Digital data scrambler and descrambler

Details Digital data scrambler and descrambler Digital data scrambler and descrambler

1975-02-26

1976-10-26

Birmiel, Howard A.

Telegraphy

Systems

Printing

3401461BE, 235180, H04L 900, H04K 100

Patent

active

039885380

ABSTRACT:
A digital data scrambler and descrambler for m parallel synchronized digital data streams, where m is an integer greater than one, is disclosed. The scrambler and descrambler each include m linear sequential filters, each of the m filters being associated with a different one of the m data streams. Each of the scrambler filters include a feedback path and tapping connections to the feedback path and each of the descrambler filters include a feedforward path and tapping connections to the feedforward path. The nature and location of the tapping connections of both the scrambler and descrambler filters are determined in accordance with a polynomial expression which is the same for a matched scrambler and descrambler.

REFERENCES:
patent: 3452328 (1969-06-01), Hsiao et al.
patent: 3515805 (1970-06-01), Fracassi et al.
patent: 3649915 (1972-03-01), Mildonian, Jr.
patent: 3784743 (1974-01-01), Schroeder
"Serial-to-Parallel Transformation of Linear-Feedback Shift-Register Circuits," Hsiao et al., IEEE Transactions on Electronic Computers, Dec. 1964, pp. 738-740.

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