Introduction:

The purpose of all efforts modulation is to enable a powerful carrier to deliver through the Air useful information.
Regardless of the process used, these three steps are essential:
                              • Generation of a pure carrier at the transmitter.
                              • Modulated by the carrier this information to be transmitted.
                              • Detection and demodulation of the signal at the receiver, to retrieve.
A large number of different methods used to modulate the signal, but only three items can be modified over time: amplitude, phase and frequency.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The modulation and demodulation is necessary to realize a communication between two users.
The purpose analog modulation is to ensure sufficient quality transmission of analog information (voice, music, and image) within the channel used and the application…