A (sinusodial) carrier wave $c (t) = A_{c} sin ω_{c} t$ amplitude by a (sinusoidal) message signal, $m (t) = A m sin ω_{m} t$ . what is the bandwith of the amplitude modulated signal obtained by superposing $m (t)$ on $c (t)$ ? Draw the amplitude modulated signal obtained by superposing $m (t)$ on $c (t)$ ?

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Solution

The bandwidth of the modulated signal is given by twice the frequency of input message signal.

$B . W = 2 f_{m}$

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