Abstract
It is an old conjecture that there are no unknown Barker sequences. Here, a sufficient condition for the non-existence of Barker sequences of even length 4m 2 is given, which allows us to show that there are no unknown sequences withm less than 105, exceptm=63, which remains still undecided.
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References
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R. H. Barker, Group synchronizing of binary digital systems, in:Communication Theory, (W. Jackson, ed.), Academic Press, New York, (1953), 273–287.
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L. D. Baumert,Cyclic Difference Sets, Springer Verlag, New York, (1971).
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T. W. Hungerford,Algebra, Springer-Verlag, New York, (1980).
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R. Turyn andJ. Storer, On binary sequences,Proc. Am. Math. Soc.,12 (1961), 394–399.
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Elia, M. On the non-existence of barker sequences. Combinatorica 6, 275–278 (1986). https://doi.org/10.1007/BF02579388
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AMS subject classification (1980)
- 05 B 99