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. 15, 2017
Filed:
Jul. 16, 2015
Nec Corporation, Tokyo, JP;
Masaki Oe, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An optical reception device according to an exemplary aspect of the invention includes an optical front-end means for demodulating an inputted optical signal, converting the demodulated signal into an electrical signal and outputting the electrical signal, a pre-emphasis means for adding a high frequency component to the electrical signal, a digital signal processing means for receiving input of the electrical signal with the high frequency component added thereto via a transmission wire, and for performing a digital coherent reception process on the inputted electrical signal, an error detection means for detecting a signal error in the digital coherent reception process and a feedback control means for varying the level of a high frequency component added at the pre-emphasis means and, in accordance with signal errors detected at that time, controlling the pre-emphasis means.