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:
Nov. 20, 2007
Filed:
Aug. 21, 2003
Kuo-ming Wu, Hsinchu, TW;
Mao-ching Chiu, Hsinchu, TW;
Jui-hsi Cheng, Hsinchu, TW;
Mediatek Inc., Hsin-Chu, TW;
Abstract
A method for I/Q mismatch calibration of a transmitter. First, a discrete-time signal is generated. Next, a corrected signal based on the discrete-time signal and a set of correction parameters Aand Bis obtained. Next, the corrected signal is converted to an analog corrected signal. Next, I/Q modulation is applied to the analog corrected signal and outputs a modulated signal. Next, a first, second, and third desired component measures and a first, second, and third image component measures with the first, second and third sets of the correction parameters Aand Bare respectively obtained from the modulated signal. Next, a fourth and fifth set of correction parameters Aand Bare obtained based on the first, the second, and the third desired component measures as well as the first, the second, and the third image component measures. Next, a fourth desired component measure and a fourth image component measure with the fourth set of correction parameters Aand Band a fifth desired component measure and a fifth image component measure with the fifth set of correction parameters Aand Bare obtained from the modulated signal. Finally, a final set of the correction parameters Aand Bare selected from the fourth and fifth sets of correction parameters.