UploadFile_6417

336 Chapter 7 FIR FILTER DESIGN
Ideal Impulse Response
Kaiser Window
1
0.2
0.8
hd(n)
0.1
0
w(n)
0.6
0.4
0.2
−0.1
0 20 40 60
n
Actual Impulse Response
0
0 20 40 60
n
Magnitude Response in dB
0
0.2
h(n)
0.1
Decibels
50
0
−0.1
0 20 40 60
n
0 0.2 0.3 1
frequency in π units
FIGURE 7.17 Lowpass filter plots for Example 7.9
□ EXAMPLE 7.10 Let us design the following digital bandpass filter.
lower stopband edge: ω 1s =0.2π, A s =60dB
lower passband edge: ω 1p =0.35π, R p =1dB
upper passband edge: ω 2p =0.65π R p =1dB
upper stopband edge: ω 2s =0.8π A s =60dB
These quantities are shown in Figure 7.18.
1 0 0 0.35 0.35 0.65 0.8 1 ω
π
Decibels
60
FIGURE 7.18 Bandpass filter specifications in Example 7.10
Copyright 2010 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s).
Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.