Results obtained in model M1 (stochastic broadband signals), using Monte-Carlo simulation for Pearson correlation coefficient (R2), coherence function (CF), nonlinear regression (h2), Hilbert phase entropy (HE), Hilbert mean phase coherence (HR), wavelet phase entropy (WE) and wavelet mean phase coherence (WR), three similarity indexes (S, H, N) and synchronization likelihood (SL). (a) Simulated signals generated by model M1, (b) estimated relationships and (c) variances of estimation.