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:
Jan. 01, 2019
Filed:
Mar. 17, 2015
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Seiji Okamoto, Yokosuka, JP;
Koichi Ishihara, Yokosuka, JP;
Etsushi Yamazaki, Yokosuka, JP;
Mitsuteru Yoshida, Yokosuka, JP;
Tomoyoshi Kataoka, Yokosuka, JP;
Kazushige Yonenaga, Yokosuka, JP;
Yoshiaki Kisaka, Yokosuka, JP;
Masanori Nakamura, Yokosuka, JP;
Masahito Tomizawa, Yokosuka, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Abstract
An optical signal transmission apparatus includes a modulation unit which modulates a transmission signal, a training signal sequence generation unit which generates a plurality of signal sequences having power concentrated in a plurality of different frequency bands, at least one of an amplitude and a phase of the plurality of signal sequences being modulated, as a training signal sequence, a signal multiplexing unit which appends the training signal sequence to the transmission signal, and an electro-optical conversion unit which converts a signal sequence obtained by appending the training signal sequence to the transmission signal into an optical signal and transmits the optical signal.