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Example 5.18
We
have an audio signal with a BW of 4 KHz. What is the BW needed, if we
modulate
the
signal using AM?
Solution:
-AM signal
requires twice the BW of original signal
-BW = 2 * 4 KHz
= 8 KHz
ƒ Frequency Modulation (FM)
o Frequency
of carrier signal
is changed according
to the amplitude
of
modulating
signal
o Amplitude and Phase of the carrier signal
remain constant
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