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JordanD's avatar
JordanD
Icon for New Contributor rankNew Contributor
4 years ago

FIR II Decimation Frequency Response

I'm designing a filter with the FIR II IP. Input data rate is 64 MHz and decimation factor is 8. I want the frequency response to be low pass cut off at 3.2 MHz. The confusing thing is whether the ...
CheepinC_altera's avatar
CheepinC_altera
Icon for Regular Contributor rankRegular Contributor
4 years ago

Hi,


Thanks for your help. As I run your latest fir_inspect.m in R2021a, it is passing. However, I come across different observation with yours. As shown in the following screenshot, the left one is I run with your original decim_fir2.zip + latest fir_inspect.m in R2021a only. If I fir_inspect.m in R2021a -> run Modelsim to get new decim_fir_output.txt -> rerun fir_inspect.m in R2021a, I get the right hand side plot. Not sure if I have missed out anything? Thank you.