Using Time Deformation to Filter Nonstationary Time Series with Multiple Time-Frequency Structures

Figure 7

(a) Sketch of upper and lower Wigner-Ville curves for Example 4 showing 𝑓_𝑐𝑔(𝑡) for 𝑓_𝑐=0.13 and 𝑔(𝑡) given in (6); (b) sketch of Wigner-Ville curves in dual space; (c) sketch of upper and lower Wigner-Ville curves for Example 4 showing 𝑓_𝑐𝑔(𝑡) for 𝑓_𝑐=0.13 and 𝑔(𝑡) given in (7); (d) sketch of Wigner-Ville curves in dual space.

(a)  𝜆=1.7

(b) Dual plot for (a)

(c) 𝜆=2

(d) Dual plot for (c)