Amplitude modulation

What is AM?

Amplitude Modulation is the done by modulating the Amplitude of an sinoid Carrier signal. The Carrier Signal has usually a higher Frequency than the modulating signal.

An Example

Picture1: Carrier Signal in time domain Picture2: Carrier Signal in frequency domain Picture3: Modulating Signal in time domain Picture4: Modulating Signal in frequency domain

Picture5: Modulated Signal

special kinds of AM

• DSSC, double side band supressed carrier
• SSB, single side band
• residual sideband modulation (modulation used for analog TV applications)
• QAM