Kupriy V. The radio waves propagation adaptation of the antenna arrays used for radio sources direction finding with spectral analysis methods

The object is process of a time-space signal processing in antenna arrays, used at a direction-finding, of radio sources (RS )by methods of spectral analysis. The purpose is efficiency enhancement (resolving capability and accuracy) of RS in medium with varying electrodynamics parameters by adaptation of devices of angular spectral analysis to radio wave propagation (RWP) conditions. The methods of antenna statistical theory, statistical radioengineering and radar adaptation theory of information systems, probability theory and mathematical statistics, linear algebra, matrix analysis, radio system simulation. The main novelty is the first time the analytic dependence of errors estimation of angular data of RS by eigenstructure algorithm from statistical characteristics of fluctuations of amplitude-phase distribution (APD) in the received signals in superresolution mode is obtained; the algorithms of antenna array adaptation to distortions of APD in the received signals conditioned by RWP environment are improved; for the first time a possibility and a efficiency of sequential application of proposed adaptation algorithm to RWP conditions and angular superresolution algorithms on time interval restricted by correlation time of RWP environment parameters, is showed; for the first time the errors of direction finding of RS, by spectral methods are estimated in conditions when the fluctuations of RWP parameters are different in direction of each of sources. The results - the statistical characteristics of compensation accuracy of APD distortions of received signals by adaptation algorithm based on Newton method are obtained; the possibility when using the modern digital devices, sequentially in time realise the algorithms of direction finding device adaptation to conditions of RWP and angular superresokution is showed; the limiting values of APD fluctuations of signals passed through nonuniform environment under which ones the direction finding accuracy remaines in predetermined limits The sphere of application is data processing.