Modulation Explanations and Matlab Code
2016-08-23
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One way to communicate a message signal whose frequency spectrum does not fall
within that fixed frequency range, or one that is otherwise unsuitable for the channel, is to
change a transmittable signal according to the information in the message signal. This
alteration is called modulation, and it is the modulated signal that is transmitted. The
receiver then recovers the original signal through a process called demodulation.
Modulation is a process by which a carrier signal is altered according to information in a
message signal. The carrier frequency, denoted Fc, is the frequency of the carrier signal.
The sampling rate, Fs, is the rate at which the message signal is sampled during the
simulation.
The frequency of the carrier signal is usually much greater than the highest frequency of
the input message signal. The Nyquist sampling theorem requires that the simulation
sampling rate Fs be greater than two ti
within that fixed frequency range, or one that is otherwise unsuitable for the channel, is to
change a transmittable signal according to the information in the message signal. This
alteration is called modulation, and it is the modulated signal that is transmitted. The
receiver then recovers the original signal through a process called demodulation.
Modulation is a process by which a carrier signal is altered according to information in a
message signal. The carrier frequency, denoted Fc, is the frequency of the carrier signal.
The sampling rate, Fs, is the rate at which the message signal is sampled during the
simulation.
The frequency of the carrier signal is usually much greater than the highest frequency of
the input message signal. The Nyquist sampling theorem requires that the simulation
sampling rate Fs be greater than two ti
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