What is FFT?
Fourier transformation (FFT - Fast Fourier Transform) is an effective algorithm to calculate discrete Fourier transformation (DFT), helping to analyze signals into frequency components.
Rarely can a toanistic algorithm shape the entire modern technology framework. But the Fourier Quick Transformation algorithm has done it.
Founded more than 60 years ago, FFT is still a platform for countless applications, from artificial intelligence (AI), 5G network, video streaming, to CT scans in medicine.
Before FFT, engineers must rely on discrete Fourier transformations (DFT), both slow and memory. In 1964, mathematician John Tukey (Princeton University) and researcher James Cooley (IBM) introduced FFT, helping to analyze signals into frequencies hundreds of times faster.
The invention was immediately considered a turning point, opening up the previously seemingly impossible ability to process data.
What makes FFT so important?
In the 1960s, the world was trying to decode hidden data in signals, from sound waves, earthquake waves to electronic signals. The FFT was originally applied to a temporary mission such as detecting underground nuclear testing as required by the US President John F. Kennedy's Scientific Advisory Committee.
Thanks to this algorithm, seismic measuring devices can detect nuclear activity thousands of kilometers away.
FFT's key principle is to move signals from the time zone to the frequency zone, turning complex data into simple, easy-to-use blocks.
Thanks to that, systems can save time, reduce memory costs and increase accuracy. This platform has helped us to filter noise in sound, compress video, transmit high-speed wireless signals, or recreate sharp medical images through CT scans.
Today, FFT is still present in the core of many of the most advanced technologies: from AI, autonomous vehicles, quantum computing to new-generation telecommunications networks.
seemingly obvious applications such as online video calling, digital broadcasting or real-time data downloading will not be able to survive without this algorithm.
The FFT story is also a testament to the strength of cooperation between academia and industry. From the joint efforts of Princeton and IBM, Cooley and Tukey's work has been honored with many international awards.
On the occasion of its 60th anniversary, the world's largest technical professional organization IEEE (Institute of Electrical and Electronics Engineers) recognized FFT as a historic milestone, affirming its lasting heritage, that clear ideas, combined with a spirit of cooperation, can shape the entire technology era.
