You are using a deprecated Browser. Internet Explorer is no longer supported by Xilinx.
COREGEN - How to implement a 256 point FFT using the 1024 point FFT core
Say you would like to do both a 1024-point and 256-point FFT
in a design. Is there some way to generate only a 1024-point FFT
and use that to implement the 256-point function as well?
If the allowed processing time for the 256 point FFT is at least
twice as long as the transform time for the 1024 point FFT, you can
timeshare the 1024 point function and use it to calculate the 256 point
FFT during every other transform period.
To perform the 256 point FFT calculation using the 1024 point core
you would just need to stuff 3 "0" samples after each of the 256
individual data samples for the 256 point function.