IQ-imbalance

专利名称：IQ-imbalance

发明人：Tommi Auranen,Juha Kajava申请号：US10482254申请日：20020625公开号：US07336730B2公开日：20080226

专利附图：

摘要：The invention relates to a method for correcting an IQ-imbalance (In-phase andQuadrature) of an IQ-based direct conversion receiver (). In the method a group of radiofrequency pilot signals are received in the direct conversion receiver (). They are conveyedto an in-phase branch and a quadrature-phase branch of the receiver () and mixed, in the

analogue domain, to form a baseband in-phase (I) and quadrature-phase (Q) signalcomponents. The signal componets are conveyed to a digital demodulator () whichdetects the IQ-phase imbalance of the direct conversion receiver () by analysing at leastone of the baseband in-phase (I) and the quadrature-phase (Q) signal components. In themethod, the detected IQ-imbalance is corrected, in the analogue domain of the directconversion receiver (), to achieve a 90 degrees phase difference between a futurebaseband in-phase (I) signal component and a future baseband quadrature-phase (Q)signal component.

申请人：Tommi Auranen,Juha Kajava

地址：Turku FI,Naantali FI

国籍：FI,FI

代理机构：Alston & Bird LLP

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