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:
Jul. 23, 2019
Filed:
Dec. 28, 2016
Applicant:
Infinera Corporation, Sunnyvale, CA (US);
Inventors:
Assignee:
Infinera Corporation, Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 25/03 (2006.01); H04B 10/035 (2013.01); H04B 10/27 (2013.01);
U.S. Cl.
CPC ...
H04L 25/03076 (2013.01); H04B 10/035 (2013.01); H04B 10/27 (2013.01); H04L 2025/03636 (2013.01); H04L 2025/03675 (2013.01); H04L 2025/03687 (2013.01); H04L 2025/03802 (2013.01);
Abstract
Apparatus and methods may provide improved equalizer performance, e.g., for optical-fiber-based communication systems. A least-mean-square (LMS) equalizer may include a decision feedback path containing feedback carrier recovery (FBCR), which may have low latency, and which may thus enable high-speed tap updating in the equalizer. Feed-forward carrier recovery (FFCR) may be applied, in parallel with the FBCR, to provide equalizer output by compensating, e.g., for phase noise, with improved carrier recovery/compensation, versus using FBCR to generate the output.