520 Practical MATLAB® Applications for Engineers
[Errors] versus time index n
4
× 10 −^15
2
0
Amplitude
− 2
− 4
01234
time index n
5678
FIGURE 5.33
Error plot of part a with respect to part b of Example 5.6.
FIGURE 5.32
Plots of part b of g(n) and DFT[g(n)] evaluated by circular convolution of Example 5.6.
012345678
012345678
012345678
frequency W
frequency W
Phase of DFT[g(n)] versus W
Magnitude of DFT[g(n)] versus W
Circular convolution g(n)=ifft[DTF(f(n)*DTF(h(n)] versus n
time index n
40
100
50
0
20
Amplitude
Magnitude
Angle in rad.
− 20
0
5
0
− 5