Wykaz obszarów badawczych związanych z tagiem Radar:
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1)Methods of detection and classification of heart abnormalities using deep learning techniques - concerns techniques and algorithms for processing ECG signals for automatic detection and classification of heart abnormalities using deep machine learning methods. It is planned to use a variety of deep convolutional neural networks for automatic analysis of the structure (waveform) of ECG signals, as well as mechanisms for detecting anomalies (deviations) and searching for information based on autoencoder neural networks. The work will be carried out in cooperation with the Department of Cardiology-Intensive Therapy and Internal Diseases of the Medical University of Karol Marcinkowski in Poznań. 2)Methods of detection and classification of heart abnormalities using heart rate variability (HRV) parameters and machine learning techniques - concerns techniques and algorithms for processing ECG signals for automatic detection and classification of heart abnormalities using machine learning methods. It is planned to use a wide variety of heart rate variability (HRV) parameters as well as new original heart rate asymmetry (HRA) parameters. The work will be carried out in cooperation with the Department of Cardiology-Intensive Therapy and Internal Diseases of the Medical University of Karol Marcinkowski in Poznań. 3)Passive radar for space object detection using signals recorded by antennas of the international network of radio telescopes LOFAR - The research area concerns the techniques and algorithms for processing signals recorded by the antennas of the network of radio telescopes LOFAR (Low-Frequency Array for radio astronomy) in order to use them for passive radiolocation of space objects: satellites in low orbits and so-called space debris. The considered system of passive radiolocation does not require the construction of dedicated transmitters, but uses the existing so-called illuminators of opportunity, e.g. FM, DAB + or TV DVB-T transmitters. After reflecting the signals from the objects, they are received by the antennas of the LOFAR system. The research in this area, carried out in cooperation with the Space Research Center of the Polish Academy of Sciences, is pioneering on a global scale. Three LOFAR stations are located in Poland. A single LOFAR station consists of many antennas creating a large radio telescope that can receive relatively weak signals. 4) Methods and algorithms for signal processing in passive radar for small unmanned aerial vehicles (drones) - concerns techniques and algorithms for signal processing dedicated to the passive radiolocation of small unmanned aerial vehicles (drones). The work will be carried out in cooperation with the Faculty of Power and Aeronautical Engineering of the Warsaw University of Technology at the airport in Sieraków near Przasnysz, recently purchased by the Warsaw University of Technology, where the Area Monitoring Laboratory with four antenna stations was built. Problems to be solved within the research area are related to detection of small flying objects with the use of specific features of signals reflected from the considered objects, estimation of their parameters, tracking, as well as classification of detected objects, in particular, the research is to focus on the possibility of distinguishing small drones from birds. 5) Optimization of methods and algorithms of people identification based on the EEG signal with the use of machine learning techniques - concerns the methods and algorithms of people identification based on the EEG signal with the use of machine learning techniques. It is planned to use the approach based both on the spectral features of the EEG signal in its individual bands, as well as the analysis of the EEG signal itself using the so-called deep learning techniques with convolutional neural networks. The work will include the selection and optimization of EEG signal parameters and classifiers used to identify people, the number of sessions necessary to train classifiers, the minimum number of electrodes used for identification, as well as the development of headbands/caps dedicated to collecting the EEG signal for the application under consideration, and testing the developed solutions under the conditions similar to their practical implementation. The research will be carried out in cooperation with the Nencki Institute of Experimental Biology of the Polish Academy of Sciences.
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Research Area of the Research Group on Radar Imaging Techniques, lead by dra hab. inż. Piotr Samczyński, prof. WUT, specializes in digital signal processing for the creation of two-dimensional (2D) and three-dimensional (3D) radar images using the synthetic aperture technique (SAR – Synthetic Aperture Radar) and the inverse SAR technique (ISAR – Inverse SAR). This research team has developed a number of demonstrators of radar technologies, both active and passive SAR / ISAR, covering a wide spectrum of operating frequencies, from low VHF through the C, X, K and W bands and ending with sub-millimeter bands (THz). Other areas of research also include: signal processing in multi-band active-passive radar systems, recognition of radar signal signatures, radio-targeting of radio-communication and radar emissions, and radio-electronic warfare techniques.
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Processing of SAR radar images with particular emphasis on the phenomenon of radar speckle. Research in this area can be conducted in two main directions. The first is the study of the possibility of using selected image processing methods to remove speckle: an analysis of the effectiveness of the existing solutions and a proposal of innovative ones, based on e.g. classic methods of adaptive filtration, morphological filtration, multi-temporal (or, generally: multi-look) filtration, but also methods of machine learning, including convolutional neural networks. The second of the above-mentioned fields is the study of the significance of the phenomenon of radar speckle for the classification of the content of radar images and the development of a methodology allowing to maximize its effectiveness - with the specification of the procedure for dealing with the phenomenon of speckle.
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The use of SAR radar images in land use/land cover classification in selected fields, including: topographic objects, built-up areas, farmlands, etc. The analysis of the suitability of selected types of SAR data in terms of e.g. spatial resolution and polarization. Investigation of the possibility of using SAR radar images to conduct geospatial analyzes such as population density, etc.
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The use of artificial intelligence methods for detection, tracking and target recognition in radar. Nowadays, artificial intelligence methods are used in more and more different fields. One of them is radar. The classic approach to radar uses methods and algorithms for the detection, tracking and recognition of targets that have been known for decades. Usually, under certain conditions, these solutions provide optimality in a certain sense. In reality, these conditions are often not met, leading to undesired results. The use of artificial intelligence methods may, in certain situations, lead to results that are difficult to obtain with classical methods. As part of this research area, the PhD student will deal with the application of artificial intelligence methods where up to date classic approaches used in radar have been used.
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Opis obszaru badawczego
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Opis obszaru badawczego
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