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AR# 39011

LogiCORE Fast Fourier Transform (FFT) v7.0/v7.1/v8.0 - Why do I get LSB mismatches between the C-Model and IP implementation for streaming architecture?

Description

Why for the LogiCORE Fast Fourier Transform (FFT) v7.0, v7.1 or v8.0 do I get LSB mismatches between the C-Model and IP implementation for streaming architecture?

Solution

There was a rare issue discovered where the streaming architecture with rounding could give a mismatch in the LSBs, depending on what the maxpoint size for a variable point size FFT was.

To work around this issue, see (Xilinx Answer 39329).

Please see (Xilinx Answer 29209) for a detailed list of LogiCORE Fast Fourier Transform (FFT) Release Notes and Known Issues.




AR# 39011
Date Created 11/10/2010
Last Updated 12/01/2010
Status Active
Type Known Issues
IP
  • Fast Fourier Transform