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单词 phase modulation
释义

WordReference Random House Unabridged Dictionary of American English © 2024
phase modula′tion, [Electronics.]
  1. Electronics, Electronicsradio transmission in which the carrier wave is modulated by changing its phase to transmit the amplitude and pitch of the signal.
  • 1925–30

Collins Concise English Dictionary © HarperCollins Publishers::
phase modulation n
  1. a type of modulation, used in communication systems, in which the phase of a radio carrier wave is varied by an amount proportional to the instantaneous amplitude of the modulating signal
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