The location of decimated sample in CIC Decimator?

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Jay
Jay on 14 Dec 2023
Answered: Vinay on 23 Jan 2025 at 8:19
In a CIC Decimator, which sample is chosen among others? For example, here is the original input.
input = [x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12]
With the decimation factor of 4, there are four possiblity choosing the samples;
  • Possibility 1: output = [x1 x5 x9]
  • Possibility 2: output = [x2 x6 x10]
  • Possibility 3: output = [x3 x7 x11]
  • Possibility 4: output = [x4 x8 x12]
In CIC Decimator, which possiblity is used and is there any parameter to choose other possibility?

Answers (1)

Vinay
Vinay on 23 Jan 2025 at 8:19
Hi @Jay,
The 'CIC decimator' downsample the input based on the decimation factor(R) after passing through the cascaded integrators.
Given a decimation factor of 4 the output is given as
I hope this helps!

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