Sparse Fast Fourier Transform, The fasterthanfast Fourier transform 
Sparse Fast Fourier Transform, The fasterthanfast Fourier transform 
Feb 10 2012, 19:55
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#1


Group: Members Posts: 8 Joined: 27November 09 From: Argentina Member No.: 75344 
Hello.
I don't know if this topic was already mentioned here (I wasn't able to find it). Somebody here could find it interesting: MIT news article: The fasterthanfast Fourier transform sFFT web page: sFFT: Sparse Fast Fourier Transform Best regards. Omar 


Sep 22 2012, 16:59
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#2


Group: Members Posts: 42 Joined: 18July 03 Member No.: 7846 
Know next to nothing about maths, but was wondering about the claim for improving battery life. Course, I understand computation uses power and any reduction in the computation needed for a given task reduces the power needed to perform the task.
I'm just wondering if any power savings are expected to be significant in typical consumer uses...phones, tablets etc or in more general scientific and engineering computation? 


Sep 22 2012, 17:30
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#3


Group: Members Posts: 5562 Joined: 2September 02 Member No.: 3264 
I'm just wondering if any power savings are expected to be significant in typical consumer uses...phones, tablets etc or in more general scientific and engineering computation? Probably not. The FFT isn't really the bottleneck in anything consumers do that I can think of. Yes, video and audio codecs often use them, but they're usually only a small part of the entire codec time, and for these applications approximations to the FFT are already available. I didn't look at the math but my guess is that something like this becomes more useful for very large FFT sizes or for more then 1 or 2 dimensional transforms. Science, engineering and maybe telcom applications might be a completely different story though. 


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