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1. (WO2017150661) DIGITAL OPTICAL RECEIVER AND OPTICAL COMMUNICATION SYSTEM USING SAME

Pub. No.:    WO/2017/150661    International Application No.:    PCT/JP2017/008265
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Fri Mar 03 00:59:59 CET 2017
IPC: H04B 10/61
H04B 3/06
H04B 10/2507
H04L 27/01
Applicants: NEC CORPORATION
日本電気株式会社
Inventors: NOGUCHI Hidemi
野口 栄実
Title: DIGITAL OPTICAL RECEIVER AND OPTICAL COMMUNICATION SYSTEM USING SAME
Abstract:
A digital optical receiver capable of adaptively correcting the linearity of an analog front end unit is provided. The digital optical receiver comprises: a photoelectric conversion unit that converts an optical signal into an analog electric signal and outputs the analog electric signal; an analog front end unit that converts the analog electric signal obtained from the photoelectric conversion unit into a digital electric signal and outputs the digital electric signal; a linearity correction unit that corrects the linearity of the digital electric signal obtained from the analog front end unit; a demodulation processing unit that demodulates a signal by using, as input, the digital electric signal obtained from the linearity correction unit; and a control unit that controls the linearity correction unit so that the linearity correction unit provides an offset signal to the analog electric signal outputted by the photoelectric conversion unit, obtains monitor information for the result of the provision of the offset signal, and corrects the linearity of the digital electric signal obtained from the analog front end unit on the basis of the monitor information.