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发明授权
CN1848831B 处理来自调谐器的同相和正交信号的方法和接收器 失效 - 权利终止

处理来自调谐器的同相和正交信号的方法和接收器
摘要：
本发明公开了一种校正同相正交(IQ)不平衡的设备和方法。所述处理来自调谐器的I和Q信号的接收器包括：非决策控制的(NDD)不平衡消除器，用以接收I和Q信号；以及决策控制的(DD)不平衡消除器，与所述非决策控制的不平衡消除器耦合，其中所述决策控制的不平衡消除器在所述非决策控制的不平衡消除器收敛之后收敛，以便校正接收器内的IQ不平衡。所述处理来自调谐器的I和Q信号的方法，包括：(a)收敛非决策控制的不平衡消除器以校正IQ不平衡中的多数部分；(b)随后收敛决策控制的不平衡消除器以校正步骤(a)中未校正的所述IQ不平衡中的余下部分。所述设备和方法校正与频率有关的和与频率无关的IQ不平衡。
摘要（英）：

An apparatus and method for correcting IQ imbalance are presented. An exemplary receiver for processing I and Q signals from a tuner includes: a non-decision directed (NDD) imbalance canceller coupled to receive the I and Q signals, and a decision directed (DD) imbalance canceller coupled to the non-decision directed imbalance canceller. The DD imbalance canceller converges after the NDD imbalance canceller converges, so as to correct IQ imbalances in the receiver. An exemplary method for processing I and Q signals from a tuner includes: (a) converging a NDD imbalance canceller to correct a majority of IQ imbalances, and (b) subsequently converging a DD imbalance canceller to correct a remainder of IQ imbalances not corrected in step (a). The apparatus and method correct frequency-dependent and frequency-independent IQ imbalances.

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