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Parallel shift register generators: theory and applications to parallel scrambling in multibit-interleaved multiplexing environments

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2 Author(s)
Seek Chang Kim ; AT&T Bell Labs., Middletown, NJ, USA ; Byeong Gi Lee

A theory is developed on parallel shift register generators (PSRG) and its parallel scrambling applications are discussed in the multibit-interleaved multiplexing environments. The PSRG is a shift register generator (SRG) which generates multiple sequences in such a way that when these multiple sequences are multibit-interleaved the resulting sequence becomes identical to some prespecified sequence. The properties of PSRGs are discussed and efficient realizations of PSRGs are examined with stress put on a special class of PSRGs for which the generating polynomials are irreducible. Finally demonstrations are given on the application of the PSRG theory to parallel scrambling of the SDH-based lightwave transmission signals STM-4 and STM-16.<>

Published in:

Communications, IEEE Transactions on  (Volume:43 ,  Issue: 2/3/4 )