Description: Modification of the maximum entropy method and Keypon’s method based on the contrast correction of spectral decomposition of the correlation matrix estimation for adaptive antenna array signal processing is considered. The correction of contrast by shifting to the right non-congenital values of eigenvalues of correlation matrix estimation on some constant value is applied. The possibility of such an approach for spatial spectrum analysis of noise sources is shown. The effectiveness of the proposed method by analytical calculation and statistical simulated results of kvazyspectral functions at the antenna array output before and after adjusting the contrast correction of spectral decomposition of correlation matrix estimation in the conditions of the limited spatio-temporal sample amount is illustrated.
Keywords: correlation matrix, adaptive antenna array, the maximum entropy method, Keypon’s method, kvazyspectral functions, spatial spectral analysis