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What is meant by pulse code modulation (PCM) amplitude modulation (AM) and frequency modulation

What is meant by pulse code modulation (PCM) amplitude modulation (AM) and frequency modulation

Grade:11

2 Answers

Saurabh Koranglekar
askIITians Faculty 10341 Points
one year ago
Amplitute Modulation

Amplitude modulation or AM is the process of varying the instantaneous amplitude of carrier signal accordingly with instantaneous amplitude of message signal.Thus, if m(t) is the message signal and c(t)=Acoswct then AM signal F(t) is written as
F(t)= Acoswct+m(t) coswct
F(t)=[A+m(t)] coswct

Frequency modulation

FM or Frequency modulation is the process of varying the in instantaneous frequency of Carrier signal accordingly with instantaneous amplitude of message signal. Thus, if m(t) is the message signal and c(t)=Acoswct then FM signal will beF(t)= Acos(wct+kf∫m(α)dα)

Pulse code modulationis a method that is used to convert an analog signal into a digital signal so that a modified analog signal can be transmitted through the digital communication network
Vikas TU
14149 Points
one year ago
Dear student 
Pleaze refer the ik below 
Goo Luck 

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