Block diagram of spread spectrum digital communication

Spread spectrum digital communication

Spread spectrum digital communication

The block diagram of spread spectrum digital communication is shown in above fig. the basic elements of a spread spectrum digital communication system with a binary information sequence at its input at the transmitting end and its output at the receiving end.

Functions of each block:

  • Channel encoder : The channel encoder adds some redundant bits to the input bit sequence in properly defined format.
  • Pseudorandom generator : It produced a pseudorandom or pseudonoise binary valued sequence.
  • Modulator : Pseudonoise (PN) binary valued sequence is impressed on the transmitted signal at modulator.
  • Channel : Medium through which signal travels towards receiver.
  • Demodulator : The impressed PN sequence removed from the received signal at the demodulator.
  • Channel decoder : The decoder at the receiver uses the coded bits to reconstruct error free accurate bit sequence and reduce the effects of channel noise and distortion.

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