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- Dictionaryphase modulation
noun
- 1. variation of the phase of a radio or other wave as a means of carrying information such as an audio signal.
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noun
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Phase modulation (PM) is a modulation pattern for conditioning communication signals for transmission. It encodes a message signal as variations in the instantaneous phase of a carrier wave. Phase modulation is one of the two principal forms of angle modulation, together with frequency modulation. Wikipedia