Rachkov D. Unified systems for interperiod signal processing and parameters estimation in Doppler weather radars with arbitrary sounding principles

Object of investigation – the process of primary interperiod signal processing in Doppler weather radars with arbitrary sounding principles. Goal of the dissertation – to raise the accuracy of basic meteorological formations’ parameters estimation in different signal-and-clutter conditions as well as to reduce the computational complexity of practical implementation of systems for primary interperiod processing of Doppler weather radar signals. Subject of investigation – the methods for primary interperiod processing of Doppler weather radar signals and the methods for estimation of meteorological formations’ energy and Doppler parameters in a background of internal noise of Doppler weather radar receiving channels as well as clutter reflections. Methods – statistical radio engineering, radiolocation theory, probability theory, mathematical statistics, linear algebra, matrix theory, integral and differential calculus, mathematical modeling, scaled-down experiment. Results – a new modification of the well-known pulse-pair method for Doppler weather radars with staggered sounding intervals, which enables to raise to ±0.2 m/s the accuracy of meteorological formations’ velocity estimation and enlarge to ±60 m/s a diapason of meteorological formations’ radial velocity unambiguous estimation; a method for meteorological formations’ spectrum width estimation, which, in contrast to the known methods, employs not two correlation coefficients, but a single Burg’s correlation coefficient averaged over a batch of reflections, which enables to simplify the estimation procedure and to double on average its accuracy; methods for suppression of reflections from ground objects and aerial objects, which enable to achieve a necessary accuracy of meteorological formations’ parameters estimation in clutter conditions; for the first time, for the Doppler weather radars with arbitrary intervals of sounding, it was synthesized a unified system for clutter suppression and meteorological formations’ parameters estimation on a common structural and algorithmic basis of the lattice filters, where all common processing operations are performed only once and associated computational costs are reduced. Implementation – State Enterprise Scientific Research Institute of Radar Systems “Kvant-Radiolokatsiia” (Kyiv), State Enterprise “Scientific and Production Complex “ISKRA” (Zaporizhzhia). Application – Doppler weather radars.