Journal of Applied Sciences ›› 2015, Vol. 33 ›› Issue (2): 178-186.doi: 10.3969/j.issn.0255-8297.2015.02.007

• Communication Engineering • Previous Articles     Next Articles

Blind Recognition of Self-Synchronized Scrambler Based on Linear Block Code

ZHANG Min1,2, LÜ Quan-tong1,2, ZHU Yu-xuan3   

  1. 1. Network Department, Institute of Electronic Engineering, Hefei 230037, China
    2. Key Laboratory of Electronic Control technology, Hefei 230037, China
    3. Department of Electronic Engineer, Tsinghua University, Beijing 100084, China
  • Received:2014-09-19 Revised:2014-12-15 Online:2015-03-30 Published:2014-12-15

Abstract: A blind recognition method of self-synchronous scrambler based on the linear
block code with unbiased information source is proposed. Different run characteristics of
the linear block code and random sequence are analyzed, leading to the conclusion that the
run feature of correctly extracted scrambler sequence differs from that of the wrong one.
A polynomial of the scrambler is determined with maximum value search in all possible
Euclidean distances between the run ratios of extracted and random sequences. Experiments
and simulation results show correctness of the theoretical analysis. Blind recognition
of self-synchronous scrambler after the linear block code with unbiased information source
can be realized, useful in engineering application.

Key words: self-synchronized scrambler, blind recognition, linear block code, run characteristic, Euclidean distance

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