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Erschienen in: Designs, Codes and Cryptography 3/2017

30.12.2016

Mapping prefer-opposite to prefer-one de Bruijn sequences

verfasst von: Amir Rubin, Gera Weiss

Erschienen in: Designs, Codes and Cryptography | Ausgabe 3/2017

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Abstract

We present a mapping of the binary prefer-opposite de Bruijn sequence of order n onto the binary prefer-one de Bruijn sequence of order \(n-1\). The mapping is based on the differentiation operator \(D(\langle {b_1,\ldots ,b_l}\rangle ) = \langle b_2-b_1, b_3-b_2,\ldots , b_{l}-b_{l-1} \rangle \) where bit subtraction is modulo two. We show that if we take the prefer-opposite sequence \(\langle {b_1,b_2,\ldots ,b_{2^n}}\rangle \), apply D to get the sequence \(\langle {\hat{b}_1, \ldots , \hat{b}_{2^n-1}}\rangle \) and drop all the bits \(\hat{b}_i\) such that \(\langle {\hat{b}_i,\ldots ,\hat{b}_{i+n-1}}\rangle \) is a substring of \(\langle {\hat{b}_1,\ldots ,\hat{b}_{i+n-2}}\rangle \), we get the prefer-one de Bruijn sequence of order \(n-1\).
Literatur
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Zurück zum Zitat de Bruijn N.G.: A combinatorial problem. Proc. Koninklijke Ned. Akad. Wet. Ser. A 49(7), 758 (1946).MATH de Bruijn N.G.: A combinatorial problem. Proc. Koninklijke Ned. Akad. Wet. Ser. A 49(7), 758 (1946).MATH
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Zurück zum Zitat Lempel A.: On a homomorphism of the de Bruijn graph and its applications to the design of feedback shift registers. IEEE Trans. Comput. 100(12), 1204–1209 (1970).MathSciNetCrossRefMATH Lempel A.: On a homomorphism of the de Bruijn graph and its applications to the design of feedback shift registers. IEEE Trans. Comput. 100(12), 1204–1209 (1970).MathSciNetCrossRefMATH
Metadaten
Titel
Mapping prefer-opposite to prefer-one de Bruijn sequences
verfasst von
Amir Rubin
Gera Weiss
Publikationsdatum
30.12.2016
Verlag
Springer US
Erschienen in
Designs, Codes and Cryptography / Ausgabe 3/2017
Print ISSN: 0925-1022
Elektronische ISSN: 1573-7586
DOI
https://doi.org/10.1007/s10623-016-0322-4

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