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On Optimal Binary One-Error-Correcting Codes of Lengths 2^{m}-4 and 2^{m}-3

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3 Author(s)
Krotov, D.S. ; Mech. & Math. Dept., Novosibirsk State Univ., Novosibirsk, Russia ; Ostergard, P.R.J. ; Pottonen, O.

Best and Brouwer proved that triply-shortened and doubly-shortened binary Hamming codes (which have length 2m-4 and 2m-3, respectively) are optimal. Properties of such codes are here studied, determining among other things parameters of certain subcodes. A utilization of these properties makes a computer-aided classification of the optimal binary one-error-correcting codes of lengths 12 and 13 possible; there are 237 610 and 117 823 such codes, respectively (with 27 375 and 17 513 inequivalent extensions). This completes the classification of optimal binary one-error-correcting codes for all lengths up to 15. Some properties of the classified codes are further investigated. Finally, it is proved that for any m ≥ 4, there are optimal binary one-error-correcting codes of length 2m-4 and 2m-3 that cannot be lengthened to perfect codes of length 2m-1.

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Information Theory, IEEE Transactions on  (Volume:57 ,  Issue: 10 )