UNIT 2 PREPARATIONS SHORTS

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 DIGITAL COMMUNICATION PRINCIPLES:-


  1. Define communication ?classification of communication?
  2. Define analog and digital signals
  3. Advantages and disadvantages of digital communication over analog communication ?
  4. Information capacity of a channel ?
  5. Convertion of analog signal to digital signal?
  6. Define sampling ? explain sampling theorem?
  7. Define nyquist and aliasing effect ?
  8. Draw the waveform for PAM,PWM,PPM?
  9. Compare PAM , PWM ,PPM?
  10. Define sampling ,quantization,encoding ?
  11. Draw the block diagram for PCM coding and decoding ?
  12. Applications ,advantages,disadvantages of PCM ?

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