公开(公告)号：US20130109442A1

公开(公告)日：2013-05-02

申请号：US13492279

申请日：2012-06-08

申请人： Sriraman DAKSHINAMURTHY ,  Robert LORENZ

发明人： Sriraman DAKSHINAMURTHY ,  Robert LORENZ

IPC分类号： H03G3/20 ,  H04B1/40

CPC分类号： H03G3/20 ,  H03G3/3047 ,  H04B1/40

摘要： Embodiments provide systems and methods for producing an envelope tracking (ET) PA supply voltage with minimum headroom relative to the desired RF output signal of the PA. In an embodiment, the PA supply voltage is generated by applying an ET signal to an ET path of the wireless device, and by further applying pre-emphasis to the ET signal to compensate for a frequency response of the ET path. Embodiments operate by estimating the frequency response of the ET path and determining the pre-emphasis based on the estimate of the frequency response of the ET path. In embodiments, the pre-emphasis is applied using a pre-emphasis filter, which may be within or outside of the ET path. Further, the pre-emphasis may be applied to the ET signal in digital or analog form.

摘要翻译： 实施例提供用于产生相对于PA的期望RF输出信号具有最小净空的包络跟踪（ET）PA供电电压的系统和方法。 在一个实施例中，通过将ET信号施加到无线设备的ET路径，并且进一步对ET信号进行预加重以补偿ET路径的频率响应来产生PA供电电压。 实施例通过估计ET路径的频率响应并基于ET路径的频率响应的估计来确定预加重来进行操作。 在实施例中，使用可以在ET路径内或外的预加重滤波器来应用预加重。 此外，预加重可以数字或模拟形式应用于ET信号。

公开(公告)号：US20120270511A1

公开(公告)日：2012-10-25

申请号：US13452756

申请日：2012-04-20

申请人： Sriraman DAKSHINAMURTHY ,  Mohamed Mostafa ,  Derek Shaeffer ,  Dennis Pu ,  Peter Capofreddi

发明人： Sriraman DAKSHINAMURTHY ,  Mohamed Mostafa ,  Derek Shaeffer ,  Dennis Pu ,  Peter Capofreddi

IPC分类号： H04B17/00 ,  H03G3/00

CPC分类号： H03G3/3042 ,  H04B17/13

摘要： Embodiments of the present disclosure provide systems and methods for estimating gain and phase error in a wireless transmitter. Embodiments of the present disclosure provide a gain and phase controller that uses a digital gain and phase estimator to jointly estimate both gain and phase. The forward and feedback signals of a wireless transmitter are digitized using analog to digital (ADC) converters. The digital signals are correlated with each other to dynamically extract gain and phase estimates of the loop. The gain and phase estimates are used to correct gain and phase errors in the wireless transmitter.

摘要翻译： 本公开的实施例提供了用于估计无线发射机中的增益和相位误差的系统和方法。 本公开的实施例提供增益和相位控制器，其使用数字增益和相位估计器来共同估计增益和相位。 无线发射机的正向和反馈信号使用模数（ADC）转换器进行数字化。 数字信号彼此相关，以动态地提取循环的增益和相位估计。 增益和相位估计用于校正无线发射机中的增益和相位误差。