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decimation in time - butterfly

Started by bos1234 May 15, 2010
is there a method to memorise the butterfly? If anyone has any tricks? or
how does the butterfly diagram come about??

need it for a exam
On May 15, 3:48=A0pm, "bos1234" <suren130@n_o_s_p_a_m.gmail.com> wrote:
> is there a method to memorise the butterfly? If anyone has any tricks? or > how does the butterfly diagram come about?? > > need it for a exam
It's just a two point DFT. Once you have it you can work out what the signal-flow looks like. Hardy