Techopedia Explains Modulation
Modulation is primarily used in telecommunication technologies that require the transmission of data via electrical signals. It is considered the backbone of data communication because it enables the use of electrical and optical signals as information carriers. Modulation is achieved by altering the periodic waveform or the carrier. This includes carrying its amplitude, frequency and phase. Modulation has three different types:
- Amplitude Modulation (AM): Amplitude of the carrier is modulated.
- Frequency Modulation (FM): Frequency of the carrier is modulated.
- Phase Modulation (PM): Phase of the carrier is modulated.
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