Amplitude Modulation (AM) Mathematical Derivation
Modulation definition:
Modulation is the process by which some characteristic (amplitude, frequency, or phase) of the carrier is changed according to amplitude of the input (baseband signal). In case of voice signal, the value of amplitude depends on the LOUDENESS. The more loudly we speak, more the amplitude value.
- In Amplitude Modulation (AM), amplitude of the carrier is changed in accordance with amplitude of modulating signal.
- In Frequency Modulation (FM), frequency of the carrier is changed in accordance with amplitude of modulating signal.
- In Phase Modulation (PM), phase of the carrier is changed in accordance with amplitude of modulating signal.
- Transmitter modifies the message signal in order to transport information easily from one place to other. This modification is called modulation.
- During this process, Low Frequency (LF) signal changes the High Frequency (HF) signal.
- By modulation, baseband signal is translated from Low Frequency (LF) to High Frequency (HF).
- Modulation is the process of adding carrier to modulating signal. Demodulation is the process of removing carrier from modulating signal.
