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Digital communication

  1. advantages of digital signal
  • The effect of distortion, noise, and interference is much less in digital signals as they are less affected.
  • Digital circuits are more reliable.
  • Digital circuits are easy to design and cheaper than analog circuits.
  • The hardware implementation in digital circuits is more flexible than analog.
  • The occurrence of cross-talk is very rare in digital communication.
  • The signal is un-altered as the pulse needs a high disturbance to alter its properties, which is very difficult.
  • Signal processing functions such as encryption and compression are employed in digital circuits to maintain the secrecy of the information.
  • The probability of error occurrence is reduced by employing error detecting and error correcting codes.
  • Spread spectrum technique is used to avoid signal jamming.
  • Combining digital signals using Time Division Multiplexing (TDM) is easier than combining analog signals using Frequency Division Multiplexing (FDM).
  • The configuring process of digital signals is easier than analog signals.
  • Digital signals can be saved and retrieved more conveniently than analog signals.
  • Many of the digital circuits have almost common encoding techniques and hence similar devices can be used for a number of purposes.
  • The capacity of the channel is effectively utilized by digital signals.

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