Based on the AM communication system, the envelope demodulation is realized by modulating the baseband signal at the transmitter and detecting the envelope of the modulated signal. Thereby restore that modulated signal.

Amplitude modulation integrates a modulated signal into a high-frequency signal by converting it into the amplitude of a high-frequency signal. And then send a high-frequency signal through an antenna. That is, the modulation signal radiation is completed.

Envelope demodulation, also known as envelope detection, is the process of extracting modulated signals from the envelope of amplitude-modulated waves.

The specific process is:

Firstly, the amplitude modulation structure is corrected to get the pulse caused by the change of envelope structure.