SSA of biomedical signals: A linear invariant systems approach
Nuno Figueiredo, Pétia Georgieva, Elmar Wolfgang Lang, Isabel M. Santos, Ana Rita Teixeira, Ana Maria Tomé · Statistics and Its Interface · 2010
Singular spectrum analysis (SSA) is considered from a linear invariant systems perspective.In this terminology, the extracted components are considered as outputs of a linear invariant system which corresponds to finite impulse response (FIR) filters.The number of filters is determined by the embedding dimension.We propose to explicitly define the frequency response of each filter responsible for the selection of informative components.We also introduce a subspace distance measure for clustering subspace models.We illustrate the methodology by analyzing Electroencephalograms (EEG).