Research
What is the fast Fourier transform?
The Fast Fourier Transform (FFT) is a computationally efficient algorithm that converts time-domain signals into their frequency-domain representation, reducing computational complexity from O(n²) to
The Fast Fourier Transform (FFT) is a computationally efficient algorithm that converts time-domain signals into their frequency-domain representation, reducing computational complexity from O(n²) to O(n log n). It is widely used in signal processing, image analysis, audio compression, and other applications requiring frequency analysis. The IBM Research article explains both the mathematical principles behind FFT and its practical applications in modern computing.
Source: IBM Research | 2026-06-05