Digital Signal Processing Reference
In-Depth Information
1
1
0
0
−1
−1
0
10
20
30
0
10
20
30
(a) n, Original Sig
(b) n, Sum(IFFT) to Bins +/− 3
0.5
0.5
0
0
−0.5
−0.5
0
10
20
30
0
10
20
30
(c) n, Re(x
3
[n])
(d) n, Im(x
3
[n])
0.5
0.5
0
0
−0.5
−0.5
0
10
20
30
0
10
20
30
(e) n, Re(x
−3
[n])
(f) n, Im(x
−3
[n])
Figure 3.49:
(a) Original signal; (b) Cumulative reconstructed signal, to Bin 3; (c) and (d): Real and
Imaginary parts of Weighted IDFT basis vector (or harmonic) for
k
= 3; (e) and (f ): Real and Imaginary
parts of Weighted IDFT basis vector (or harmonic) for
k
= -3.
1
1
0
0
−1
−1
0
10
20
30
0
10
20
30
(a) n, Original Sig
(b) n, Sum(IFFT) to Bins +/− 15
0.5
0.5
0
0
−0.5
−0.5
0
10
20
30
0
10
20
30
(c) n, Re(x
15
[n])
(d) n, Im(x
15
[n])
0.5
0.5
0
0
−0.5
−0.5
0
10
20
30
0
10
20
30
(e) n, Re(x
−15
[n])
(f) n, Im(x
−15
[n])
Figure 3.50:
(a) Original signal; (b) Cumulative reconstructed signal, to Frequency/Bin 15; (c) and (d):
Real and Imaginary parts of Weighted IDFT basis vector (or harmonic) for
k
= 15; (e) and (f ): Real and
Imaginary parts of Weighted IDFT basis vector (or harmonic) for
k
= -15.
