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:
Sep. 05, 2017
Filed:
Jul. 15, 2015
Applicant:
Zte Corporation, Shenzhen, CN;
Inventors:
Assignee:
ZTE Corporation, Shenzhen, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 10/035 (2013.01); H04B 10/69 (2013.01); H04B 10/2575 (2013.01); H04B 10/61 (2013.01); H04L 25/03 (2006.01);
U.S. Cl.
CPC ...
H04B 10/6971 (2013.01); H04B 10/2575 (2013.01); H04B 10/61 (2013.01); H04B 10/616 (2013.01); H04L 25/03019 (2013.01);
Abstract
Modulated optical signals are received in a coherent optical receiver employing both post digital filter and inter-symbol-interference (ISI) equalizer such as a maximum likelihood sequence estimation (MLSE) or Bahl-Cocke-Jelinek-Raviv (BCJR) algorithms. Some disclosed techniques are directed to adaptively adjusting the impulse response in time domain (or equivalently the frequency response in frequency domain) of the post digital filter and the corresponding structure of ISI equalizer in different spectrum-narrowing operation scenarios.