Howtosignalprocessing
- What is the domain of the FFT?
- What is the relationship between FFT and IFFT?
- What is the time domain and frequency domain?
- How does frequency domain work?
What is the domain of the FFT?
An FFT transform deconstructs a time domain representation of a signal into the frequency domain representation to analyze the different frequencies in a signal. The frequency domain is great at showing you if a clean signal in the time domain actually contains cross talk, noise, or jitter.
What is the relationship between FFT and IFFT?
FFT (Fast Fourier Transform) is able to convert a signal from the time domain to the frequency domain. IFFT (Inverse FFT) converts a signal from the frequency domain to the time domain. The FFT of a non-periodic signal will cause the resulting frequency spectrum to suffer from leakage.
What is the time domain and frequency domain?
Put simply, a time-domain graph shows how a signal changes over time, whereas a frequency-domain graph shows how much of the signal lies within each given frequency band over a range of frequencies.
How does frequency domain work?
The Frequency domain works by allowing a representation of the qualitative behavior of a system, as well as characteristics of the way the system response to changes in bandwidth, gain, phase shift, harmonics, etc. A discipline in which the frequency domain is used for graphical representation is in music.
