Amplitude modulation is a modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave. In amplitude modulation, the amplitude of the carrier wave is varied in proportion to that of the message signal, such as an audio signal. 

There are three main types of amplitude modulation. They are;

• Double sideband-suppressed carrier modulation (DSB-SC).
• Single Sideband Modulation (SSB).
• Vestigial Sideband Modulation (VSB).