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:
Mar. 12, 2013
Filed:
Mar. 31, 2008
Takashi Mizuochi, Tokyo, JP;
Yoshiaki Konishi, Tokyo, JP;
Tatsuya Kobayashi, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
In a digital signal processing optical transmission apparatus such as a predistortion or OFDM type one, optical transmission at a stable S/N ratio is intended to be able to be made by controlling an output of an optical transmission signal with fixed average power, even if a peak to average power ratio of the optical transmission signal changes. The apparatus is provided with an average power calculation unit () that calculates the average power of a digital signal outputted from a digital signal processing circuit (), and an optical power variable unit () that serves to make constant the average power of an optical transmission signal outputted from an optical vector modulator ().