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:
Apr. 21, 2020
Filed:
Oct. 18, 2018
Applicant:
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Inventors:
Yangyang Fan, Beijing, CN;
Zhenning Tao, Beijing, CN;
Assignee:
FUJITSU LIMITED, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 27/36 (2006.01); H03D 3/00 (2006.01); H04L 27/38 (2006.01); H04L 27/00 (2006.01);
U.S. Cl.
CPC ...
H04L 27/364 (2013.01); H03D 3/009 (2013.01); H04L 27/0014 (2013.01); H04L 27/3863 (2013.01);
Abstract
An estimation apparatus for IQ imbalance of an optical transmitter, a compensation apparatus for IQ imbalance of an optical transmitter and electronic equipment; wherein, estimation and compensation of IQ imbalance of an optical transmitter are performed by directly using an estimation model based on a transform matrix of received signals and transmitted signals, therefore, a phase offset shift may be estimated accurately, and precision of estimation of drifts of various angles is ensured, furthermore, accurate recovery of the constellation diagram of received signals is achieved.