Incident and reflected signal phase difference detection

    公开(公告)号:US08170509B2

    公开(公告)日:2012-05-01

    申请号:US12422070

    申请日:2009-04-10

    IPC分类号: H03C1/52

    CPC分类号: H04B1/0458

    摘要: Embodiments include methods and apparatus for detecting a phase angle between an incident signal and a reflected signal. The apparatus comprises a plurality of phase shifters and additional circuitry. The plurality of phase shifters is adapted to apply first phase shifts to a representation of the incident signal and to apply second phase shifts to a representation of the reflected signal. The additional circuitry, which is operatively coupled to the plurality of phase shifters, is adapted to produce a first indication of a location of a relative phase difference between the incident signal and the reflected signal within a first region of a first reference circle, and to produce a second indication of the location of the relative phase difference within a second region of a second reference circle, wherein the second reference circle is rotated with respect to the first reference circle.

    SYSTEMS, APPARATUS AND METHOD FOR PERFORMING DIGITAL PRE-DISTORTION BASED ON LOOKUP TABLE GAIN VALUES
    2.
    发明申请
    SYSTEMS, APPARATUS AND METHOD FOR PERFORMING DIGITAL PRE-DISTORTION BASED ON LOOKUP TABLE GAIN VALUES 有权
    基于查询表增益值进行数字预失真的系统,装置和方法

    公开(公告)号:US20080243899A1

    公开(公告)日:2008-10-02

    申请号:US11693897

    申请日:2007-03-30

    IPC分类号: G06F17/00

    摘要: A system (100, FIG. 1) performs digital pre-distortion using gain values stored in a lookup table (150). A method for performing digital pre-distortion includes identifying (310, FIG. 3) a lookup table entry, based on input data, and updating the lookup table entry by writing an updated gain value into the lookup table entry. In an embodiment, update tracking information corresponding to the lookup table entry may be updated (324) to indicate that the lookup table entry has been updated. Another embodiment includes identifying (412, FIG. 4) consecutive lookup table entries based on input data, determining (413) whether the consecutive lookup table entries have been previously updated, and performing (414) a weighted interpolation process to produce an output gain value. A previous gain value (158, FIG. 1) is used in the weighted interpolation process when at least one of the consecutive lookup table entries has not been updated.

    摘要翻译: 系统(100,图1)使用存储在查找表(150)中的增益值来执行数字预失真。 一种用于执行数字预失真的方法包括:基于输入数据识别(310,图3)查找表条目,并通过将更新的增益值写入查找表条目来更新查找表条目。 在一个实施例中,可以更新对应于查找表条目的更新跟踪信息(324)以指示查找表条目已被更新。 另一个实施例包括基于输入数据识别(412,图4)连续查找表条目,确定(413)连续查找表条目是否已经被更新过,并且执行(414)加权内插处理以产生输出增益值 。 当连续查找表条目中的至少一个尚未更新时,在加权内插处理中使用先前的增益值(158,图1)。

    Method for altering a difference frequency signal and amplifier circuit
thereof
    4.
    发明授权
    Method for altering a difference frequency signal and amplifier circuit thereof 失效
    用于改变其差频信号及其放大器电路的方法

    公开(公告)号:US5748042A

    公开(公告)日:1998-05-05

    申请号:US686876

    申请日:1996-07-26

    IPC分类号: H03F1/32

    CPC分类号: H03F1/3205

    摘要: A method and amplifier circuit (20) for conditioning a signal. The amplifier circuit (20) includes a field effect transistor (22) having a sub-harmonic termination (21) connected to a drain of the field effect transistor (22). In addition, an output impedance termination (24) is connected to the drain of the field effect transistor (22) and an input impedance termination (23) is connected to the gate of the field effect transistor (22). The sub-harmonic termination (21) reduces a non-linear component of an interference signal.

    摘要翻译: 一种用于调节信号的方法和放大器电路(20)。 放大器电路(20)包括具有连接到场效应晶体管(22)的漏极的次谐波端接(21)的场效应晶体管(22)。 此外,输出阻抗端接(24)连接到场效应晶体管(22)的漏极,并且输入阻抗端接(23)连接到场效应晶体管(22)的栅极。 次谐波终端(21)降低干扰信号的非线性分量。

    Incident and reflected signal phase difference detection
    6.
    发明授权
    Incident and reflected signal phase difference detection 有权
    事件和反射信号相位差检测

    公开(公告)号:US08311495B2

    公开(公告)日:2012-11-13

    申请号:US13457874

    申请日:2012-04-27

    IPC分类号: H03C1/52

    CPC分类号: H04B1/0458

    摘要: Embodiments include methods and apparatus for detecting a phase angle between an incident signal and a reflected signal. The apparatus comprises a plurality of phase shifters and additional circuitry. The plurality of phase shifters is adapted to apply first phase shifts to a representation of the incident signal and to apply second phase shifts to a representation of the reflected signal. The additional circuitry, which is operatively coupled to the plurality of phase shifters, is adapted to produce a first indication of a location of a relative phase difference between the incident signal and the reflected signal within a first region of a first reference circle, and to produce a second indication of the location of the relative phase difference within a second region of a second reference circle, wherein the second reference circle is rotated with respect to the first reference circle.

    摘要翻译: 实施例包括用于检测入射信号和反射信号之间的相位角的方法和装置。 该装置包括多个移相器和附加电路。 多个移相器适于将第一相移施加到入射信号的表示,并将第二相移施加到反射信号的表示。 可操作地耦合到多个移相器的附加电路适于产生在第一参考圆的第一区域内的入射信号和反射信号之间的相对相位差的位置的第一指示,并且 在第二参考圆的第二区域内产生相对相位的位置的第二指示,其中第二参考圆相对于第一参考圆旋转。

    Systems, apparatus and method for performing digital pre-distortion based on lookup table gain values
    7.
    发明授权
    Systems, apparatus and method for performing digital pre-distortion based on lookup table gain values 有权
    基于查找表增益值执行数字预失真的系统,装置和方法

    公开(公告)号:US07957707B2

    公开(公告)日:2011-06-07

    申请号:US11693897

    申请日:2007-03-30

    IPC分类号: H04B1/04 H01Q11/12

    摘要: A system (100, FIG. 1) performs digital pre-distortion using gain values stored in a lookup table (150). A method for performing digital pre-distortion includes identifying (310, FIG. 3) a lookup table entry, based on input data, and updating the lookup table entry by writing an updated gain value into the lookup table entry. In an embodiment, update tracking information corresponding to the lookup table entry may be updated (324) to indicate that the lookup table entry has been updated. Another embodiment includes identifying (412, FIG. 4) consecutive lookup table entries based on input data, determining (413) whether the consecutive lookup table entries have been previously updated, and performing (414) a weighted interpolation process to produce an output gain value. A previous gain value (158, FIG. 1) is used in the weighted interpolation process when at least one of the consecutive lookup table entries has not been updated.

    摘要翻译: 系统(100,图1)使用存储在查找表(150)中的增益值来执行数字预失真。 一种用于执行数字预失真的方法包括:基于输入数据识别(310,图3)查找表条目,并通过将更新的增益值写入查找表条目来更新查找表条目。 在一个实施例中,可以更新对应于查找表条目的更新跟踪信息(324)以指示查找表条目已被更新。 另一个实施例包括基于输入数据识别(412,图4)连续查找表条目,确定(413)连续查找表条目是否已经被更新过,并且执行(414)加权内插处理以产生输出增益值 。 当连续查找表条目中的至少一个尚未更新时,在加权内插处理中使用先前的增益值(158,图1)。

    Adaptive pre-distortion with interference detection and mitigation
    8.
    发明授权
    Adaptive pre-distortion with interference detection and mitigation 有权
    具有干扰检测和缓解的自适应预失真

    公开(公告)号:US07929927B2

    公开(公告)日:2011-04-19

    申请号:US11927241

    申请日:2007-10-29

    IPC分类号: H04B1/04 H03C1/62

    摘要: Embodiments include methods, apparatus, and electronic systems adapted to perform adaptive pre-distortion. Embodiments include combining an input sample with a gain value to generate a pre-distorted data sample, where the gain value is a function of at least one gain entry stored within a gain lookup table. An amplified analog signal is generated from the pre-distorted data sample, and a feedback sample is also generated, which corresponds to an antenna output signal. The antenna output signal includes the amplified analog signal. A difference indicator is generated to reflect a difference between the input sample and the feedback sample, and at least one updated gain value is generated based on a comparison between the difference indicator and at least one previous difference indicator. At least one gain entry within the gain lookup table is updated with the at least one updated gain value.

    摘要翻译: 实施例包括适于执行自适应预失真的方法,装置和电子系统。 实施例包括将输入样本与增益值组合以生成预失真数据样本,其中增益值是存储在增益查找表内的至少一个增益条目的函数。 从预失真的数据样本产生放大的模拟信号,并且还产生对应于天线输出信号的反馈样本。 天线输出信号包括放大的模拟信号。 生成差异指示符以反映输入样本和反馈样本之间的差异,并且基于差异指示符与至少一个先前差异指标之间的比较来生成至少一个更新的增益值。 增益查找表内的至少一个增益条目用至少一个更新的增益值更新。

    LOAD INSENSITIVE BALANCED POWER AMPLIFIER AND RELATED OPERATING METHOD
    9.
    发明申请
    LOAD INSENSITIVE BALANCED POWER AMPLIFIER AND RELATED OPERATING METHOD 有权
    负载平衡功率放大器及相关操作方法

    公开(公告)号:US20090179704A1

    公开(公告)日:2009-07-16

    申请号:US12013149

    申请日:2008-01-11

    IPC分类号: H03F3/68

    摘要: A balanced power amplifier that is insensitive to load line variations is provided. The balanced power amplifier is suitable for use in wireless transmitter applications, such as cellular telephones, mobile computing devices, and portable communication devices. An embodiment of such a balanced power amplifier includes an input coupler, first and second amplifier devices, and a level adjustment component. The input coupler generates a first signal component and a second signal component from an input signal, where the first signal component and the second signal component are out of phase relative to one another. The first amplifier device generates a first output signal that is influenced by the first signal component, and the second amplifier device generates a second output signal that is influenced by the second signal component. The level adjustment component is coupled between the input coupler device and the input of the first amplifier device. The level adjustment component performs signal level tuning on its input signal. The signal level tuning is adaptively performed in response to the impedance characteristics of the load being driven by the balanced power amplifier.

    摘要翻译: 提供对负载线变化不敏感的平衡功率放大器。 平衡功率放大器适用于无线发射机应用,例如蜂窝电话,移动计算设备和便携式通信设备。 这种平衡功率放大器的实施例包括输入耦合器,第一和第二放大器装置以及电平调整部件。 输入耦合器从输入信号产生第一信号分量和第二信号分量,其中第一信号分量和第二信号分量相对于彼此异相。 第一放大器装置产生受第一信号分量影响的第一输出信号,第二放大器装置产生受第二信号分量影响的第二输出信号。 电平调节组件耦合在输入耦合器装置和第一放大器装置的输入端之间。 电平调整组件对其输入信号进行信号电平调谐。 响应于由平衡功率放大器驱动的负载的阻抗特性,自适应地执行信号电平调谐。

    ADAPTIVE PRE-DISTORTION WITH INTERFERENCE DETECTION AND MITIGATION
    10.
    发明申请
    ADAPTIVE PRE-DISTORTION WITH INTERFERENCE DETECTION AND MITIGATION 有权
    具有干扰检测和缓解的自适应预失真

    公开(公告)号:US20090111399A1

    公开(公告)日:2009-04-30

    申请号:US11927241

    申请日:2007-10-29

    IPC分类号: H04B1/00

    摘要: Embodiments include methods, apparatus, and electronic systems adapted to perform adaptive pre-distortion. Embodiments include combining an input sample with a gain value to generate a pre-distorted data sample, where the gain value is a function of at least one gain entry stored within a gain lookup table. An amplified analog signal is generated from the pre-distorted data sample, and a feedback sample is also generated, which corresponds to an antenna output signal. The antenna output signal includes the amplified analog signal. A difference indicator is generated to reflect a difference between the input sample and the feedback sample, and at least one updated gain value is generated based on a comparison between the difference indicator and at least one previous difference indicator. At least one gain entry within the gain lookup table is updated with the at least one updated gain value.

    摘要翻译: 实施例包括适于执行自适应预失真的方法,装置和电子系统。 实施例包括将输入样本与增益值组合以生成预失真数据样本,其中增益值是存储在增益查找表内的至少一个增益条目的函数。 从预失真的数据样本产生放大的模拟信号,并且还产生对应于天线输出信号的反馈样本。 天线输出信号包括放大的模拟信号。 生成差异指示符以反映输入样本和反馈样本之间的差异,并且基于差异指示符与至少一个先前差异指标之间的比较来生成至少一个更新的增益值。 增益查找表内的至少一个增益条目用至少一个更新的增益值更新。