Blind estimation of scrambler offset using encoder redundancy

A self-recovering receiver for encoded and scrambled binary data streams is proposed in this paper. The generating polynomial of the scrambling sequence is known, as well as the encoder structure and coefficients, but the scrambler time offset is unknown. Taking profit of redundancy introduced by th...

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Bibliographic Details
Published inConference Record of the Thirty-Sixth Asilomar Conference on Signals, Systems and Computers, 2002 Vol. 1; pp. 626 - 630 vol.1
Main Authors Gautier, R., Burel, G., Letessier, J., Berder, O.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2002
Subjects
Binary sequences
Block codes
Decoding
Digital filters
Digital modulation
Feedback
Protection
Redundancy
Shift registers
Transmitters
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Summary:A self-recovering receiver for encoded and scrambled binary data streams is proposed in this paper. The generating polynomial of the scrambling sequence is known, as well as the encoder structure and coefficients, but the scrambler time offset is unknown. Taking profit of redundancy introduced by the encoder, we proposed a method which is able to estimate the scrambling sequence offset from the observed scrambled stream. The method is based on the projection of the observed data on the encoder orthogonal subspace. Once the offset has been estimated, classical data descrambling and decoding can be used to recover the information stream.
ISBN:0780375769
9780780375765
ISSN:1058-6393
2576-2303
DOI:10.1109/ACSSC.2002.1197256