Sources identification in unknown Gaussian coloured noise with composite HNL statistics
Gaetano Scarano, G. Jacovitti · 1991
The extension of higher order moments based spectral analysis to hybrid nonlinear (HNL) moments is theoretically discussed. It is shown that the structure of the covariance matrix of harmonic processes is retained by HNL moments matrices, thus allowing the use of eigenassisted estimation procedures. The Gaussian components insensitivity of slice cumulants is generalized to a subclass of HNL moments, and a covariance subtraction method for blind rejection of colored noise is proposed. Simulation results confirm the applicability of such a procedure for bearings estimation in array processing schemes.>