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Table 2 Frequency bands after each level’s decomposition

From: Secured ECG signal transmission for human emotional stress classification in wireless body area networks

Frequency domain {f i }, i [1, 16]

f 1

f 2

……

f 12

f 13

f 14

f 15

f 16

Frequency bands (Hz)

1024–512

512–256

……

0.5–0.25

0.25–0.125

0.125–0.0625

0.0625–0.03125

0.03125–0.01562