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Implement filter that cannot be normed to a(1) = 1

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Joschua Kraus
Joschua Kraus 2018-5-14
关闭： MATLAB Answer Bot 2021-8-20
Hi, I am aware of the following method of implementing a filter:
numerator = [2 1 1] ;
denominator = [1 2 2 2];
y = filter(signal, numerator, denominator);
The filter transfer function would look like this:
But how is the following filter being implemented?
ATTENTION: I DID NOT MEAN TO WRITE Z^-4 BUT Z^4 I'M VERY SORRY FOR THE CONFUSION
My take: -> The first part is essentially a delay so multiply the signal with 2 and delay it 4 counts (how do I do that?) then apply the filter as said to the signal. Is my line of thinking correct? How would you apply the delay?

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回答（1 个）

Honglei Chen
Honglei Chen 2018-5-14
You will pad 4 zeros in front of numerator.
HTH
  2 个评论
Joschua Kraus
Joschua Kraus 2018-5-15
Now I got your point, please see the edit to my question in bold letters!

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