System Generator:How to know how many clock cicles are nedeed for the FFT block

clockfftxilinx system generator

I would like to know how many clocks cycles the FFTv4_1 require?
Does anyone know how to determine the required clock cycles? I am using the System Generator 9.2i version.

Thank you so much!

Best Answer

calculating the FFT is not a "FIXED" clock cycle operation. It depends largely on the sample block size and the number of Add/Multiply/Address Fetches are calculated. the FFT algorithm takes care of the ADD/Mutliple/Address Fetching optimization. However, you need to specify the number of samples this is being applied to.