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:
Jan. 19, 2010
Filed:
Feb. 27, 2006
Chi-hsi Su, Hsinchu, TW;
Chi-Hsi Su, Hsinchu, TW;
Sunplus Technology Co., Ltd., Hsinchu, TW;
Abstract
An apparatus and method for adaptively correcting I/Q imbalance, which is used in a receiver for correcting a received I/Q imbalanced signal to thus eliminate the I/Q imbalance. First, an interference amount caused by interference from an imbalanced in-phase signal to an imbalanced quadrature-phase signal is computed and accordingly subtracted from the quadrature-phase signal, so that a corrected quadrature-phase signal without phase imbalance is obtained. Next, a power of output in-phase signal, a power of output quadrature-phase signal, and a target are compared to thus determine an in-phase scaling factor and a quadrature-phase scaling factor. Finally, the imbalanced in-phase signal is multiplied by the in-phase scaling factor to thus obtain the output in-phase signal, and the corrected quadrature-phase signal is multiplied by the quadrature-phase scaling factor to thus obtain the output quadrature-phase signal.