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位相変調
1. PM; phase modulation
2. Phase modulationPhase modulation (PM) is a form of modulation that represents information as variations in the instantaneous phase of a carrier wave. Unlike its more popular counterpart, frequency modulation (FM), PM is not very widely used for radio transmissions. This is because it tends to require more complex receiving hardware and there can be ambiguity problems in determining whether, for example, the signal has changed phase by +180° or -180°.
Read “Phase modulation” on English Wikipedia
Read “位相変調” on Japanese Wikipedia
Read “Phase modulation” on DBpedia
Read “Phase modulation” on English Wikipedia
Read “位相変調” on Japanese Wikipedia
Read “Phase modulation” on DBpedia
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