Communication Systems and Modulation
Communication systems are essential for the transmission of information over long distances, enabling people to exchange messages, data, and signals reliably. Information is encoded, transmitted, received, and decoded in these systems using a variety of media, including wires, cables, optical fibers, and wireless channels in the form of electronic signals. They are mainly carried out in two different ways:
- Analog signal transmission
- Digital signal transmission
An analogue electronic signal can be represented in to form of either cosine or a sine wave:
m(t) = Amsin(ωmt+θ)
or
m(t) = Amcos(ωmt+θ)
where
- m(t) is the modulating signal
- Am is amplitude of the modulating signal,
- (ωmt+θ) is the phase of the signal
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