Howtosignalprocessing
- Why is the frequency domain preferred over the time domain?
- What is difference between time domain and frequency domain?
- How do you convert time domain to frequency domain?
- What is frequency domain representation?
Why is the frequency domain preferred over the time domain?
The frequency domain representation of a signal allows you to observe several characteristics of the signal that are either not easy to see, or not visible at all when you look at the signal in the time domain. For instance, frequency-domain analysis becomes useful when you are looking for cyclic behavior of a signal.
What is difference between 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 do you convert time domain to frequency domain?
Relationship between the Time Domain and Frequency Domain
Thus, given the signal x(t) and the unit impulse response h(t), one can either directly calculate the response y(t) via convolution in the time domain, or one can apply the Fourier transform to x(t) and y(t) to move into the Fourier domain.
What is frequency domain representation?
The frequency domain representation of a periodic signal is a line spectrum. It can only have non-zero values at DC, the fundamental frequency, and harmonics of the fundamental. Because periodic signals have no beginning or end, non-zero periodic signals have infinite energy but generally have finite power.
