Investigations in radar technologies in Lviv Polytechnic National University

For estimation of radar imaging system potential properties, the first-order problem is the image formation as a direct task formulation taking into account the objects' scattering, properties of medium and technical means. The character of the information signal formation on the system's receiver output determines further selection of distortion removal, filtration, interpolation and extrapolation, compression, feature extraction, and spectral estimation methods, i.e. methods of inverse problem solution, and structure of the whole system with certain tactical and technical characteristics. The problem of image formation can be solved by methods: by means of active and passive location. In the case of active system image forming consists of electromagnetic energy radiation in the determined direction and the reception of radio waves reflected from the objects. Passive systems use their own radiation of the investigated objects. Investigations in the improvement and development of new radar technologies based on methods of active and passive location are intensively performed. The results of investigation related with radar and radiometry imaging systems that are carried out at the Lviv Polytechnic National University are presented.