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Optimization of cyclic redundancy-check codes with 24 and 32 parity bits

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3 Author(s)

The method developed by T. Fujiwara et al. (1985) for efficiently computing the minimum distance of shortened Hamming codes using the weight distribution of their dual codes is extended to treat arbitrary shortened cyclic codes. Using this method implemented on a high-speed special-purpose processor, several classes of cyclic redundancy-check (CRC) codes with 24 and 32 parity bits are investigated. The CRC codes of each class are known to have the same minimum distance dmin.L in a certain range L of block lengths n, and within each class that CRC code has been determined the minimum distance of which exceeds dmin.L up to the largest block length. The dmin profiles of the resulting codes are presented and compared with the dmin profiles of recent suggestions of P. Merkey and E. C. Posner (1984), as well as with the dmin profile of the widely used 32 parity-bit standard code recommended in IEEE-802

Published in:

Communications, IEEE Transactions on  (Volume:41 ,  Issue: 6 )

Date of Publication:

Jun 1993

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