N.G. Parhomenko

As the result of optimization problem solution for amplitude-phase distribution in multielement antenna array an eigenvector following method is proposed. It increases the energetic efficiency of both classic and «super-resolution» methods of spatial tracking for prior unknown broadband signals with low power spectrum density. In contract to the well-known coherent averaging method the proposed method provides the calculation of principal eigenvector for spatial correlation matrix of single-frequency amplitude-phase distributions that corresponds to the maximum eigenvalue. It is confirmed by the simulation of the circular antenna array and the proposed efficiency comparison criterion for amplitude-phase distribution estimation methods that for the most typical values of the input signal-noise ratio the eigenvector following method exceeds the coherent averaging method by 37 dB while the computational difficulty increases slightly.