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. 13, 2015
Filed:
Feb. 03, 2011
Tadao Nakagawa, Yokosuka, JP;
Etsushi Yamazaki, Yokosuka, JP;
Koichi Ishihara, Yokosuka, JP;
Takayuki Kobayashi, Yokosuka, JP;
Riichi Kudo, Yokosuka, JP;
Yasushi Takatori, Yokosuka, JP;
Munehiro Matsui, Yokosuka, JP;
Yutaka Miyamoto, Yokosuka, JP;
Akihide Sano, Yokosuka, JP;
Eiji Yoshida, Yokosuka, JP;
Masato Mizoguchi, Yokosuka, JP;
Tadao Nakagawa, Yokosuka, JP;
Etsushi Yamazaki, Yokosuka, JP;
Koichi Ishihara, Yokosuka, JP;
Takayuki Kobayashi, Yokosuka, JP;
Riichi Kudo, Yokosuka, JP;
Yasushi Takatori, Yokosuka, JP;
Munehiro Matsui, Yokosuka, JP;
Yutaka Miyamoto, Yokosuka, JP;
Akihide Sano, Yokosuka, JP;
Eiji Yoshida, Yokosuka, JP;
Masato Mizoguchi, Yokosuka, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
A polarization state of a transmission signal can be changed at a high speed based on a symbol-rate By switching a first switch, a second switch, and a third switch with time, one of an X-polarized wave_I-signal as a Y-polarized wave_I-signal, a signal caused by performing logical inversion for an X-polarized wave_I-signal, an X-polarized wave_Q-signal and a signal caused by logical inversion for an X-polarized wave_Q-signal is input to a second modulator. Further, by switching the first switch, the second switch and the third switch with time, the second modulator is input one of the X-polarized wave_I-signal as the Y-polarized wave_Q-signal, the X-polarized wave_I-signal, the signal caused by performing logical inversion for the X-polarized wave_I-signal, the X-polarized wave_Q-signal and the signal caused by performing logical inversion for the X-polarized wave_Q-signal. Thereby, a polarization state of a transmission signal can be changed at high speed based on a symbol-rate speed.