASINT) based on non-intentional emission (calls-radiated emission). This emission is a source of knowledge about an analysed emitter due to its incidental "chemical", "spectral" traces and non-communication emitter's characteristics. The process of specific emitter identification (SEI) based on extraction of distinctive radiated emission features is presented by the authors. Specially important is utilization of a database (DB) in the process of identifying a detectable radar emission.
    Źródło:
    Journal of Telecommunications and Information Technology; 2005, 2; 57-60
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie promieniowania pozapasmowego w specyficznej identyfikacji źródeł emisji
    Radiated emission approach to specific emitter identification
    Autorzy:
    Dudczyk, J.
    Wnuk, M.
    Różański, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/208366.pdf
    Data publikacji:
    2006
    Wydawca:
    Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
    Tematy:
    radiolokacja
    kompatybilność elektromagnetyczna
    rozpoznanie
    radar
    electromagnetic compatibility
    recognition
    Opis:
    Jedną z podstawowych funkcji nowoczesnego systemu ESM/ELINT jest zdobywanie i gromadzenie informacji o rozpoznawanym źródle emisji oraz ich analiza. W ostatnich latach w państwach NATO obserwuje się szybki rozwój urządzeń i systemów walki radioelektronicznej (WRE). Znaczącą rolę zaczyna odgrywać rozpoznanie sygnaturowe MASINT (ang. Measurement and Signature Intelligence), które wykorzystuje niezamierzone emisje uboczne obiektów, tzw. "ślady" spektralne, chemiczne lub częstotliwościowe. Proces specyficznej identyfikacji emiterów SEI (ang. Specific Emitter Identification), bazujący na wykorzystaniu cech dystynktywnych (ekstrahowanych z promieniowania pozapasmowego), został zaprezentowany w niniejszym artykule. Szczególnie istotnym elementem jest zastosowanie bazy danych podczas procesu identyfikacji źródeł emisji elektromagnetycznej [4].
    One of the most principal functions of the ESM/ELINT system is gathering basic information from the entire electromagnetic spectrum and its analysis. A significant role plays Measurement and Signature Intelligence (MASINT) based on non-intentional emission (called - radiated emission). This emission is a source of knowledge about an analysed emitter due to its incidental "chemical", "spectral" traces, and non-communication emitter's characteristics. The process of Specific Emitter Identification (SEI) based on extraction of distinctive radiated emission features is presented here. Especially important is utilization of a database (DB) in the process of identifying a detectable radar emission (Ref. 4).
    Źródło:
    Biuletyn Wojskowej Akademii Technicznej; 2006, 55, sp.; 135-153
    1234-5865
    Pojawia się w:
    Biuletyn Wojskowej Akademii Technicznej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A correction in feedback loop applied to two-axis gimbal stabilization
    Autorzy:
    Wrońska-Zych, A.
    Dudczyk, J.
    Kawalec, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/202421.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    gimbal stabilization
    feedback loops
    Kalman filter
    kardanowa stabilizacja
    pętla sprzężenia zwrotnego
    filtr Kalmana
    Opis:
    A two-axis gimbal system can be used for stabilizing platform equipped with observation system like cameras or different measurement units. The most important advantageous of using a gimbal stabilization is a possibility to provide not disturbed information or data from a measurement unit. This disturbance can proceed from external working conditions. The described stabilization algorithm of a gimbal system bases on a regulator with a feedback loop. Steering parameters are calculated from quaternion transformation angular velocities received from gyroscopes. This data are fed into the input of Proportional Integral Derivative (PID) controller. Their input signal is compared with earned value in the feedback loop. The paper presents the way of increasing the position’s accuracy by getting it in the feedback loop. The data fusion from a positioning sensor and a gyroscope results in much better accuracy of stabilization.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 1; 217--219
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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