Kolyadenko Y. Space-time signal processing under conditions of the radioreceiving tract nonlinearity .

. The thesis is devoted to problems of improving efficiency of algorithms of controlling adaptive antenna arrays taking into account the influence of the radioreceiving tract nonlinearities. The analysis of the typical nonlinearity of the radioreceiving tract and control channels is performed, and mathematical models of these nonlinearities are worked out. The analysis of the linear algorithms efficiency of signal space-time processing in the presence of typical nonlinearities is performed. The nonlinear algorithms for controlling adaptive antenna arrays are synthesized, which realize four different methods of signal processing. It is shown that under conditions of stationary signal-jamming situation, the reconstruction methods for correlation matrices of inputs can be used. For a changing signal-jamming situation, the method of compensation and signals preliminary deterioration is offered. There are proposed also two algorithms with the use of a Volterra series: rather universal, and adaptive ones. A procedure of the analysis of nonlinear systems with adaptive antenna arrays is improved. The analysis of the proposed algorithms efficiency and stability is carried out. Recommendations for the practical use of the developed algorithms are given.