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:
Aug. 26, 2008
Filed:
Mar. 14, 2005
Masashi Naito, Tokyo, JP;
Masashi Naito, Tokyo, JP;
Hitachi Kokusai Electric Inc., Tokyo, JP;
Abstract
In a signal generator, a peak value/peak position detection section detects value and position of an amplitude peak observed in modulation data coming from an orthogonal modulation section, and a peak carrier extraction section extracts L subcarriers capable of minimizing such an amplitude peak. A peak carrier generation section generates peak suppression data corresponding to thus extracted subcarriers, and a subtraction section subtracts the peak suppression data from the modulation data. A transmission signal generation section generates an analog transmission signal from the modulation data, and a peak suppression section generates an analog peak suppression signal from the peak suppression data. A signal synthesis section synthesizes the transmission signal and the peak suppression signal, and sends out the synthesis result to a wireless communications line via a transmission antenna. With such a structure, any amplitude peak found in a multicarrier transmission signal can be successfully suppressed.