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Types Of Digital Modulation

  

 

Three types of digital modulation are

  1. Amplitude-Shift Keying (ASK)
    In ASK, modulated signal can be expressed as
    687.png
    As modulated signal is still an ON-OFF signal, thus ASK is also called on-off keying (OOK). 
  2. Frequency-Shift Keying (FSK)
    In FSK, modulated signal can be expressed as
    692.png 
  3. Phase-Shift Keying (PSK)
    In PSK, modulated signal can be expressed as
    697.png 

 



Probabilities Of Various Systems

 

ASK system: 703.png


BPSK
 system: 708.png


BFSK
 system 713.png

 





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