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1. 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。

2. 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。

3. 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。

4. 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。

5. 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。

6. 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。

7. 发明授权

US07809081B2 Digital pre-distortion technique using nonlinear filters 有权
标题翻译：使用非线性滤波器的数字预失真技术
公开(公告)号：US07809081B2
公开(公告)日：2010-10-05
申请号：US12574796
申请日：2009-10-07
申请人： Khiem V. Cai , David B. Rutan , Matthew S. Gorder , Don C. Devendorf
发明人： Khiem V. Cai , David B. Rutan , Matthew S. Gorder , Don C. Devendorf
IPC分类号： H04K1/02
CPC分类号： H04L25/03885 , H03F1/3247 , H03F1/3276 , H04L25/49 , H04L27/2626 , H04L27/368
摘要： A method and computer program product for operating a linearizer for a circuit, including generating a set of coefficients via a characterizer; predistorting a signal input to the circuit responsive to the coefficients and generating a linearized output in response thereto; filtering the signal through a linear digital filter having linear digital filter taps, each tap other than a first tap being successively delayed by one delay unit; generating powers of the signal; inputting the generated powers of the signal through tapped delay lines, each line having nonlinear digital filter taps, each tap other than a first tap being successively delayed by one delay unit; applying the coefficients to the linear and nonlinear digital filter taps; summing each of the nonlinear digital filter taps corresponding to a certain number of delay units; and adding the sum of each of the delay units to a particular linear digital filter tap.
摘要翻译：一种用于操作电路的线性化器的方法和计算机程序产品，包括经由表征器生成一组系数; 响应于系数预失真输入到电路的信号并响应于此产生线性化的输出; 通过具有线性数字滤波器抽头的线性数字滤波器对信号进行滤波，除了连续延迟一个延迟单元的第一抽头以外的每个抽头; 产生信号的功率; 通过抽头延迟线输入信号的发生功率，每行具有非线性数字滤波器抽头，每个抽头不同于连续延迟一个延迟单元的第一抽头; 将系数应用于线性和非线性数字滤波器抽头; 对与一定数量的延迟单元相对应的每个非线性数字滤波器抽头相加; 并将每个延迟单元的和加到特定的线性数字滤波器抽头上。

8. 发明申请

US20100020900A1 DIGITAL PRE-DISTORTION TECHNIQUE USING NONLINEAR FILTERS 有权
标题翻译：使用非线性滤波器的数字预失真技术
公开(公告)号：US20100020900A1
公开(公告)日：2010-01-28
申请号：US12574796
申请日：2009-10-07
申请人： Khiem V. Cai , David B. Rutan , Matthew S. Gorder , Don C. Devendorf
发明人： Khiem V. Cai , David B. Rutan , Matthew S. Gorder , Don C. Devendorf
IPC分类号： H04L25/49
CPC分类号： H04L25/03885 , H03F1/3247 , H03F1/3276 , H04L25/49 , H04L27/2626 , H04L27/368
摘要： A method and computer program product for operating a linearizer for a circuit, including generating a set of coefficients via a characterizer; predistorting a signal input to the circuit responsive to the coefficients and generating a linearized output in response thereto; filtering the signal through a linear digital filter having linear digital filter taps, each tap other than a first tap being successively delayed by one delay unit; generating powers of the signal; inputting the generated powers of the signal through tapped delay lines, each line having nonlinear digital filter taps, each tap other than a first tap being successively delayed by one delay unit; applying the coefficients to the linear and nonlinear digital filter taps; summing each of the nonlinear digital filter taps corresponding to a certain number of delay units; and adding the sum of each of the delay units to a particular linear digital filter tap.
摘要翻译：一种用于操作电路的线性化器的方法和计算机程序产品，包括经由表征器生成一组系数; 响应于系数预失真输入到电路的信号并响应于此产生线性化的输出; 通过具有线性数字滤波器抽头的线性数字滤波器对信号进行滤波，除了连续延迟一个延迟单元的第一抽头以外的每个抽头; 产生信号的功率; 通过抽头延迟线输入信号的发生功率，每行具有非线性数字滤波器抽头，每个抽头不同于连续延迟一个延迟单元的第一抽头; 将系数应用于线性和非线性数字滤波器抽头; 对与一定数量的延迟单元相对应的每个非线性数字滤波器抽头相加; 并将每个延迟单元的和加到特定的线性数字滤波器抽头上。

9. 发明授权

US07606324B2 Digital pre-distortion technique using non-linear filters 有权
标题翻译：使用非线性滤波器的数字预失真技术
公开(公告)号：US07606324B2
公开(公告)日：2009-10-20
申请号：US11951238
申请日：2007-12-05
申请人： Khiem V. Cai , David B. Rutan , Matthew S. Gorder , Don C. Devendorf
发明人： Khiem V. Cai , David B. Rutan , Matthew S. Gorder , Don C. Devendorf
IPC分类号： H04K1/02
CPC分类号： H04L25/03885 , H03F1/3247 , H03F1/3276 , H04L25/49 , H04L27/2626 , H04L27/368
摘要： A system, method and computer program product for stabilizing a coefficient set used by a digital predistortion (DPD) engine to apply pre-distortion to a transmit signal and cancel distortion generated by a distorting element or distorting system when transmitting the transmit signal, including obtaining an initial coefficient set; rotating the initial coefficient set to maintain a phase of fundamental components (w10(t), . . . , w1Q(t)) of the initial coefficient set a constant value; averaging the rotated coefficient set to obtain an averaged coefficient set; and applying the averaged coefficient set to the DPD engine.
摘要翻译：一种系统，方法和计算机程序产品，用于稳定数字预失真（DPD）引擎使用的系数组，以将预失真应用于发射信号，并且在传输发射信号时消除由失真元件或失真系统产生的失真，包括获得初始系数集; 旋转初始系数集合以保持初始系数的基本分量（w10（t），...，w1Q（t））的相位设定为一个恒定值; 平均旋转系数集合以获得平均系数集合; 并将平均系数集合应用于DPD引擎。

10. 发明授权

US07848451B2 Digital pre-distortion technique using nonlinear filters 有权
标题翻译：使用非线性滤波器的数字预失真技术
公开(公告)号：US07848451B2
公开(公告)日：2010-12-07
申请号：US12580618
申请日：2009-10-16
申请人： Khiem V. Cai , David B. Rutan , Matthew S. Gorder , Don C. Devendorf
发明人： Khiem V. Cai , David B. Rutan , Matthew S. Gorder , Don C. Devendorf
IPC分类号： H04K1/02
CPC分类号： H04L25/03885 , H03F1/3247 , H03F1/3276 , H04L25/49 , H04L27/2626 , H04L27/368
摘要： A system and method for stabilizing a coefficient set used by a digital predistortion (DPD) engine to apply pre-distortion to a transmit signal and cancel distortion generated by a distorting element or distorting system when transmitting the transmit signal, including obtaining an initial coefficient set; rotating the initial coefficient set to maintain a phase of fundamental components (w10(t), . . . , w1Q(t)) of the initial coefficient set as a constant value; averaging in the time domain the rotated coefficient set to obtain an averaged coefficient set; applying the averaged coefficient set to the DPD engine, the initial coefficient set expressed in a first equation [27]; computing the phase of the fundamental components of the initial coefficient set with a second equation [28]; and computing the rotated coefficient set with a third equation [29].
摘要翻译：一种用于稳定由数字预失真（DPD）引擎使用的系数集的系统和方法，用于在传输所述发射信号时将预失真应用于发射信号并消除由失真元件或失真系统产生的失真，包括获得初始系数组 ; 旋转初始系数集合以保持初始系数的基本分量（w10（t），...，w1Q（t））的相位为一个常数值; 在时域中平均旋转系数，以获得平均系数集; 将平均系数集合应用于DPD引擎，以第一等式[27]表示的初始系数集; 用第二个等式计算初始系数集的基本分量的相位[28]; 并用第三个方程计算旋转的系数集[29]。

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