Howtosignalprocessing
- How do you find the frequency spectrum of a signal?
- How do you find the frequency of a square wave?
- What is the FFT of a square wave?
How do you find the frequency spectrum of a signal?
Frequency spectrum of a signal is the range of frequencies contained by a signal. For example, a square wave is shown in Fig. 3.5A. It can be represented by a series of sine waves, S(t) = 4A/π sin(2πft) + 4A/3π sin(2π(3f)t) + 4A/5π sin(2π(5f)t + …)
How do you find the frequency of a square wave?
Here, T is the period of the square wave and f is its frequency, which are related by the equation f = 1/T.
What is the FFT of a square wave?
In the frequency domain, the overall average of a signal is its content at DC or 0Hz -- so that's why there's a peak at 0Hz. The FFT of a square wave that is centered on 0V has energy at every odd harmonic, starting at 1.
