International Scholarly Research Notices / 2013 / Article / Fig 10

Research Article

Instantaneous Granger Causality with the Hilbert-Huang Transform

Figure 10

ISGC based on the IMF pairs cross-spectrum is computed for each time point. Spectral resolution was set to 0.5 Hz for visualization effects. Positive values of ISGC from time series 1 to 2 at 20 Hz and 8 Hz can be observed until 0.5 seconds and at 20 Hz and 36 Hz from 0.5 to 1 seconds. Spurious causality 2→1 is also present.
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