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Altera_Forum
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11 years ago

CIC compensation filers (FIR)

Hi All, Can I please have the Matlab code for the Solution 2: Multi-stage decimation in "Understanding CIC compensation filers" (Altera booklet)? I have attached this document. This matlab code...
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Altera_Forum
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11 years ago

Hi Kaz,

Yes. But the fir compensation filter only compensates the cic filter which does the decimation by 4. The compensation filter did not do the additional decimation by 2. You can tell that by checking the repeating points on the plot of the fir filter, which has 22.8MHz output sampling frequency. How to do this additional decimation by 2 using the same compensation filter so the total decimation rate is 8 (4*2)? The fir ouput sampling frequency should be 11.4MHz.

Thanks a lot,

Lee