Parallel CRC (Cyclic Redundancy Check) error correction method having single bit error correction function
An error correction method and parallel algorithm technology, applied in the field of communication, can solve the problems of slow transmission speed, low data transmission efficiency, slow operation, etc., to reduce packet error rate, improve transmission efficiency and reliability, and reduce storage space. Effect
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[0071] example 1
[0072] First establish a look-up table, set a certain bit in a packet of data to '1', and set all other bits to '0', respectively calculate the CRC values when different bits are '1' and put them Placed in the corresponding query table position for subsequent queries after solving. Set z here i When the i-th bit in the data packet is ‘1’, T[CRC G (z i )] is the CRC value calculated when the i-th bit is '1'. Here a simple example is used to illustrate how the lookup table is generated. Let the CRC check polynomial be G=x 3 +x+1, can be expressed as 1011, the transmitted data is 4 bits, here we need 3 CRC as the check bit of the data, then z 1 = 1000000, now we have CRC G (z 1 )=5, in the same way we can get CRC G (z 2 )=7, CRC G (z 3 )=6, CRC G (z 4 )=3, CRC G (z 5 )=4, CRC G (z 6 )=2 and CRC G (z 7 )=1. If the results of any two CRC operations are not the same, then we can consider the CRC G For z i It has single mapping, that is, the corresponding bit error...
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