Sine Wave in Frequency Domain

A complete sine wave in the time domain can be represented by one single spike in the frequency domain.


The time-domain and frequency-domain plots of a sine wave



A single-frequency sine wave is not useful in data communication. We need to send a composite signal, a signal composed of many simple sine waves.
According to Fourier analysis, any composite signal is a combination of simple sine waves with different frequencies, amplitudes and phases.


A composite periodic signal





Decomposition of a composite periodic signal in the time and frequency domain











          Only at Engineer's Knowledge

             © Copyright Sajid Baloch

9 thoughts on “Sine Wave in Frequency Domain

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