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. 29, 2020
Filed:
Dec. 19, 2017
Nec Corporation, Minato-ku, Tokyo, JP;
Hidemi Noguchi, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
A reception deviceis configured to include a separation meansand a plurality of optical reception means. Each optical reception meansis configured to further include an optical/electrical conversion meansand a band restoration means. The separation meansseparates a multiplexed signal into which signals of respective channels to which spectral shaping that narrows bandwidth to less than or equal to a baud rate is applied are multiplexed at spacings less than or equal to the baud rate on the transmission side into optical signals for the respective channels. Each optical/electrical conversion meansconverts an optical signal to an electrical signal as a reception signal. Each band restoration meansapplies processing having inverse characteristics to those of the band narrowing filter processing to the reception signal and restores the band of the reception signal.