##  [FFT-Based Spectral Analysis](/fft-based-spectral-analysis) 

  ##  [FFT-Based Spectral Analysis](https://engineering.quantumdictionary.io/fft-based-spectral-analysis-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A signal-processing method that computes a discrete approximation to a signal’s frequency content by applying the fast Fourier transform (FFT) to uniformly sampled time-domain data to obtain a complex spectrum; proper application requires adherence to sampling (Nyquist) constraints, selection of window functions, segment length and overlap to manage leakage and resolution, and appropriate scaling