Amplitude shift keying (ask)

Amplitude shift keying (ask)

1. Amplitude Shift Keying (ASK)
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2. Contents
•Introduction
•Modulation
•Advantages
•Disadvantages
•Applications

3. Introduction
•ASK means Amplitude Shift Keying
•amplitude of a carrier signal is varied with respect to
amplitude levels in the digital signal.

4. Modulation
•Digital input eg:(101010) and
•Carrier signal is multiplied
•It passed to BPF

5. Modulation
•a digital signal is at “1” it could not affect the signal
•when a digital signal is at “0” the signal goes to
zero.

6. Wave form

7. Demodulation
•ASK signal is allowed to LPF
•Digital signal is reconstructed

8. Advantages
•High efficiency
•Low noise interference

9. Disadvantages
•High bandwidth
•High power consumption
•Not suitable for wireless communication

10. Application
•It is used in Satellite link