Pavlikov V. Optimization of ultrawideband signal processing in passive radiometric devices and systems including aperture synthesis systems

The object of research - signal processing in radiometric devices and systems; the aim of research - development of the statistical theory of optimal spatio-temporal signal processing in passive radiometric devices and systems, development of the corresponding methods, algorithms and means of research of their potential and real quality indexes; methods of research - methods of mathematical statistics, the theory of optimal solutions and elements of the functional analysis, the theory of potential accuracy, the spectral and correlation analysis, numerical modeling of the synthesized algorithms and ambiguity functions; results - efficiency of radiometric devices of compensation and modulation types is raised , efficiency of the radiometric spatial distributed systems and systems of aperture synthesis is increased, efficiency of estimation of radiometric images in scanning radiometric devices is increased, the accuracy of an estimation of parameters of radio thermal radiation of the point and spatial distributed objects is increased, resolution of radiometric systems is increased, fluctuation sensitivity of radiometric devices and systems is increased; novelty - the concept of the solution of problems of statistical synthesis of radiometric devices and systems is improved, models of ultrawideband random spatio-temporal signals and noise are improved, the mathematical apparatus of V-transforms was further developed, determination of potential fluctuation sensitivity of radiometric devices and systems for the first time is entered and its estimates for a wide range of radiometric devices and systems substantiated, the theory of synthesis of radiometric devices of compensation type was further developed, the generalized definition of ambiguity function of radiometric devices and systems is entered, for the first time the complex solution of a problem of an estimation of parameters of the point and spatial distributed objects of radio thermal radiation in radiometric devices with the unstable predetection section is substantiated, the statistical theory of optimal estimates of parameters of radio thermal radiation in the multi-element spatial distributed ultrawideband radiometric systems was further developed, ambiguity functions of the multi-element spatial distributed narrow-band, multi-frequency and ultrawideband radiometric systems for the thick, thinned and greatly thinned arrangement of antenna elements for the first time are defined and investigated, quality of formation of primary radiometric images is increased; the degree of implementation - implemented; area - instrumentation.