公开(公告)号：US08817834B2

公开(公告)日：2014-08-26

申请号：US13462717

申请日：2012-05-02

申请人： Yongtao Wang ,  Curtis Ling ,  Tim Gallagher

发明人： Yongtao Wang ,  Curtis Ling ,  Tim Gallagher

IPC分类号： H01S3/14 ,  H04N9/73 ,  A61B5/04 ,  H04L27/38

CPC分类号： H04L27/3863 ,  H04L27/2334 ,  H04L27/2338 ,  H04L27/361 ,  H04L27/366

摘要： Methods and systems for I/Q mismatch calibration and compensation for wideband communication receivers may comprise receiving a plurality of radio frequency (RF) channels, downconverting the received plurality of received RF channels to baseband frequencies, determining and removing average in-phase (I) and quadrature (Q) gain and phase mismatch of the downconverted channels, determining a residual phase and amplitude tilt of the downconverted channels with removed average I and Q gain and phase mismatch, and compensating for said residual phase and amplitude tilt I and Q gain and phase mismatch of the downconverted channels. The determined phase tilt may be compensated utilizing a phase tilt correction filter, which may comprise one or more all-pass filters. The average I and Q gain and phase mismatch may be determined utilizing a blind source separation (BSS) estimation algorithm.

摘要翻译： 用于宽带通信接收机的I / Q失配校准和补偿的方法和系统可以包括：接收多个射频（RF）信道，将接收的多个接收的RF信道下变频到基带频率，确定和去除平均同相（I） 和下变频信道的正交（Q）增益和相位失配，确定下变频信道的剩余相位和振幅倾斜，其中去除了平均I和Q增益和相位失配，并补偿所述剩余相位和振幅倾斜I和Q增益， 下变频通道的相位失配。 可以使用可以包括一个或多个全通滤波器的相位倾斜校正滤波器来补偿确定的相位倾斜。 可以使用盲源分离（BSS）估计算法来确定平均I和Q增益和相位失配。

公开(公告)号：US20120281787A1

公开(公告)日：2012-11-08

申请号：US13462717

申请日：2012-05-02

申请人： Yongtao Wang ,  Curtis Ling ,  Tim Gallagher

发明人： Yongtao Wang ,  Curtis Ling ,  Tim Gallagher

IPC分类号： H03K9/00

CPC分类号： H04L27/3863 ,  H04L27/2334 ,  H04L27/2338 ,  H04L27/361 ,  H04L27/366

摘要： Methods and systems for I/Q mismatch calibration and compensation for wideband communication receivers may comprise receiving a plurality of radio frequency (RF) channels, downconverting the received plurality of received RF channels to baseband frequencies, determining and removing average in-phase (I) and quadrature (Q) gain and phase mismatch of the downconverted channels, determining a residual phase and amplitude tilt of the downconverted channels with removed average I and Q gain and phase mismatch, and compensating for said residual phase and amplitude tilt I and Q gain and phase mismatch of the downconverted channels. The determined phase tilt may be compensated utilizing a phase tilt correction filter, which may comprise one or more all-pass filters. The average I and Q gain and phase mismatch may be determined utilizing a blind source separation (BSS) estimation algorithm.

摘要翻译： 用于宽带通信接收机的I / Q失配校准和补偿的方法和系统可以包括：接收多个射频（RF）信道，将接收的多个接收的RF信道下变频到基带频率，确定和去除平均同相（I） 和下变频信道的正交（Q）增益和相位失配，确定下变频信道的剩余相位和振幅倾斜，其中去除了平均I和Q增益和相位失配，并补偿所述剩余相位和振幅倾斜I和Q增益， 下变频通道的相位失配。 可以使用可以包括一个或多个全通滤波器的相位倾斜校正滤波器来补偿确定的相位倾斜。 可以使用盲源分离（BSS）估计算法来确定平均I和Q增益和相位失配。

公开(公告)号：US07852247B2

公开(公告)日：2010-12-14

申请号：US11863999

申请日：2007-09-28

申请人： Khurram Muhammad ,  Yongtao Wang ,  Imtinan Elahi

发明人： Khurram Muhammad ,  Yongtao Wang ,  Imtinan Elahi

IPC分类号： H03M3/00

CPC分类号： H03M3/344 ,  H03M3/40 ,  H03M3/454 ,  H03M3/456

摘要： One embodiment of the invention includes a mixed-signal filter. The mixed-signal filter comprises an analog signal path configured to process a first analog signal and an analog-to-digital converter (ADC) configured to convert the processed first analog signal to a digital signal. The mixed-signal filter also comprises a programmable digital feedback filter configured to filter the digital signal and a digital-to-analog converter (DAC) configured to convert the filtered digital signal to a second analog signal. The mixed-signal filter further comprises a signal combiner configured to combine an analog input signal of the mixed-signal filter and the second analog signal to generate the first analog signal.

摘要翻译： 本发明的一个实施例包括混合信号滤波器。 混合信号滤波器包括被配置为处理第一模拟信号的模拟信号路径和被配置为将经处理的第一模拟信号转换为数字信号的模拟 - 数字转换器（ADC）。 混合信号滤波器还包括被配置为对数字信号进行滤波的可编程数字反馈滤波器和被配置为将经滤波的数字信号转换为第二模拟信号的数模转换器（DAC）。 混合信号滤波器还包括信号组合器，其被配置为组合混合信号滤波器的模拟输入信号和第二模拟信号以产生第一模拟信号。

公开(公告)号：US20110037473A1

公开(公告)日：2011-02-17

申请号：US12924268

申请日：2010-09-22

申请人： Zhanxiang He ,  Weibin Sun ,  Yongtao Wang ,  Deqiang Tao ,  Zuzhi Hu ,  Weifeng Luo ,  Yue Zhang

发明人： Zhanxiang He ,  Weibin Sun ,  Yongtao Wang ,  Deqiang Tao ,  Zuzhi Hu ,  Weifeng Luo ,  Yue Zhang

IPC分类号： G01V3/02

CPC分类号： G01V3/082

摘要： Disclosed herein is a three dimensional small bin electromagnetic consecutive array data acquisition method used in oil exploration comprising the steps of recording data using small bin lattices on execution of arrangement electrodes, each acquisition station (Ex, Ey) records the natural electromagnetic field time series data with the same acquisition parameter simultaneously; interference is removed first, for recorded data processing to get interference-free data; for border points and center point, the recording point serves as center point, and the same component from adjacent two points to total points area added together to obtain the average value of electric field data at time domain for each observation point; for corner points, the average values of the same electric field component from adjacent two points to total survey points toward bin direction is calculated; the electric field components acquired in maximum space serve as the new electric field values respectively; new time series data acquired in which the noise and the static shift effect have been suppressed, and apparent resistivity and phase curves of each point are acquired after processing with conventional method.

摘要翻译： 本发明公开了一种油勘探中使用的三维小箱电磁连续阵列数据采集方法，包括以下步骤：在排列电极执行时记录数据，每个采集站（Ex，Ey）记录自然电磁场时间序列数据 同时采集相同的采集参数; 干扰首先被去除，用于记录数据处理以获得无干扰的数据; 对于边界点和中心点，记录点作为中心点，从相邻两点到总点区域的相同分量相加，以获得每个观测点在时域的电场数据的平均值; 对于角点，计算从相邻两点到总测量点到箱方向的相同电场分量的平均值; 在最大空间中获取的电场分量分别用作新的电场值; 在传统方法处理之后，获取已经抑制了噪声和静态移位效应的新时间序列数据，并且每个点的视电阻率和相位曲线被获取。

公开(公告)号：US20100123466A1

公开(公告)日：2010-05-20

申请号：US12272008

申请日：2008-11-17

申请人： Yongtao Wang ,  Khurram Muhammad

发明人： Yongtao Wang ,  Khurram Muhammad

IPC分类号： G01R27/02

CPC分类号： H04B1/123

摘要： A system and method for corner frequency compensation in a wireless receiver. A method comprises computing a corner frequency of a filter, and determining if the computed corner frequency is different from a desired corner frequency by less than a threshold. The method further comprises if the computed corner frequency differs from the desired corner frequency by more than the threshold, adjusting parameters of the filter to alter the corner frequency, and repeating the computing and the determining. The method additionally comprises if the computed corner frequency differs from the desired corner frequency by less than the threshold, leaving the parameters of the filter unchanged. The computing uses a measured phase response of the filter at a frequency outside of a passband of the filter.

摘要翻译： 一种用于无线接收机中角落频率补偿的系统和方法。 一种方法包括计算滤波器的转角频率，以及确定计算出的转角频率是否与期望转角频率相差小于阈值。 该方法还包括如果所计算的转角频率与期望转角频率不同于阈值，则调整滤波器的参数以改变拐角频率，并重复计算和确定。 该方法还包括如果所计算的转角频率与期望转角频率不同于阈值，则保持滤波器的参数不变。 该计算使用滤波器在滤波器通带外的频率处的测量相位响应。

公开(公告)号：US20090170445A1

公开(公告)日：2009-07-02

申请号：US12049995

申请日：2008-03-17

申请人： Yongtao Wang ,  Khurram Muhammad

发明人： Yongtao Wang ,  Khurram Muhammad

IPC分类号： H04B1/40

CPC分类号： H04B1/1027 ,  H03J3/08 ,  H03J2200/32

摘要： A system and method for tuning baseband filters in wireless transceivers. A method comprises coupling a radio frequency (RF) signal generated by the wireless transmitter at an input of a wireless receiver, the RF signal having a desired frequency, measuring a magnitude of the coupled RF signal at an output of an analog-to-digital converter at an output of an analog baseband filter, wherein the magnitude is measured at the desired frequency, and adjusting a corner frequency of the analog baseband filter in response to the determining that the measured magnitude differs from a specified value.

摘要翻译： 一种用于调谐无线收发器中基带滤波器的系统和方法。 一种方法包括在无线接收机的输入处耦合由无线发射机产生的射频（RF）信号，所述RF信号具有期望的频率，在模数转换器的输出处测量耦合RF信号的幅度 转换器，其中所述幅度以期望的频率被测量，并且响应于确定所测量的幅度与指定值的不同而调整所述模拟基带滤波器的转角频率。

公开(公告)号：US08330464B2

公开(公告)日：2012-12-11

申请号：US12924268

申请日：2010-09-22

申请人： Zhanxiang He ,  Weibin Sun ,  Yongtao Wang ,  Deqiang Tao ,  Zuzhi Hu ,  Weifeng Luo ,  Yue Zhang

发明人： Zhanxiang He ,  Weibin Sun ,  Yongtao Wang ,  Deqiang Tao ,  Zuzhi Hu ,  Weifeng Luo ,  Yue Zhang

IPC分类号： G01V3/08

CPC分类号： G01V3/082

摘要： Disclosed herein is a three dimensional small bin electromagnetic consecutive array data acquisition method used in oil exploration comprising the steps of recording data using small bin lattices on execution of arrangement electrodes, each acquisition station (Ex, Ey) records the natural electromagnetic field time series data with the same acquisition parameter simultaneously; interference is removed first, for recorded data processing to get interference-free data; for border points and center point, the recording point serves as center point, and the same component from adjacent two points to total points area added together to obtain the average value of electric field data at time domain for each observation point; for corner points, the average values of the same electric field component from adjacent two points to total survey points toward bin direction is calculated; the electric field components acquired in maximum space serve as the new electric field values respectively; new time series data acquired in which the noise and the static shift effect have been suppressed, and apparent resistivity and phase curves of each point are acquired after processing with conventional method.

摘要翻译： 本发明公开了一种油勘探中使用的三维小箱电磁连续阵列数据采集方法，包括以下步骤：在排列电极执行时记录数据，每个采集站（Ex，Ey）记录自然电磁场时间序列数据 同时采集相同的采集参数; 干扰首先被去除，用于记录数据处理以获得无干扰的数据; 对于边界点和中心点，记录点作为中心点，从相邻两点到总点区域的相同分量相加，以获得每个观测点在时域的电场数据的平均值; 对于角点，计算从相邻两点到总测量点到箱方向的相同电场分量的平均值; 在最大空间中获取的电场分量分别用作新的电场值; 在传统方法处理之后，获取已经抑制了噪声和静态移位效应的新时间序列数据，并且每个点的视电阻率和相位曲线被获取。

公开(公告)号：US08428526B2

公开(公告)日：2013-04-23

申请号：US12049995

申请日：2008-03-17

申请人： Yongtao Wang ,  Khurram Muhammad

发明人： Yongtao Wang ,  Khurram Muhammad

IPC分类号： H04B1/04 ,  H04K3/00

CPC分类号： H04B1/1027 ,  H03J3/08 ,  H03J2200/32

摘要： A system and method for tuning baseband filters in wireless transceivers. A method comprises coupling a radio frequency (RF) signal generated by the wireless transmitter at an input of a wireless receiver, the RF signal having a desired frequency, measuring a magnitude of the coupled RF signal at an output of an analog-to-digital converter at an output of an analog baseband filter, wherein the magnitude is measured at the desired frequency, and adjusting a corner frequency of the analog baseband filter in response to the determining that the measured magnitude differs from a specified value.

摘要翻译： 一种用于调谐无线收发器中基带滤波器的系统和方法。 一种方法包括在无线接收机的输入处耦合由无线发射机产生的射频（RF）信号，所述RF信号具有期望的频率，在模数转换器的输出处测量耦合RF信号的幅度 转换器，其中所述幅度以期望的频率被测量，并且响应于确定所测量的幅度与指定值的不同而调整所述模拟基带滤波器的转角频率。

公开(公告)号：US08170507B2

公开(公告)日：2012-05-01

申请号：US12260832

申请日：2008-10-29

申请人： Yongtao Wang ,  Khurram Waheed ,  Sameh S. Rezeq ,  Jaimin Mehta ,  Prasad Srinivasan ,  Khurram Muhammad

发明人： Yongtao Wang ,  Khurram Waheed ,  Sameh S. Rezeq ,  Jaimin Mehta ,  Prasad Srinivasan ,  Khurram Muhammad

IPC分类号： H04B1/04

CPC分类号： H03F3/24 ,  H03F1/3241 ,  H03F3/72 ,  H04B2001/0425

摘要： Predistortion methods and apparatus for transmitter linearization in a communication transceiver are disclosed. An example apparatus to linearize a digitally controlled pre-power amplifier included in a transmitter of a communication transceiver disclosed herein comprises a predistorter to predistort an input signal to be processed by the digitally controlled pre-power amplifier, a coupling path within the communication transceiver to couple an output of the digitally controlled pre-power amplifier to an input of a receiver included in the communication transceiver without enabling an output power amplifier stage of a multi-stage power amplifier coupled to an output of the digitally controlled pre-power amplifier, wherein no additional hardware components are required to implement the coupling path within the communication transceiver, and a predistortion evaluator comprising a predistortion calibrator and a predistortion compensator to process data demodulated by the receiver to generate and update predistortion values for use by the predistorter.

摘要翻译： 公开了用于通信收发器中的发射机线性化的预失真方法和装置。 线性化包括在本文公开的通信收发器的发射机中的数字控制的预功率放大器的示例性装置包括预失真器，用于预失真由数字控制的预功率放大器处理的输入信号，通信收发器内的耦合路径 将数字控制的预功率放大器的输出耦合到通信收发器中包括的接收器的输入，而不使能耦合到数字控制的预功率放大器的输出的多级功率放大器的输出功率放大器级，其中 不需要额外的硬件组件来实现通信收发信机内的耦合路径，以及预失真评估器，包括预失真校准器和预失真补偿器，用于处理由接收机解调的数据，以生成和更新预失真值供预失真器使用。

公开(公告)号：US20100105338A1

公开(公告)日：2010-04-29

申请号：US12260832

申请日：2008-10-29

申请人： Yongtao Wang ,  Khurram Waheed ,  Sameh S. Rezeq ,  Jaimin Mehta ,  Prasad Srinivasan ,  Khurram Muhammad

发明人： Yongtao Wang ,  Khurram Waheed ,  Sameh S. Rezeq ,  Jaimin Mehta ,  Prasad Srinivasan ,  Khurram Muhammad

IPC分类号： H04B1/62 ,  H03F1/32 ,  H04B1/40

CPC分类号： H03F3/24 ,  H03F1/3241 ,  H03F3/72 ,  H04B2001/0425

摘要： Predistortion methods and apparatus for transmitter linearization in a communication transceiver are disclosed. An example apparatus to linearize a digitally controlled pre-power amplifier included in a transmitter of a communication transceiver disclosed herein comprises a predistorter to predistort an input signal to be processed by the digitally controlled pre-power amplifier, a coupling path within the communication transceiver to couple an output of the digitally controlled pre-power amplifier to an input of a receiver included in the communication transceiver without enabling an output power amplifier stage of a multi-stage power amplifier coupled to an output of the digitally controlled pre-power amplifier, wherein no additional hardware components are required to implement the coupling path within the communication transceiver, and a predistortion evaluator comprising a predistortion calibrator and a predistortion compensator to process data demodulated by the receiver to generate and update predistortion values for use by the predistorter.

摘要翻译： 公开了用于通信收发器中的发射机线性化的预失真方法和装置。 线性化包括在本文公开的通信收发器的发射机中的数字控制的预功率放大器的示例性装置包括预失真器，用于预失真由数字控制的预功率放大器处理的输入信号，通信收发器内的耦合路径 将数字控制的预功率放大器的输出耦合到通信收发器中包括的接收器的输入，而不使能耦合到数字控制的预功率放大器的输出的多级功率放大器的输出功率放大器级，其中 不需要额外的硬件组件来实现通信收发信机内的耦合路径，以及预失真评估器，包括预失真校准器和预失真补偿器，用于处理由接收机解调的数据，以生成和更新预失真值供预失真器使用。