k

1

2

3

4

5

6

7

Tk

26

23

22

20

18

17

15

Σ(k)sign(dB)

–4

1

0

2

0

–1

3

Yk

20

40

80

160

320

640

1280

| A 1 | 2

0.4

0.4

0.4

0.4

0.4

0.39

0.42