Digital Signal Processing Reference
In-Depth Information
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(a) Normalized Frequency
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(b) Normalized Frequency
(c) Normalized Frequency
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(d) Normalized Frequency
Figure 3.35:
(a) DTFT magnitude of a cosine wave of length 2ˆ14 and frequency 2000; (b) DTFT
magnitude of a length-2ˆ14 rectangular window having only 11 contiguous, central values of 1.0 with all
other values equal to 0; (c) A zoomed-in view of part of (b); (d) Frequency response of the windowed
cosine sequence, i.e., the magnitude of the circular convolution of the DTFTs at (a) and (b).
LVDTF TWindowsOnly(64)
LVDTF TWindowing(64)
to view a sequence of about 15 different windows. The number in parentheses is the number of samples
in the window, and you may change that number when calling the script(s).
3.17.5 DF T LEAKAGE V. WINDOW TYPE
You may run the script (see exercises below)
LV xWindowingDisplay(NoiseAmp,freq
1
,freq
2
)
which was used to generate the plots associated with this section of text. The arguments are as follows:
NoiseAmp
is an amount of noise,
freq
1 and
freq
2 are frequencies that are immersed in the noise and
