In phase modulation, the amplitude of the modulating signal is used to change the carrier phase from the value it would have if un-modulated. The phase angle of the carrier wave is thus advanced or retarded by some angle, which is proportional to the signal frequency.
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at 6/02/2009 04:27:00 AM
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amplitude of modulating signal,
modulation,
phase,
phase modulation,
un-modulated,
unmodulated
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