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:
May. 03, 2011
Filed:
May. 24, 2005
Genichiro Ohta, Kanagawa, JP;
Daichi Imamura, Kanagawa, JP;
Keiji Takakusaki, Kanagawa, JP;
Mitsuru Uesugi, Kanagawa, JP;
Genichiro Ohta, Kanagawa, JP;
Daichi Imamura, Kanagawa, JP;
Keiji Takakusaki, Kanagawa, JP;
Mitsuru Uesugi, Kanagawa, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A modulating device capable of generating an OFDM signal and having a drastically improved frequency use efficiency. The modulating device has modulators (()) for modulating a signal to be modulated and having a Nyquist roll-off frequency characteristic with a carrier frequency having a difference two times the Nyquist frequency and combiners (()) for generating modulation output having a speed two times that of the signal to demodulated and the same Nyquist roll-off slope as the signal to be modulated by combining the outputs of the modulators (()). Thus a double speed wave can be superposed on the same frequency without varying the roll-off slope of the Nyquist characteristic, and therefore an OFDM signal () having a drastically improved frequency use efficiency is provided.