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:
Apr. 13, 2010
Filed:
Aug. 10, 2006
Tetsuhiko Miyatani, Tokyo, JP;
Masashi Naito, Tokyo, JP;
Naoki Hongo, Tokyo, JP;
Takashi Okazaki, Tokyo, JP;
Tetsuhiko Miyatani, Tokyo, JP;
Masashi Naito, Tokyo, JP;
Naoki Hongo, Tokyo, JP;
Takashi Okazaki, Tokyo, JP;
Hitachi Kokusai Electric, Inc., Tokyo, JP;
Abstract
The invention provides a spectrum analyzing method, a distortion detector and a distortion compensation amplifying device for performing time/frequency conversion processing at high speed, and reducing a convergent time of a compensation coefficient. The distortion detector for detecting distortion in a frequency area with respect to an input signal includes a time window processing section for multiplying the input signal by a time window; an averaging processing section for averaging an output of the time window processing section; an FFT processing section for converting an output of the averaging processing section from a time area to a frequency area; and a distortion extracting section for extracting a distortion component from an output of the FFT processing section.