# hw5 discussion (ECE438BoutinFall09)

For the 5120 point FFT, can we downsample it by a factor of 5 to 1024 points? and then interpolate the FFT to get the 5120 points?

- That's a very creative idea. The question is whether the interpolation gives the same as the original DFT. --Mboutin 15:11, 8 October 2009 (UTC)
- I guess not :( .
- Do you think it might be possible in some circumstances? Can we make assumptions about the signal that would guarantee it is possible? --Mboutin 08:53, 9 October 2009 (UTC)