Common Spatio-Time-Frequency Patterns for Motor Imagery-Based Brain Machine Interfaces

Figure 3

Time patterns as the time windows of the source signals ((a)–(d)) and the designed time windows ((e)–(h)). The horizontal axis represents time and its unit is the second.

(a) 1st source, 𝑠₁

(b) 2nd source, 𝑠₂

(c) 3rd source, 𝑠₃

(d) 4th source, 𝑠₄

(e) 1st window, 𝐛₁

(f) 2nd window, 𝐛₂

(g) 3rd window, 𝐛₃

(h) 4th window, 𝐛₄