How can I obtain the quantized filter coefficients as fixed-point objects in Filter Design Toolbox 4.0 (R2006b)?

Technical Source
1 min readDec 28, 2021

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I create a filter using the FDATOOL or through command line functionality and would like the coefficients returned as fixed-point objects.

NOTE:-

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The ability to obtain the quantized filter coefficients as fixed-point objects is not available in the Filter Design Toolbox 4.0 (R2006b).

To work around this you can manually convert the coefficients to fixed-point objects as shown below:

d=fdesign.lowpass(0.40,0.54,0.05,50);hd=design(d,'kaiserwin','filterstructure','dffir');hd.Arithmetic='fixed';set(hd,'filterInternals','specifyprecision');hd.productWordLength = 16;hd.accumwordLength = 40;

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Technical Source
Technical Source

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