MATLAB SIGNAL PROCESSING TOOLBOX 6 Manual do Utilizador descarregar pdf (Página 47)

Designing Additional Filters

4-9

Designing Additional Filters

You have designed one of the bands of an octave filter bank. This section shows you how

to design and save the other nine bands. The following table defines the parameters for

the remaining bands. Note that all of the bands use these parameters: Bandpass, IIR –

Butterworth , order = 6, Fs = 48000 Hz .

Fc1 Fc2 Filter Name

45 89 Bandpass Butterworth-2

89 178 Bandpass Butterworth-3

178 355 Bandpass Butterworth-4

355 708 Bandpass Butterworth-5

708 1413 Bandpass Butterworth-6

1413 2818 Bandpass Butterworth-7

2818 5623 Bandpass Butterworth-8

5623 11220 Bandpass Butterworth-9

11220 22387 Bandpass Butterworth-10

Using the parameters listed in the table above, for each table row, set the

appropriate the Fc1 and Fc2 values.

Design the filter by clicking the Design Filter button.

Click Store Filter to save the filter.

Change the name to the appropriate filter name shown in the table above.

Repeat these steps until all 10 filters are designed and stored.

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MATLAB SIGNAL PROCESSING TOOLBOX 6 Manual do Utilizador Página 47