Invention Grant
- Patent Title: Optical transmission distortion compensation device, optical transmission distortion compensation method, and communication device
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Application No.: US16094857Application Date: 2017-06-21
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Publication No.: US10374718B2Publication Date: 2019-08-06
- Inventor: Yasuharu Onuma , Etsushi Yamazaki , Hiroyuki Nouchi , Tomohiro Takamuku , Katsuichi Oyama , Kazuhito Takei , Masanori Nakamura , Mitsuteru Yoshida , Masahito Tomizawa
- Applicant: NTT ELECTRONICS CORPORATION , NIPPON TELEGRAPH AND TELEPHONE CORPORATION
- Applicant Address: JP Yokohama-shi, Kanagawa JP Tokyo
- Assignee: NTT ELECTRONICS CORPORATION,NIPPON TELEGRAPH AND TELEPHONE CORPORATION
- Current Assignee: NTT ELECTRONICS CORPORATION,NIPPON TELEGRAPH AND TELEPHONE CORPORATION
- Current Assignee Address: JP Yokohama-shi, Kanagawa JP Tokyo
- Agency: Myers Wolin, LLC
- Priority: JP2016-167086 20160829
- International Application: PCT/JP2017/022871 WO 20170621
- International Announcement: WO2018/042838 WO 20180308
- Main IPC: H04B10/60
- IPC: H04B10/60 ; H04B10/40 ; H04B10/58 ; H04B10/61 ; H04B10/516
Abstract:
An I component compensation unit calculates an I component in which a distortion has been compensated, by forming a first polynomial expressing the distortion of the I component based on an I component and a Q component of a quadrature modulation signal and multiplying each term of the first polynomial by a first coefficient. A Q component compensation unit calculates a Q component in which a distortion has been compensated, by forming a second polynomial expressing the distortion of the Q component based on the I component and the Q component of the quadrature modulation signal and multiplying each term of the second polynomial by a second coefficient. A coefficient calculation unit calculates the first and second coefficients by comparing outputs of the I component compensation unit and the Q component compensation unit and a known signal.
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