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:
Feb. 28, 2012
Filed:
Sep. 30, 2004
Raul Benet Ballester, Premia de Mar, ES;
Adriaan J. DE Lind Van Wijngaarden, New Providence, NJ (US);
Ralf Dohmen, VS-Villingen, DE;
Bernd Dotterweich, Pommersfeldon, DE;
Miguel Robledo, Nuremberg, DE;
Swen Wunderlich, Dresden, DE;
Raul Benet Ballester, Premia de Mar, ES;
Adriaan J. De Lind Van Wijngaarden, New Providence, NJ (US);
Ralf Dohmen, VS-Villingen, DE;
Bernd Dotterweich, Pommersfeldon, DE;
Miguel Robledo, Nuremberg, DE;
Swen Wunderlich, Dresden, DE;
Alcatel Lucent, Paris, FR;
Abstract
A method and apparatus for frame synchronization in digital communication systems using multiple modulation formats, including the Differential Phase Shift Keying (DPSK), Duobinary Signaling (DBS), and ON/OFF Keying (OOK) modulation formats, perform a search for both a frame alignment sequence (FAS) and the inverted FAS and determine the polarity of the received digital stream.