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384 Chapter 7 FIR FILTER DESIGN
H r (ω)
4.3
4.0
2.1
1.9
0.05
−0.05
0
0.25 0.45 0.75 1.0
0.2 0.5 0.7
FIGURE P7.4 Filter Specifications for Problem P7.36
ω
π
5. Compare the preceding four design methods in terms of
• the order of the filter
• the exact band-edge frequencies
• the exact tolerances in each band
P7.37 Design a minimum-order linear-phase FIR filter, using the Parks-McClellan algorithm, to
satisfy the requirements given in Figure P7.5. Provide a plot of the amplitude response with
grid-lines as shown in Figure P7.5.
H r (ω)
4.1
4.0
3.1
3.0
2.1
1.9
1.0
0.9
0
0.35 0.5 0.8 1.0
0.3 0.55 0.75
FIGURE P7.5 Filter Specifications for Problem P7.37
ω
π
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