The message signal m(t) is given by m(t) = sinc(100t). The message signal is modulated by the carrier cos(2πf c t) where f c = 250Hz to produce a DSB-SC signal, u(t). a) Plot the message signal m(t) and the modulated signal, u(t) using MATLAB. b) Plot the spectrum for the modulated signal, u(t) and the message signal m(t) using MATLAB. c) What’s the bandwidth of the message signal m(t) and the modulated signal, u(t)?

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Frequency Modulation

Frequency modulation is a method or process of encoding the data of a specific signal (analog or digital) by modulating the carrier wave frequency according to the frequency of the modulated signal. Modulated signals are nothing more than information or data that should be conveyed after being converted into electronic signals.