The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 27, 1994
Filed:
Jan. 27, 1993
Heinz Wettengel, Ditzingen, DE;
Hartmut Borschel, Stuttgart, DE;
Alcatel N.V., Amsterdam, NL;
Abstract
Parallel working additive scramblers produce a predetermined pseudorandom sequence of length L in a word generator, which consists of an N-stage shift register. To obtain more than N parallel located pseudorandom sequences, the word generator is connected to a network in which, in addition to the pseudorandom sequences created by modulo-2 addition, other pseudorandom sequences are created with a different phase relation. Performing the linkage operations limits the maximum bit rate sequence that can be transmitted. The entire pseudorandom sequence is stored in a memory (S). The desired pseudorandom sequence is produced in a circular storage (RS) by means of shifting operations. The circular storage (RS) is in the form of a feedback shift register (SR) and is used as the memory (S), in which each of the outputs is connected to an input of an EXOR-gate, in which a pseudorandom sequence is modulo-2 added with a partial stream of a parallelized serial data stream. The partial streams are subsequently converted to parallel-serial form in a multiplexer. Data streams with a higher bit rate sequence are possible.