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. 13, 2014
Filed:
May. 10, 2012
Shinichi Ito, Atsugi, JP;
Tatsuro Hanaya, Atsugi, JP;
Shinichi Ito, Atsugi, JP;
Tatsuro Hanaya, Atsugi, JP;
Anritsu Corporation, Atsugi-Shi, JP;
Abstract
To provide a quadrature modulator, a signal generating device, and a quadrature modulation method capable of correcting a gain balance error, a zero offset error, and an orthogonality error that occur during quadrature modulation. The quadrature modulatorincludes a quadrature modulation unit, a quadrature modulation error calculating unitthat calculates quadrature modulation errors on the basis of the power of a quadrature-modulated signal output from the quadrature modulation unit, and an error correcting unitthat corrects a baseband signal such that the quadrature modulation errors are removed. The quadrature modulation error calculating unitincludes a power measuring unitthat measures the power of the quadrature-modulated signal, a gain balance error calculating unit, a zero offset error calculating unit, and an orthogonality error calculating unit