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:
Nov. 10, 2009
Filed:
Sep. 30, 2004
Applicants:
Raul Benet Ballester, Premla de Mar, ES;
Adriaan J. DE Lind Van Wijngaarden, New Providence, NJ (US);
Ralf Dohmen, VS-Villingen, DE;
Inventors:
Raul Benet Ballester, Premla de Mar, ES;
Adriaan J. De Lind Van Wijngaarden, New Providence, NJ (US);
Ralf Dohmen, VS-Villingen, DE;
Assignee:
Alcatel-Lucent USA Inc., Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and apparatus for frame synchronization in digital communication systems using multiple modulation formats perform a search for a differential frame alignment sequence (FAS) to frame-align the received digital stream and determine the polarity of the stream. Embodiments of the invention are compatible with Differential Phase Shift Keying (DPSK), Duobinary Signaling (DBS), and ON/OFF Keying (OOK) modulation formats.