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:
Aug. 02, 2022
Filed:
Feb. 01, 2021
Applicant:
Fujitsu Optical Components Limited, Kawasaki, JP;
Inventor:
Toshio Ishii, Yokohama, JP;
Assignee:
FUJITSU OPTICAL COMPONENTS LIMITED, Kawaskai, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M 3/00 (2006.01); H03M 1/74 (2006.01); H03H 17/06 (2006.01);
U.S. Cl.
CPC ...
H03M 3/504 (2013.01); H03H 17/0614 (2013.01); H03M 1/74 (2013.01);
Abstract
An optical communication apparatus includes a level detector, an FIR filter, and a adjustor. The level detector detects level information that discriminates a change in a multi-value level based on an input signal used in a multi-value amplitude modulation system. The FIR filter compensates a signal band of the input signal in accordance with tap coefficients of a plurality of multipliers. The adjustor corrects the tap coefficient of each of the multipliers included in the FIR filter based on the level information detected in the level detector.