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arXiv · 1611.10088

On Binary de Bruijn Sequences from LFSRs with Arbitrary Characteristic Polynomials

Zuling Chang·Martianus Frederic Ezerman·San Ling·Huaxiong Wang
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Abstract

We propose a construction of de Bruijn sequences by the cycle joining method from linear feedback shift registers (LFSRs) with arbitrary characteristic polynomial $f(x)$. We study in detail the cycle structure of the set $Ω(f(x))$ that contains all sequences produced by a specific LFSR on distinct inputs and provide a fast way to find a state of each cycle. This leads to an efficient algorithm to find all conjugate pairs between any two cycles, yielding the adjacency graph. The approach is practical to generate a large class of de Bruijn sequences up to order $n \approx 20$. Many previously proposed constructions of de Bruijn sequences are shown to be special cases of our construction.

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Zuling Chang, Martianus Frederic Ezerman, San Ling, Huaxiong Wang. 2018-06-08. On Binary de Bruijn Sequences from LFSRs with Arbitrary Characteristic Polynomials. https://doi.org/10.1007/s10623-018-0509-y

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