Table of Contents
Fast Fourier Transform (FFT) is a mathematical algorithm used to convert signals from the time domain to the frequency domain. It is widely used in data analysis, signal processing, and engineering to analyze the frequency components of signals efficiently.
Basics of FFT
FFT is an optimized version of the Discrete Fourier Transform (DFT). It reduces the computational complexity from O(n^2) to O(n log n), making it suitable for real-time applications and large datasets.
How FFT Works
The algorithm divides a signal into smaller parts, computes the DFT of these parts, and combines the results to produce the overall frequency spectrum. This process involves recursive splitting and combining steps that exploit symmetries in the data.
Applications of FFT
FFT is used in various fields, including:
- Audio signal processing
- Image analysis
- Wireless communications
- Vibration analysis
- Medical imaging