Error Detection Coding

Error detection coding The theoretical limitations of coding are placed by the results of information theory. These results are frustrating in that they offer little clue as to how the coding should be performed. Error detection coding is designed to permit the detection of errors. Once detected, the receiver may ask for a re-transmission of the erroneous bits, or it may simply inform the recipient that the transmission was corrupted. In a binary channel, error …

…Since the remainder has been added, the result should be zero. A non-zero result indicates that an error has occurred. A polynomial code can detect any error burst of length less than or equal to the length of the generator polynomial. The technique requires the addition of hardware to perform the division. However, with modern integrated circuitry, this hardware is now available inexpensively. CRC error checking is now quite common, and its use will increase.