−1 × 2
15
2
15
− 1
2
n
1
/4
−∞
−∞
+∞
1
/4
1
/4
1
/16.88
29
◦
84.2
◦
22
◦
82.9
◦
80
◦
71.6
◦
181.22
◦
α = 0.6
tukey(x) =
1
2
(1 + cos(
π(|x −
N −1
2
| − α
N −1
2
)
(1 − α)
N −1
2
))
hann[x] =
1
2
(1 − cos(
2π(x + 1)
n + 1
))
flattop(x) = 0.21557895 − 0.41663158 cos(2π
x
n − 1
) + 0.277263158 cos(4π
x
n − 1
)
−0.083578947 cos(6π
x
n − 1
) + 0.006947368 cos(8π
x
n − 1
)
hamming[x] = 0.54 − 0.46 cos(
2πx
n − 1
)
p
| |
β(3, 3)
2
β(16, 2)
⁄