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    • 46. 发明授权
    • Apparatus for measuring in-phase and quadrature (IQ) imbalance
    • 用于测量同相和正交(IQ)不平衡的装置
    • US08018990B2
    • 2011-09-13
    • US12027742
    • 2008-02-07
    • Kyeongho LeeJoonbae ParkJeong Woo LeeSeung-Wook LeeEal Wan Lee
    • Kyeongho LeeJoonbae ParkJeong Woo LeeSeung-Wook LeeEal Wan Lee
    • H04B3/46
    • H04L27/364H04L27/3863
    • The present general inventive concept relates to apparatuses and/or methods for measuring an in-phase and quadrature (IQ) imbalance. In one embodiment, a detector can measure an error caused by an IQ imbalance using a first IQ signal including a desired signal and a corresponding image signal by the IQ imbalance. The detector can include a derotator to derotate the first IQ signal by a first angular frequency to obtain a second IQ signal and derotate the first IQ signal by a second angular frequency to obtain a third IQ signal, a DC estimator to obtain a fourth IQ signal corresponding to a DC component of the second IQ signal and a fifth IQ signal corresponding to a DC component of the third IQ signal and a controller can determine a gain error or a phase error from the fourth IQ signal and the fifth IQ signal.
    • 本总体发明构思涉及用于测量同相和正交(IQ)不平衡的装置和/或方法。 在一个实施例中,检测器可以通过IQ不平衡来使用包括期望信号和对应图像信号的第一IQ信号来测量由IQ不平衡引起的误差。 检测器可以包括解旋器,以将第一IQ信号扭转第一角度频率以获得第二IQ信号并且将第一IQ信号解旋第二角频率以获得第三IQ信号,DC估计器以获得第四IQ信号 对应于第二IQ信号的DC分量和对应于第三IQ信号的DC分量的第五IQ信号,并且控制器可以从第四IQ信号和第五IQ信号确定增益误差或相位误差。