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AR# 32622

LogiCORE Fast Fourier Transform (FFT)v6.0 - Why the latency of later version is more than previous ones


I upgrade my FFT design to the latest version, but the later version needs more clock cycles to get output.

What is the reason for this discrepancy?

Is it possible for me to improve it?


Since version 4.0 of the FFT Core, there was more pipelining due to the introduction of the DSP48s than the previously used MULT18x18. Therefore, there has been a change in the latency. If this is an issue, then it might be necessary to try a different architecture and/or change the parameters.

AR# 32622
Date Created 05/13/2009
Last Updated 12/15/2012
Status Active
Type General Article