Apparatus and method for calibrating in-phase and

专利名称：Apparatus and method for calibrating in-phase and quadrature-phase mismatch

发明人：Chao-Cheng Lee,Ying-Yao Lin,Ying-Hsi Lin申请号：US10908109申请日：20050428公开号：US07636405B2公开日：20091222

专利附图：

摘要：A method and device for calibrating in-phase and quadrature-phase (IQ)mismatch. The device is used in a direct down-conversion circuit of a communicationsystem. The device has a first mixer for mixing an RF signal with a first carrier signal, so as

to generate an in-phase analog signal; a second mixer for mixing the RF signal with asecond carrier signal, so as to generate a quadrature-phase analog signal; an operationunit for executing a Least Mean Square (LMS) algorithm and thereby generating acompensation signal according to the in-phase analog signal and the quadrature-phaseanalog signal; and a calibration unit for compensating the in-phase analog signal and thequadrature-phase analog signal according to the compensation signal, so as to calibratethe IQ mismatch between the in-phase analog signal and the quadrature-phase analogsignal.

申请人：Chao-Cheng Lee,Ying-Yao Lin,Ying-Hsi Lin

地址：Hsin-Chu TW,Hsin-Chu Hsien TW,Hsin-Chu TW

国籍：TW,TW,TW

代理人：Winston Hsu

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