Estimates the power spectral densities (PSDs) using the EB method with q = 0 for deciding the diagonal loading.

Estimates the power spectral densities (PSDs) using both the ICOMP method and Mallows CL for deciding the diagonal loading.-Estimates the power spectral densities (PSDs) using both the ICOMP method and Mallows CL for deciding the diagonal loading.

Estimates the power spectral densities (PSDs) using the ML-based empirical Bayes method for deciding the diagonal loading.

Estimates the power spectral densities (PSDs) using both the generalized Ridge Regression (GRR) method [Hoerl, Kennard] and the ordinary RR method with loading level decided by the harmonic mean (HKB) and a Bayesian estimator (LW) for deciding the di