Binary data @2.4 Mb/s Multinary baseband encoding Carrier modulator Modulated output Consider the system above with a multinary carrier modulation scheme. The symbol rate is chosen to transmit data at 2.4 Mbit/s, so the symbol rate is chosen accordingly. The baseband encoding uses full-width rectangular NRZ pulses. (a) If the modulator generates an M-ASK signal, what is the bandwidth of the modulated output? (b) If the modulator generates an M-PSK signal, what is the bandwidth of the modulated output? (c) If the modulator generates a QAM signal with M levels for I and M levels for Q, what is the bandwidth of the modulated output?

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Amplitude modulation

A radio signal can carry information in the form of sound or image for broadcasting or communication. For it to be sent to a greater distance, the signal must be changed or modulated in some way. One of the easiest way is to change the amplitude of the signal with variations of the video or the audio signal. This is called Amplitude Modulaton. In this modulation information of message is carried in amplitude of carrier signal.