Why are only the filter coefficients of the first section of a filter returned when I try to export all the filter coefficients in FDATool in Filter Design Toolbox 2.5 (R13SP1)?

1 view (last 30 days)
Why are only the filter coefficients of the first section of a filter returned when I try to export all the filter coefficients in FDATool in Filter Design Toolbox 2.5 (R13SP1)?
I designed an IIR Elliptic Bandpass filter using FDATool. The filter has a Direct Form II, second-order-sections structure.
I then turned the quantization on.
Finally I go to "File->Export" to export the filter coefficients to a text file. In the text file, I only see the filter coefficients of the first section.

Accepted Answer

MathWorks Support Team
MathWorks Support Team on 27 Jun 2009
This is a bug in Filter Design Toolbox 2.5 (R13SP1) in the way that FDATool handles exporting filter coefficients. It was fixed in Filter Design Toolbox 3.0 (R14).
To work around this issue in Filter Design Toolbox 2.5 (R13SP1) and before, convert the filter structure to Single Section before exporting filter coefficients.

More Answers (0)

Products


Release

R13SP1

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!