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. 05, 2022
Filed:
Nov. 22, 2019
Nec Corporation, Tokyo, JP;
Nec Space Technologies, Ltd., Fuchu, JP;
Hideaki Kotake, Tokyo, JP;
Yoichi Hashimoto, Tokyo, JP;
Seiichirou Miyaki, Tokyo, JP;
Kazushi Kondo, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
NEC Space Technologies, Ltd., Tokyo, JP;
Abstract
To provide a technology in which a differential phase modulation manner can be applied to a space environment for satellite mounting, the optical receiverincludes a digital signal processing unit has: a level fluctuation frequency suppression unitwhich suppresses a level fluctuation frequency component of the peak signal; an optical delay interference control unitwhich generates an optical delay interference control signal, which is overdrive-amplified, on the basis of the peak signal of which the level fluctuation frequency component is suppressed and applies the generated optical delay interference control signal to the optical delay interferometer; and a data recovery unitwhich recovers output data on the basis of the main signal from the wideband balanced optical detector