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problems about filter design using fir compiler v9.1

Altera_Forum
Honored Contributor II
‎06-17-2011 02:01 AM
1,350 Views

Hi !  

 

I have designed a filter in MATLAB with the fixed coefficients, and simulink is pass ，meet the requirements。So export the fixed coefficients to fir compiler v9.1 , set the Structure Type to Fully Parallel Filter。 When run in FPGA，the results of filter output is different from matlab , Error will increase when the data is large. 

 

thanks for reply
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Altera_Forum
Honored Contributor II
‎06-22-2011 11:03 AM
600 Views

Hello, 

 

What are your filter settings? (coefficient bitwidth, scaling, output bitwidth etc.) 

 

Grt, 

Olaf
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Altera_Forum
Honored Contributor II
‎06-23-2011 12:47 AM
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Hi， Olaf 

The coefficient has been exported fir compiler v9.1 , So I set scaling options for "none" ，the same as MATLab。 output bitwidth is 

“full solution”。
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Altera_Forum
Honored Contributor II
‎06-27-2011 11:11 AM
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Did you check the errata for the fir compiler? perhaps this is a known issue and already has a workaround..

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