Journal on Communications

   

Construction of De Bruijn Sequences from Whole LFSRs with 4 Cycles

ZHOU Cong wei, HU Bin, GUAN Jie   

  1. Department of Cryptogram Engineering, Strategic Support Force Information Engineering University, Zhengzhou 450001, China

Abstract: The method to construct de Bruijn sequences by join ing all the cycles into one cycle in the cycle structure of linear feedback shift register (LFSR) is called cyclecycle-joining method, which is currently an important and mainstream mainstream. In order to improve the construction efficiency and widen the application depth of cyclecycle-joining method, from the view of the number of c ycle s in the c ycle structurestructure, a method for constructing de Bruijn sequence based on whowhole LFSRLFSRs with 4 cycleycles was proposed for the first time time. Based on the characteristic o f cascade connection of LFSRs, the cycle structure of a class of cascaded feedback shift registers was determineddetermined. AccordinglyAccordingly, the exact number of whole n-order LFSRs with 4 cycles is given, and the total number of n-order de Bruijn sequence s constructed from whole n-order LFSRs with 4 cy-cles as well well.

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