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en.wikipedia.org/wiki/Fast_Fourier_transform
Fast Fourier transforms are widely used for many applications in engineering, ... What is the lower bound on the complexity of fast Fourier transform algorithms?

en.wikipedia.org/wiki/Fourier_transform
The Fourier transform decomposes a function of time (a signal) into the frequencies that make it up, similarly to how a musical chord can be expressed as the ...

mathworld.wolfram.com/FastFourierTransform.html
Fast Fourier Transform. The fast Fourier transform (FFT) is a discrete Fourier transform algorithm which reduces the number of computations needed for points from to ...

hyperphysics.phyastr.gsu.edu/hbase/Math/fft.html
Fast Fourier Transforms. ... The fast Fourier transform is a mathematical method for transforming a function of time into a function of frequency.

www.amazon.com/FourierTransformsEditionAdvancedMathematics/dp/0849371635
Fast Fourier Transforms, Second Edition (Studies in Advanced Mathematics) [James S. Walker] on Amazon.com. *FREE* shipping on qualifying offers. This new edition of ...

www.tek.com/fft
Fast Fourier Transform (FFT) and Discrete Fourier Transform (DFT) algorithms can be a challenge if you don’t work with them every day. Our FFT Study Guide is a one ...

paulbourke.net/miscellaneous/dft
Appendix A. DFT (Discrete Fourier Transform) ... Fast Fourier Transforms and Convolution Algorithms Nussbaumer, H.J. Springer, New York, 1982 Digital Signal Processing

www.dspguide.com/ch12.htm
Chapter 12: The Fast Fourier Transform. There are several ways to calculate the Discrete Fourier Transform (DFT), such as solving simultaneous linear equations or the ...

news.mit.edu/2012/fasterfouriertransforms0118
The Fourier transform is one of the most fundamental concepts in the information sciences. It’s a method for representing an irregular signal — such as the ...

www.intmath.com/fourierseries/7fastfouriertransformfft.php
7. Application  The Fast Fourier Transform 1. Digital Audio. Pulse code modulation (PCM) is the most common type of digital audio recording, used to make compact ...