Amplitude Modulation (am)
Definition - What does Amplitude Modulation (am) mean?
Amplitude Modulation is a modulation technique that is used in electronic communication for the transmission of information through a radio carrier wave. In it, the carrier never fluctuates itself. Instead, the modulating data can be found in signal components at frequencies slightly lower or higher than that of the carrier. High frequency waves use small antennas to more efficiently utilize the available bandwidth. Higher frequency waves can carry different types of data because of their flexibility.
Petropedia explains Amplitude Modulation (am)
Amplitude Modulation is the most preferred method used for modulating a carrier. The simplest form used is the on-off keying. In this form, the carrier is simply turned on or off. This is the basic type of modulation that was used in the early days of wireless communication. The amplitude of the complete signal is different in line with the varied incoming audio signals or other modulating signals.
To transmit audio signals directly, an antenna is required for around 10,000 km. Modulation techniques can be divided into two – digital modulation or analog modulation. Amplitude modulation is a type of analog modulation.