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