Error Detection

• Example: n=2k
  • Repeat the frame
  • k redundant bits

• Example: Simple Parity Check

• Even Parity
  • number of "1" per block is even

• Odd Parity
  • number of "1" per block is odd

• Redundancy ratio = k+1/k

• Performance criteria for error detection codes is the probability of an undetected error,

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