Independent Component Analysis and Blind Source Separation - Biomedical Signal Analysis: Contemporary Methods and Applications - page 105

(a) sources
(b) mixtures
(c) estimated sources
Figure 4.3
Use of ICA for performing BSS. (a) shows the three source signals, which were
linearly mixed to give mixture signal as shown (b). We separated these signals using
FastICA (see section 4.5). When comparing the estimated sources (c) with the
original ones, we observe that they have been recovered very well. Here, we have
manually chosen signs and order for visual purposes; in general the sign cannot be
recovered — it is part of the ICA indeterminacies (see section 4.2).