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xilinx_user07

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09-22-2020 04:43 AM

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Registered:
09-20-2020

Half-Band interpolator - non-symmetric in summary

Hi,

I am trying to use Vivado FIR IP to generate a half-band interpolator. The coefficients were provided in .coe file (there are 31 taps). Under filter specification, it shows Inferred Coefficient Structure to be Non-symmetric (I was expecting it be symmetric, since my coefficients are symmetric). Also, though the number of coefficients are 31, in summary tab I see Calculated coefficients to be 32.

Also, I was only able to select Systolic Multiply Accumulate architecture. I am not getting any other option to select.

Can someone let me know as to what I am missing.

Thanks

2 Replies

bruce_karaffa

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09-22-2020 04:54 AM

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06-21-2017

xilinx_user07

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09-22-2020 05:08 AM

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09-20-2020

Thanks.

Since this is a half-band filter it should still see the first polyphase as symmetric filter right? I see in the documentation that IP has a half-band interpolator variant. How can we specify the tool to pick that architecture.