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Participant
Participant
6,551 Views
Registered: ‎05-03-2013

Interpolation FIR vs Interpolated FIR

In the Xilinx FIR compiler there are 2 options for filter type, one is interpolation FIR the other is Interpolated FIR what exactly is the difference and what are the advantages to either. I cannot find any documentation that describes each one independently. The settings seem to not change.

 

2nd question. It's not clear in the documentation about the coeeficients that are used. I'm assuming that they are for the new upsampled frequency? so the Normalized freuency transfer function is of the interpolated sample rate and not of the original sample rate?

 

LD.  

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Xilinx Employee
Xilinx Employee
6,521 Views
Registered: ‎02-06-2013

Re: Interpolation FIR vs Interpolated FIR

Hi

 

Did you looked at ds534 Interpolated FIR Filter section  where it explains about this.

 

The interpolated FIR is a sigle rate system while the interpolation is used in rate change sytems(ie multirate)

There is no inherent rate change when using an interpolated filter – the input rate is

the same as the output rate.

 

Regards,

Satish

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Participant
Participant
6,515 Views
Registered: ‎05-03-2013

Re: Interpolation FIR vs Interpolated FIR

As I stated in the original email Yes I did look at the documentation. 

 

You never really answered the original question. 

 

So, can you tell me : Is the main difference is that one inserts zeros in the coeffecients a0, 0, 0, 0, a1, 0, 0, 0, a2.... ( between each coeffiecient) and the other adds zeros between each data sample? xn, 0, 0, 0, x(n+1), 0, 0, 0,  x(n+2)... Other than that are they the same?

 

Leonard. 

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Visitor
Visitor
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Registered: ‎04-19-2016

Re: Interpolation FIR vs Interpolated FIR

i have the same question .

Is the main difference is that one inserts zeros in the coeffecients a0, 0, 0, 0, a1, 0, 0, 0, a2.... ( between each coeffiecient) and the other adds zeros between each data sample? xn, 0, 0, 0, x(n+1), 0, 0, 0,  x(n+2)... Other than that are they the same?

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