Cardiorespiratory Dynamic Response to Mental Stress: A Multivariate Time-Frequency Analysis

Figure 4

Averaged instantaneous power of the two spectral components of 𝑥₁(𝑡) in simulation study 2 of 𝑆₁₁(𝑡,𝑓), 𝑆_𝑥𝑥(𝑡,𝑓), and 𝑆_𝑥𝑥/2(𝑡,𝑓). (a) component 1 of 𝑥₁(𝑡), which corresponds to the sinusoidal component; (b) component 2 of 𝑥₁(𝑡), which corresponds to the linear component.

(a)

(b)