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    • 2. 发明申请
    • METHOD AND APPARATUS FOR REMOVING DC OFFSET IN A DIRECT CONVERSION RECEIVER
    • 在直接转换接收器中移除直流偏置的方法和装置
    • WO2010065281A3
    • 2010-08-26
    • PCT/US2009064679
    • 2009-11-17
    • MOTOROLA INCSTOGNER DARRELL JRAO YADUNANDANA NRUELKE CHARLES RLAMPERT CHET A
    • STOGNER DARRELL JRAO YADUNANDANA NRUELKE CHARLES RLAMPERT CHET A
    • H04B1/30H04B17/40H03D1/04
    • H04B1/30H04L25/061
    • A method and apparatus for correcting direct current (DC) offset errors of a received signal in a direct conversion receiver (DCR) are provided. DC offset correction algorithms are incorporated into the DCR, each algorithm being optimized for a particular receive signal operating environment. The DC offset correction algorithms remove DC offset errors in baseband In-phase and Quadrature-phase signals received within the direct conversion receiver baseband signal path. Individual DC offset correction algorithms are selected for use as determined by a signal quality estimator component. A DC offset correction component of the direct conversion receiver determines an appropriate DC offset correction algorithm suited for a particular operating environment. A criterion for a signal quality estimate is set to control transitioning between DCOC algorithms. A dual threshold strategy may be adopted to transition between one DC offset correction algorithm and another DC offset correction algorithm to provide hysteresis.
    • 提供了用于校正直接转换接收机(DCR)中的接收信号的直流(DC)偏移误差的方法和装置。 DC偏移校正算法被并入到DCR中,每个算法针对特定的接收信号操作环境进行优化。 DC偏移校正算法消除了在直接转换接收机基带信号路径内接收到的基带同相和正交相信号中的直流失调误差。 选择单个DC偏移校正算法以由信号质量估计器组件确定使用。 直接转换接收机的DC偏移校正分量确定适合于特定操作环境的适当DC偏移校正算法。 设置信号质量估计的标准来控制DCOC算法之间的转换。 可以采用双阈值策略来在一个DC偏移校正算法和另一个DC偏移校正算法之间转换以提供滞后。