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Hi Kaz,
The code:
H_comp = [H_comp H_comp H_comp H_comp];
Does this line of code return the frequency response of the compensation FIR filter, performing additional decimation by 2?
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Not exactly. The frequency response of compensation filter is the line of freqz.
Then I interpolated it back by 4 in the frequency domain (by repeating 4 copies) in order to compare it (and multiply) with cic filter at same Fs
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Do you know how to calculate the impulse response of this decimat-by-2 FIR filter?
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impulse response is just:
plot(h_comp);
if you mean frequency response of impulse input then it is the freqz line.
The z domain approach can also be used for both filters and overall system.
Honored Contributor
