振幅偏移調變,又稱幅移鍵控[1][2]、振幅鍵移(英語:Amplitude-shift keying,ASK)是通過載波的振幅變化來表示數字信號的一種幅度調製方式。在一個ASK系統中,二進制符號1會通過一個固定振幅、固定頻率的載波信號來表示。這一載波信號會持續T秒。如果信號的值為1,就會傳輸載波信號,反之則不會傳輸載波信號。
參考資料
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