Group 5-3 - Error detection is the ability to detect the...

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Unformatted text preview: Error detection is the ability to detect the presence of errors caused by noise or other impairments during transmission from the transmitter to the receiver. Error correction is the additional ability to reconstruct the original, error-free data. Changes the shape of a signal Modifies the bits in a sequence Animation of interference of waves coming from two point sources. Single bit error : 1 bit changes Burst error : 2 or more bits in the data unit changed Sending extra bits with the data Added by the sender Removed by the receiver Allows receiver to detect or correct corrupted bits. Using XOR n = k + r Dataword = k bits Redundant bits = r bits Codeword = n bits The sender uses a Generator which adds redundant bits based on the coding mechanism to form the codeword. The receiver uses a Checker to examine the redundant bits and determine if an error has occurred. Parity Check Hamming Code CRC Checksum...
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Group 5-3 - Error detection is the ability to detect the...

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