Signal Processing Toolbox - Designfilt doesn't have 'window' in 'DesignMethod'

Alvin Nguyen

2015 12 27

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I tried several code using Window but all failed because of the error

'window' is an invalid design method for

Here are some example code. Also, the filter design assistant doesn't have Window in DesignMethod. I am using Matlab 2015b with Signal Processing Toolbox and DSP System Toolbox installed

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Frantz Bouchereau 2016-1-13

Alvin, the particular design you are choosing only supports a Kaiser window design. This is the reason why the window parameter input is invalid. See also how the filter design assistant offers a 'Kaiser Window' design option.

Hope this helps,

Frantz

Frantz Bouchereau 2016-1-13

The design method name you are using is incorrect, here is a correct call for this particular filter design:

designfilt('bandpassfir', 'StopbandFrequency1', .35, 'PassbandFrequency1', .45, 'PassbandFrequency2', .55, 'StopbandFrequency2', .65, 'StopbandAttenuation1', 60, 'PassbandRipple', 1, 'StopbandAttenuation2', 60, 'DesignMethod', 'kaiserwin');

Frantz

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