Terms Related to Amplitude Modulation

Following terms are related to amplitude modulation:

Carrier Wave

A carrier wave is a pure wave of constant frequency analogous to a sine wave of electronic signal. It doesn’t carry much information itself that we can relate to (such as speech or data).

Modulating Signal

To include speech information or data information to the carrier wave which can be interpreted, another wave needs to be imposed, called an input signal, on top of the carrier wave. This input signal is known as the modulating signal.

Modulation

Modulation is defined as the process of superimposing a low-frequency signal which is coined as the input signal or modulating signal on a high-frequency carrier signal whose data or speech needs to be interpreted.

Amplitude Phase

Amplitude is the maximum distance from the center line to the peak; phase, on the other hand, tells us where any particle in a periodic waveform is located and frequency is the number of waves passing through a given point in a second.

Amplitude modulation alters the carrier wave’s magnitude to convey information, which is then restored at the receiver to interpret the message.
In contrast, Frequency modulation adjusts the carrier wave’s frequency, allowing data and speech information to be transmitted via frequency changes.
Similarly, phase modulation varies the carrier wave’s phase to convey data and speech information. Each modulation technique offers unique methods for encoding and transmitting information

Amplitude Modulation – Definition, Types, Expression

Amplitude Modulation or AM, is a modulation technology mainly used for radio carrier wave-based message transmission which modifies the carrier wave’s amplitude (signal intensity) in accordance with the message signal, such as an audio signal, i.e., a modulating signal.

In this article, we will learn what amplitude modulation is, its definition, historical overview, equations to explain the process , its applications in telecommunication, and some related methodologies. We will also solve some numerical problems based on amplitude modulation and attempt to answer FAQs regarding this topic