Howtosignalprocessing
- What are some differences between the time domain and the frequency domain?
- What is amplitude in frequency domain?
- Why frequency domain is better than the time domain for signal analysis?
- How a time domain graph of unbalance can be converted into frequency domain?
What are some differences between the time domain and the frequency domain?
A time-domain graph shows how a signal changes with time, whereas a frequency-domain graph shows how much of the signal lies within each given frequency band over a range of frequencies.
What is amplitude in frequency domain?
In the frequency domain, amplitude modulation corresponds to translating the baseband spectrum to a band surrounding the carrier frequency. Because the baseband spectrum is symmetrical with respect to the y-axis, this frequency translation results in a factor-of-2 increase in bandwidth.
Why frequency domain is better than the time domain for signal analysis?
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.
How a time domain graph of unbalance can be converted into frequency domain?
To convert a time domain signal into frequency domain, one must use the Fourier transform to do so. MATLAB has a function fft which is a Fast Fourier Transform algorithm designed to implement the Fourier Transform on digital signals.
