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1. 发明申请

US20120300878A1 DYNAMIC DIGITAL PRE-DISTORTION SYSTEM 有权
标题翻译：动态数字预失真系统
公开(公告)号：US20120300878A1
公开(公告)日：2012-11-29
申请号：US13567724
申请日：2012-08-06
申请人： Khiem V. Cai , David B. Rutan , Ahmad Khanifar , Armando C. Cova
发明人： Khiem V. Cai , David B. Rutan , Ahmad Khanifar , Armando C. Cova
IPC分类号： H04L25/49
CPC分类号： H04B1/62 , H03F1/3241 , H03F1/3247 , H03F1/3294 , H03F3/24 , H03F2200/336 , H03F2200/451 , H03F2201/3224 , H04B1/0475 , H04B17/13 , H04B2001/0425 , H04W52/52
摘要： A Dynamic Digital Pre-Distortion (DDPD) system is disclosed to rapidly correct power amplifier (PA) non-linearity and memory effects. To perform pre-distortion, a DDPD engine predistorts an input signal in order to cancel PA nonlinearities as the signal is amplified by the PA. The DDPD engine is implemented as a composite of one linear filter and N−1 high order term linear filters. The bank of linear filters have programmable complex coefficients. To compute the coefficients, samples from the transmit path and a feedback path are captured, and covariance matrices A and B are computed using optimized hardware. After the covariance matrices are computed, Gaussian elimination processing may be employed to compute the coefficients. Mathematical and hardware optimizations may be employed to simplify and reduce the number of multiplication operands and other operations, which can enable the DDPD system to fit within a single chip.
摘要翻译：公开了动态数字预失真（DDPD）系统来快速校正功率放大器（PA）的非线性和记忆效应。为了执行预失真，DDPD引擎预失真输入信号，以便随着信号被PA放大而取消PA非线性。 DDPD引擎实现为一个线性滤波器和N-1个高阶项线性滤波器的组合。线性滤波器组具有可编程的复系数。为了计算系数，捕获来自发射路径和反馈路径的样本，并使用优化的硬件来计算协方差矩阵A和B. 在协方差矩阵被计算之后，可以采用高斯消去处理来计算系数。可以采用数学和硬件优化来简化和减少乘法操作数和其他操作的数量，这可以使DDPD系统适合于单个芯片内。

2. 发明授权

US08259843B2 Dynamic digital pre-distortion system 有权
标题翻译：动态数字预失真系统
公开(公告)号：US08259843B2
公开(公告)日：2012-09-04
申请号：US13198891
申请日：2011-08-05
申请人： Khiem V. Cai , David B. Rutan , Ahmad Khanifar , Armando C. Cova
发明人： Khiem V. Cai , David B. Rutan , Ahmad Khanifar , Armando C. Cova
IPC分类号： H04L27/00
CPC分类号： H04B1/62 , H03F1/3241 , H03F1/3247 , H03F1/3294 , H03F3/24 , H03F2200/336 , H03F2200/451 , H03F2201/3224 , H04B1/0475 , H04B17/13 , H04B2001/0425 , H04W52/52
摘要： A Dynamic Digital Pre-Distortion (DDPD) system is disclosed to rapidly correct power amplifier (PA) non-linearity and memory effects. To perform pre-distortion, a DDPD engine predistorts an input signal in order to cancel PA nonlinearities as the signal is amplified by the PA. The DDPD engine is implemented as a composite of one linear filter and N−1 high order term linear filters. The bank of linear filters have programmable complex coefficients. To compute the coefficients, samples from the transmit path and a feedback path are captured, and covariance matrices A and B are computed using optimized hardware. After the covariance matrices are computed, Gaussian elimination processing may be employed to compute the coefficients. Mathematical and hardware optimizations may be employed to simplify and reduce the number of multiplication operands and other operations, which can enable the DDPD system to fit within a single chip.
摘要翻译：公开了动态数字预失真（DDPD）系统来快速校正功率放大器（PA）的非线性和记忆效应。为了执行预失真，DDPD引擎预失真输入信号，以便随着信号被PA放大而取消PA非线性。 DDPD引擎实现为一个线性滤波器和N-1个高阶项线性滤波器的组合。线性滤波器组具有可编程的复系数。为了计算系数，捕获来自发射路径和反馈路径的样本，并使用优化的硬件来计算协方差矩阵A和B. 在协方差矩阵被计算之后，可以采用高斯消去处理来计算系数。可以采用数学和硬件优化来简化和减少乘法操作数和其他操作的数量，这可以使DDPD系统适合于单个芯片内。

3. 发明授权

US08005162B2 Dynamic digital pre-distortion system 有权
标题翻译：动态数字预失真系统
公开(公告)号：US08005162B2
公开(公告)日：2011-08-23
申请号：US11788451
申请日：2007-04-20
申请人： Khiem V. Cai , David B. Rutan , Ahmad Khanifar , Armando C. Cova
发明人： Khiem V. Cai , David B. Rutan , Ahmad Khanifar , Armando C. Cova
IPC分类号： H04K1/02 , H04L25/03 , H04L25/49
CPC分类号： H04B1/62 , H03F1/3241 , H03F1/3247 , H03F1/3294 , H03F3/24 , H03F2200/336 , H03F2200/451 , H03F2201/3224 , H04B1/0475 , H04B17/13 , H04B2001/0425 , H04W52/52
摘要： A Dynamic Digital Pre-Distortion (DDPD) system is disclosed to rapidly correct power amplifier (PA) non-linearity and memory effects. To perform pre-distortion, a DDPD engine predistorts an input signal in order to cancel PA nonlinearities as the signal is amplified by the PA. The DDPD engine is implemented as a composite of one linear filter and N−1 high order term linear filters. The bank of linear filters have programmable complex coefficients. To compute the coefficients, samples from the transmit path and a feedback path are captured, and covariance matrices A and B are computed using optimized hardware. After the covariance matrices are computed, Gaussian elimination processing may be employed to compute the coefficients. Mathematical and hardware optimizations may be employed to simplify and reduce the number of multiplication operands and other operations, which can enable the DDPD system to fit within a single chip.
摘要翻译：公开了动态数字预失真（DDPD）系统来快速校正功率放大器（PA）的非线性和记忆效应。为了执行预失真，DDPD引擎预失真输入信号，以便随着信号被PA放大而取消PA非线性。 DDPD引擎实现为一个线性滤波器和N-1个高阶项线性滤波器的组合。线性滤波器组具有可编程的复系数。为了计算系数，捕获来自发射路径和反馈路径的样本，并使用优化的硬件来计算协方差矩阵A和B. 在协方差矩阵被计算之后，可以采用高斯消去处理来计算系数。可以采用数学和硬件优化来简化和减少乘法操作数和其他操作的数量，这可以使DDPD系统适合于单个芯片内。

4. 发明授权

US08588332B2 Dynamic digital pre-distortion system 有权
标题翻译：动态数字预失真系统
公开(公告)号：US08588332B2
公开(公告)日：2013-11-19
申请号：US13567724
申请日：2012-08-06
申请人： Khiem V. Cai , David B. Rutan , Ahmad Khanifar , Armando C. Cova
发明人： Khiem V. Cai , David B. Rutan , Ahmad Khanifar , Armando C. Cova
IPC分类号： H04K1/02 , H04L25/03 , H04L25/49
CPC分类号： H04B1/62 , H03F1/3241 , H03F1/3247 , H03F1/3294 , H03F3/24 , H03F2200/336 , H03F2200/451 , H03F2201/3224 , H04B1/0475 , H04B17/13 , H04B2001/0425 , H04W52/52
摘要： A Dynamic Digital Pre-Distortion (DDPD) system is disclosed to rapidly correct power amplifier (PA) non-linearity and memory effects. To perform pre-distortion, a DDPD engine predistorts an input signal in order to cancel PA nonlinearities as the signal is amplified by the PA. The DDPD engine is implemented as a composite of one linear filter and N−1 high order term linear filters. The bank of linear filters have programmable complex coefficients. To compute the coefficients, samples from the transmit path and a feedback path are captured, and covariance matrices A and B are computed using optimized hardware. After the covariance matrices are computed, Gaussian elimination processing may be employed to compute the coefficients. Mathematical and hardware optimizations may be employed to simplify and reduce the number of multiplication operands and other operations, which can enable the DDPD system to fit within a single chip.
摘要翻译：公开了动态数字预失真（DDPD）系统来快速校正功率放大器（PA）的非线性和记忆效应。为了执行预失真，DDPD引擎预失真输入信号，以便随着信号被PA放大而取消PA非线性。 DDPD引擎实现为一个线性滤波器和N-1个高阶项线性滤波器的组合。线性滤波器组具有可编程的复系数。为了计算系数，捕获来自发射路径和反馈路径的样本，并使用优化的硬件来计算协方差矩阵A和B. 在协方差矩阵被计算之后，可以采用高斯消去处理来计算系数。可以采用数学和硬件优化来简化和减少乘法操作数和其他操作的数量，这可以使DDPD系统适合于单个芯片内。

5. 发明申请

US20110286509A1 DYNAMIC DIGITAL PRE-DISTORTION SYSTEM 有权
标题翻译：动态数字预失真系统
公开(公告)号：US20110286509A1
公开(公告)日：2011-11-24
申请号：US13198891
申请日：2011-08-05
申请人： Khiem V. Cai , David B. Rutan , Ahmad Khanifar , Armando C. Cova
发明人： Khiem V. Cai , David B. Rutan , Ahmad Khanifar , Armando C. Cova
IPC分类号： H04L25/49 , H04B17/00
CPC分类号： H04B1/62 , H03F1/3241 , H03F1/3247 , H03F1/3294 , H03F3/24 , H03F2200/336 , H03F2200/451 , H03F2201/3224 , H04B1/0475 , H04B17/13 , H04B2001/0425 , H04W52/52
摘要： A Dynamic Digital Pre-Distortion (DDPD) system is disclosed to rapidly correct power amplifier (PA) non-linearity and memory effects. To perform pre-distortion, a DDPD engine predistorts an input signal in order to cancel PA nonlinearities as the signal is amplified by the PA. The DDPD engine is implemented as a composite of one linear filter and N−1 high order term linear filters. The bank of linear filters have programmable complex coefficients. To compute the coefficients, samples from the transmit path and a feedback path are captured, and covariance matrices A and B are computed using optimized hardware. After the covariance matrices are computed, Gaussian elimination processing may be employed to compute the coefficients. Mathematical and hardware optimizations may be employed to simplify and reduce the number of multiplication operands and other operations, which can enable the DDPD system to fit within a single chip.
摘要翻译：公开了动态数字预失真（DDPD）系统来快速校正功率放大器（PA）的非线性和记忆效应。为了执行预失真，DDPD引擎预失真输入信号，以便随着信号被PA放大而取消PA非线性。 DDPD引擎实现为一个线性滤波器和N-1个高阶项线性滤波器的组合。线性滤波器组具有可编程的复系数。为了计算系数，捕获来自发射路径和反馈路径的样本，并使用优化的硬件来计算协方差矩阵A和B. 在协方差矩阵被计算之后，可以采用高斯消去处理来计算系数。可以采用数学和硬件优化来简化和减少乘法操作数和其他操作的数量，这可以使DDPD系统适合于单个芯片内。

6. 发明申请

US20080260066A1 Dynamic digital pre-distortion system 有权
标题翻译：动态数字预失真系统
公开(公告)号：US20080260066A1
公开(公告)日：2008-10-23
申请号：US11788451
申请日：2007-04-20
申请人： Khiem V. Cai , David B. Rutan , Ahmad Khanifar , Armando C. Cova
发明人： Khiem V. Cai , David B. Rutan , Ahmad Khanifar , Armando C. Cova
IPC分类号： H04L25/49
CPC分类号： H04B1/62 , H03F1/3241 , H03F1/3247 , H03F1/3294 , H03F3/24 , H03F2200/336 , H03F2200/451 , H03F2201/3224 , H04B1/0475 , H04B17/13 , H04B2001/0425 , H04W52/52
摘要： A Dynamic Digital Pre-Distortion (DDPD) system is disclosed to rapidly correct power amplifier (PA) non-linearity and memory effects. To perform pre-distortion, a DDPD engine predistorts an input signal in order to cancel PA nonlinearities as the signal is amplified by the PA. The DDPD engine is implemented as a composite of one linear filter and N-1 high order term linear filters. The bank of linear filters have programmable complex coefficients. To compute the coefficients, samples from the transmit path and a feedback path are captured, and covariance matrices A and B are computed using optimized hardware. After the covariance matrices are computed, Gaussian elimination processing may be employed to compute the coefficients. Mathematical and hardware optimizations may be employed to simplify and reduce the number of multiplication operands and other operations, which can enable the DDPD system to fit within a single chip.
摘要翻译：公开了动态数字预失真（DDPD）系统来快速校正功率放大器（PA）的非线性和记忆效应。为了执行预失真，DDPD引擎预失真输入信号，以便随着信号被PA放大而取消PA非线性。 DDPD引擎实现为一个线性滤波器和N-1个高阶项线性滤波器的组合。线性滤波器组具有可编程的复系数。为了计算系数，捕获来自发射路径和反馈路径的样本，并使用优化的硬件来计算协方差矩阵A和B. 在协方差矩阵被计算之后，可以采用高斯消去处理来计算系数。可以采用数学和硬件优化来简化和减少乘法操作数和其他操作的数量，这可以使DDPD系统适合于单个芯片内。

7. 发明申请

US20050242875A1 High efficiency linear amplifier employing dynamically controlled back off 有权
标题翻译：采用动态控制回退的高效线性放大器
公开(公告)号：US20050242875A1
公开(公告)日：2005-11-03
申请号：US11081384
申请日：2005-03-16
申请人： Mark Gurvich , Ahmad Khanifar , Nikolai Maslennikov , Alexander Rabinovich
发明人： Mark Gurvich , Ahmad Khanifar , Nikolai Maslennikov , Alexander Rabinovich
IPC分类号： H03F1/02 , H03F1/32 , H03G3/20 , H03G3/30
CPC分类号： H03F1/32 , H03F1/0211 , H03F1/0222 , H03F1/0244 , H03G3/3042 , H03G2201/106 , H03G2201/206 , H03G2201/307
摘要： A high efficiency radio frequency (RF) power amplifier having dynamically controlled back off is disclosed. The RF input voltage is sampled by an adaptive analog signal processing circuit. The adaptive analog signal processing circuit controls the supply voltage to RF amplifier devices, such as LDMOS devices, which varies the efficiency or back off of the power amplifier. The variable supply voltage in turn varies peak power of the amplifier.
摘要翻译：公开了具有动态控制的退避的高效率射频（RF）功率放大器。 RF输入电压由自适应模拟信号处理电路采样。自适应模拟信号处理电路控制对诸如LDMOS器件的RF放大器器件的电源电压，这些器件改变功率放大器的效率或退避。可变电源电压又会改变放大器的峰值功率。

8. 发明授权

US08928404B2 Amplifier performance stabilization through preparatory phase 有权
标题翻译：放大器性能稳定通过准备阶段
公开(公告)号：US08928404B2
公开(公告)日：2015-01-06
申请号：US13468976
申请日：2012-05-10
申请人： Ahmad Khanifar , Yatin Buch , George Sideris , Khurram Sheikh , Alexander Rabinovich
发明人： Ahmad Khanifar , Yatin Buch , George Sideris , Khurram Sheikh , Alexander Rabinovich
IPC分类号： H03F1/26 , H03F3/60 , H03F1/02 , H03F1/30 , H03F1/32 , H03F3/24 , H04B1/04
CPC分类号： H03F3/602 , H03F1/0288 , H03F1/30 , H03F1/3241 , H03F1/3247 , H03F3/245 , H03F2200/198 , H03F2200/321 , H03F2200/447 , H04B2001/0425
摘要： A method and related systems for amplifier performance stabilization of a digitally predistorted RF power amplifier are disclosed. The characteristics of power amplifiers change as a function of temperature making adaptive digital predistortion highly problematic during initial application of an RF signal to a power amplifier. Embodiments disclose a method and systems in which the power amplifier is taken through a preparatory phase before the RF signal is applied to the power amplifier and the digital predistortion calculation starts. This is achieved by increasing the quiescent current of the power stages beyond nominal values for a rapid warm up and readjusting to its normal bias point when the radio frequency signal is applied and the digital predistortion is turned on.
摘要翻译：公开了一种用于数字预失真RF功率放大器的放大器性能稳定的方法和相关系统。功率放大器的特性随温度的变化而变化，使自适应数字预失真在将RF信号初始应用于功率放大器时存在高度的问题。实施例公开了一种方法和系统，其中功率放大器在将RF信号施加到功率放大器之前通过准备阶段并且开始数字预失真计算。这是通过将功率级的静态电流超过标称值来实现的，以便在施加射频信号并且数字预失真接通时快速预热和重新调整到其正常偏置点。

9. 发明授权

US07755429B2 System and method for dynamic drain voltage adjustment to control linearity, output power, and efficiency in RF power amplifiers 有权
标题翻译：用于动态漏极电压调整的系统和方法，用于控制RF功率放大器的线性度，输出功率和效率
公开(公告)号：US07755429B2
公开(公告)日：2010-07-13
申请号：US12031249
申请日：2008-02-14
申请人： Dung C. Nguyen , Soon Yoon , Ahmad Khanifar , Don C. Devendorf
发明人： Dung C. Nguyen , Soon Yoon , Ahmad Khanifar , Don C. Devendorf
IPC分类号： H03F3/04
CPC分类号： H03F1/0211 , H03F1/0233 , H03F1/0261 , H03F1/0288 , H03F1/301 , H03F1/32 , H03F3/24 , H03F2200/102 , H03F2200/105 , H03F2200/15 , H03F2200/24 , H03F2200/27 , H03F2200/393 , H03F2200/405 , H03F2200/447 , H03F2200/451 , H03F2200/465 , H03F2200/468 , H03F2200/504 , H03F2200/511 , H03F2200/516
摘要： A system and method for dynamic adjustment of drain or collector voltage of a power amplifier (PA), including a PA having a voltage input, a temperature sensor measuring ambient temperature of the PA, and an adaptive PA control processor that dynamically changes the input voltage based on the ambient temperature, achieving a desired peak power when the system is subjected to high temperatures. In a further embodiment, a power sensor measures output power of the PA, and the control processor dynamically changes the voltage based on output power when the system serves a large cell in a mobile communication infrastructure employing high power. In a further embodiment, a multistage PA and method include amplifier stages having drain or collector voltage inputs, wherein a voltage applied to the inputs are set so as to be proportional to the peak power requirements of each stage, enhancing overall efficiency.
摘要翻译：用于动态调整功率放大器（PA）的漏极或集电极电压的系统和方法，包括具有电压输入的PA，测量PA的环境温度的温度传感器以及动态地改变输入电压的自适应PA控制处理器基于环境温度，当系统经受高温时获得期望的峰值功率。在另一实施例中，功率传感器测量PA的输出功率，并且当系统服务于采用高功率的移动通信基础设施中的大小区时，控制处理器基于输出功率来动态地改变电压。在另一实施例中，多级PA和方法包括具有漏极或集电极电压输入的放大器级，其中施加到输入的电压被设置成与每级的峰值功率要求成比例，从而提高整体效率。

10. 发明申请

US20060238245A1 RF amplifier employing active load linearization 有权
标题翻译： RF放大器采用有源负载线性化
公开(公告)号：US20060238245A1
公开(公告)日：2006-10-26
申请号：US11372595
申请日：2006-03-10
申请人： Scott Carichner , Nikolai Maslennikov , Ryan Henry , Ahmad Khanifar
发明人： Scott Carichner , Nikolai Maslennikov , Ryan Henry , Ahmad Khanifar
IPC分类号： H03G3/20
CPC分类号： H03F1/0288 , H03F1/0205 , H03F1/3205 , H03F3/602 , H03F2200/198
摘要： A power amplifier system for high efficiency signal amplification of digitally modulated carrier signal or multi-carrier signals is disclosed. The linearity of the amplifier is improved by providing dynamic load line adjustments through implementation of suitably defined transfer functions employing dynamic control of operational aspects of active devices in the power amplifier.
摘要翻译：公开了一种用于数字调制载波信号或多载波信号的高效率信号放大的功率放大器系统。通过使用对功率放大器中的有源器件的操作方面的动态控制的适当定义的传递函数的实现来提供动态负载线调整来改善放大器的线性。

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