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    • 9. 发明授权
    • Impedance measurement in an active radio frequency transmitter
    • 有源射频发射机中的阻抗测量
    • US08452245B2
    • 2013-05-28
    • US13412661
    • 2012-03-06
    • Brian Walker
    • Brian Walker
    • H03C1/62
    • H04B1/0458H04B17/10
    • A transmitter and method for determining impedance measurement in an active radio frequency transmitter of an antenna are provided. Voltage and current samples are obtained from a modulating signal delivered to an antenna. The voltage and current samples are converted from analog to digital format, and decimation occurs to reduce the number of samples. Complex demodulation is performed of each of the voltage and current samples to baseband levels and decimation of the voltage and current samples is performed to reduce the number of samples. An impedance estimate can then be estimated from the voltage and current samples.
    • 提供了一种用于确定天线的有源射频发射机中的阻抗测量的发射机和方法。 从传送到天线的调制信号获得电压和电流采样。 电压和电流样本从模拟转换为数字格式,并进行抽取以减少样本数量。 执行每个电压和电流采样到基带电平的复杂解调,并执行电压和电流采样的抽取以减少样本数量。 然后可以从电压和电流样本估计阻抗估计。