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    Power-indexed look-up table design of digital pre-distortion for power amplifiers with dynamic nonlinearities
    3.
    发明授权
    Power-indexed look-up table design of digital pre-distortion for power amplifiers with dynamic nonlinearities 有权
    具有动态非线性功率放大器的数字预失真功率索引查找表设计

    公开(公告)号：US08891675B2

    公开(公告)日：2014-11-18

    申请号：US13644942

    申请日：2012-10-04

    Applicant: Texas Instruments Incorporated

    Inventor： Jie Yang ,  Zigang Yang ,  Hardik Prakash Gandhi ,  Lars Jorgensen

    IPC: H04K1/02 ,  H04L25/03 ,  H04L25/49 ,  H03F3/24 ,  H03F3/189 ,  H04B17/00 ,  H04W52/22 ,  H03F1/32 ,  H04B1/04

    CPC classification number: H04B17/001 ,  H03F1/3241 ,  H03F1/3247 ,  H03F1/3258 ,  H03F1/3294 ,  H03F3/189 ,  H03F3/245 ,  H03F2200/78 ,  H04B17/13 ,  H04B2001/0425 ,  H04L25/03343 ,  H04W52/226

    Abstract: This invention is a method of power amplifier digital pre-distortion which measures a current power level of the power amplifier, stores in a look up table entries consisting of a power level and a corresponding set of digital pre-distortion coefficients, selects a set of digital pre-distortion coefficients corresponding to the measured power level. If the measured current power level is near a power level index, the digital pre-distortion coefficients correspond to the power level index. If the measured current power level is greater than the maximum power level entry, the digital pre-distortion coefficients is of the maximum power level entry. If the measured current power level is less than the minimum power level entry, the digital pre-distortion is of the minimum power level entry. If the measured current power level is not near a power level index, the digital pre-distortion coefficients are an interpolation.

    Abstract translation: 本发明是功率放大器数字预失真的方法，其测量功率放大器的当前功率电平，存储在由功率电平和相应的数字预失真系数集合组成的查找表条目中，选择一组 对应于测量的功率电平的数字预失真系数。 如果测量的当前功率电平接近功率电平指数，则数字预失真系数对应于功率电平指数。 如果测量的当前功率电平大于最大功率电平输入，则数字预失真系数是最大功率电平输入。 如果测量的当前功率电平小于最小功率电平输入，则数字预失真是最小功率电平输入。 如果测量的当前功率电平不接近功率电平指数，则数字预失真系数是内插。

    SYSTEM AND METHOD FOR CONTROLLING PEAK TO AVERAGE POWER RATIO
    4.
    发明申请
    SYSTEM AND METHOD FOR CONTROLLING PEAK TO AVERAGE POWER RATIO 有权
    用于控制峰值以平均功率比的系统和方法

    公开(公告)号：US20150085748A1

    公开(公告)日：2015-03-26

    申请号：US14492839

    申请日：2014-09-22

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Lars Jorgensen ,  Zigang Yang ,  Hardik Prakash Gandhi

    IPC: H04W52/24 ,  H04L27/08 ,  H04L1/00

    CPC classification number: H04L27/08 ,  H03F1/3241 ,  H03F3/245 ,  H03F2200/435 ,  H04L1/0041 ,  H04L1/0045 ,  H04L27/3411 ,  H04W52/04 ,  H04W52/52

    Abstract: A system and method for reducing peak to average power ratio in a wireless communication system. A wireless communication system includes a radio frequency wireless transmitter that includes signal peak reduction circuitry configured to reduce peak to average power ratio of a signal to be transmitted by reducing amplitude of the signal to be transmitted that is greater than a predetermined amplitude. The signal peak reduction circuitry includes a bit inverter configured to invert a bit of a symbol identified as causing the amplitude of the signal to exceed the predetermined amplitude. The bit inverter is also configured to select the bit to invert such that inversion of the bit reduces the amplitude of the signal, and such that forward error correction in a receiver wirelessly coupled to the transmitter restores the bit to a pre-inversion value.

    Abstract translation: 一种用于在无线通信系统中降低峰均功率比的系统和方法。 无线通信系统包括射频无线发射机，其包括信号峰值降低电路，该信号峰值降低电路经配置以通过减小待发射的信号的幅度大于预定幅度来降低要发射的信号的峰均功率比。 信号峰值降低电路包括位反相器，其被配置为反转被识别为导致信号的幅度超过预定幅度的符号的位。 位反相器还被配置为选择该位以反转，使得该位的反相减小信号的幅度，并且使得无线耦合到发射机的接收机中的前向纠错将该位恢复为预反转值。

    Power-Indexed Look-Up Table Design of Digital Pre-Distortion for Power Amplifiers with Dynamic Nonlinearities
    5.
    发明申请
    Power-Indexed Look-Up Table Design of Digital Pre-Distortion for Power Amplifiers with Dynamic Nonlinearities 有权
    具有动态非线性功率放大器的数字预失真的功率索引查找表设计

    公开(公告)号：US20130083834A1

    公开(公告)日：2013-04-04

    申请号：US13644942

    申请日：2012-10-04

    Applicant: Texas Instruments Incorporated

    Inventor： Jie Yang ,  Zigang Yang ,  Hardik Prakash Gandhi ,  Lars Jorgensen

    IPC: H04B15/00 ,  H04B17/00

    CPC classification number: H04B17/001 ,  H03F1/3241 ,  H03F1/3247 ,  H03F1/3258 ,  H03F1/3294 ,  H03F3/189 ,  H03F3/245 ,  H03F2200/78 ,  H04B17/13 ,  H04B2001/0425 ,  H04L25/03343 ,  H04W52/226

    Abstract: This invention is a method of power amplifier digital pre-distortion which measures a current power level of the power amplifier, stores in a look up table entries consisting of a power level and a corresponding set of digital pre-distortion coefficients, selects a set of digital pre-distortion coefficients corresponding to the measured power level. If the measured current power level is near a power level index, the digital pre-distortion coefficients correspond to the power level index. If the measured current power level is greater than the maximum power level entry, the digital pre-distortion coefficients is of the maximum power level entry. If the measured current power level is less than the minimum power level entry, the digital pre-distortion is of the minimum power level entry. If the measured current power level is not near a power level index, the digital pre-distortion coefficients are an interpolation.

    Abstract translation: 本发明是功率放大器数字预失真的方法，其测量功率放大器的当前功率电平，存储在由功率电平和相应的数字预失真系数集合组成的查找表条目中，选择一组 对应于测量的功率电平的数字预失真系数。 如果测量的当前功率电平接近功率电平指数，则数字预失真系数对应于功率电平指数。 如果测量的当前功率电平大于最大功率电平输入，则数字预失真系数是最大功率电平输入。 如果测量的当前功率电平小于最小功率电平输入，则数字预失真是最小功率电平输入。 如果测量的当前功率电平不接近功率电平指数，则数字预失真系数是内插。

    Hexagonal constellations and decoding same in digital communication systems
    7.
    发明授权
    Hexagonal constellations and decoding same in digital communication systems 有权
    数字通信系统中的六角星座和解码相同

    公开(公告)号：US09059881B2

    公开(公告)日：2015-06-16

    申请号：US14051194

    申请日：2013-10-10

    Applicant: Texas Instruments Incorporated

    Inventor： Mohamed Farouk Mansour ,  Lars Jorgensen

    IPC: H04L27/30 ,  H04L25/06 ,  H04L27/34 ,  H04L27/38

    CPC classification number: H04L25/067 ,  H04L27/3411 ,  H04L27/38

    Abstract: Embodiments of the invention provide a method of decoding of hexagonal constellations. The decoding methods exploit the inherent structure of the hexagonal grid to eliminate/minimize the requirements for distance computations. A constellation which has unused constellation points is received. A plurality of lookup tables is used for indicating whether a particular constellation point is used. The lookup tables are indexed using the two integers u and v. An initial estimate ū and v is found. The Euclidean distance to the immediate neighbors resulting in the immediate upper and lower integers for ū and v is computed. From the distance to the nearest neighbor, the log-likelihood ratio value is computed.

    Abstract translation: 本发明的实施例提供了一种对六角形星座进行解码的方法。 解码方法利用六角网格的固有结构来消除/最小化距离计算的要求。 接收到具有未使用的星座点的星座。 多个查找表用于指示是否使用特定的星座点。 查找表使用两个整数u和v进行索引，找到初始估计ū和v。 计算与直接邻居的欧几里德距离，导致ū和v的立即上下整数。 从距离到最近的邻居，计算对数似然比值。

    Capture selection for digital pre-distortion adaptation and capture concatenation for frequency hopping pre-distortion adaptation
    9.
    发明授权
    Capture selection for digital pre-distortion adaptation and capture concatenation for frequency hopping pre-distortion adaptation 有权
    捕获选择数字预失真适应和捕获级联跳频预失真适应

    公开(公告)号：US09374112B2

    公开(公告)日：2016-06-21

    申请号：US14475552

    申请日：2014-09-02

    Applicant: Texas Instruments Incorporated

    Inventor： Zigang Yang ,  Raul Blazquez ,  Hardik Prakash Gandhi ,  Xiaohan Chen ,  Lars Jorgensen

    IPC: H04L25/49 ,  H04B1/04 ,  H04W88/08

    CPC classification number: H04B1/0475 ,  H03F1/3241 ,  H04B2001/0425 ,  H04W88/08

    Abstract: A digital pre-distortion component includes: a first capturing component that captures a first sample set of data; a first generating component that generates a first change matrix associated with a portion of the first sample set of data; a first memory component that stores the first change matrix; a second capturing component that captures a second sample set of data; a second generating component that generates a second change matrix associated with a portion of the second sample set of data; a second memory component that stores the second change matrix; a third capturing component that captures a third sample set of data; a third generating component that generates a third change matrix associated with a portion of the third sample set of data; a comparing component that compares the third change matrix with the first change matrix to obtain a first comparison, and compares the third change matrix with the second change matrix to obtain a second comparison; and an adapting component that adapts the digital pre-distortion component with the third sample set of data based on one of the first comparison and the second comparison.

    Abstract translation: 数字预失真部件包括：第一捕获部件，其捕获第一采样数据集; 第一生成组件，其生成与所述第一样本数据集合的一部分相关联的第一改变矩阵; 存储所述第一改变矩阵的第一存储器组件; 捕获第二样本数据集合的第二捕获组件; 第二生成组件，其生成与所述第二样本数据集合的一部分相关联的第二改变矩阵; 存储所述第二改变矩阵的第二存储器组件; 捕获第三样本数据集合的第三捕获组件; 第三生成组件，其生成与所述第三样本数据集的一部分相关联的第三变化矩阵; 将所述第三变化矩阵与所述第一变化矩阵进行比较以获得第一比较的比较部，将所述第三变化矩阵与所述第二变化矩阵进行比较，得到第二比较; 以及适配部件，其基于第一比较和第二比较中的一个来适配数字预失真分量与第三样本数据集合。

    CAPTURE SELECTION FOR DIGITAL PRE-DISTORTION ADAPTATION AND CAPTURE CONCATENATION FOR FREQUENCY HOPPING PRE-DISTORTION ADAPTATION
    10.
    发明申请
    CAPTURE SELECTION FOR DIGITAL PRE-DISTORTION ADAPTATION AND CAPTURE CONCATENATION FOR FREQUENCY HOPPING PRE-DISTORTION ADAPTATION 有权
    用于频率预失真适应的数字预失真适应和捕获定位的捕获选择

    公开(公告)号：US20160065249A1

    公开(公告)日：2016-03-03

    申请号：US14475552

    申请日：2014-09-02

    Applicant: Texas Instruments Incorporated

    Inventor： Zigang Yang ,  Raul Blazquez ,  Hardik Prakash Gandhi ,  Xiaohan Chen ,  Lars Jorgensen

    IPC: H04B1/04

    CPC classification number: H04B1/0475 ,  H03F1/3241 ,  H04B2001/0425 ,  H04W88/08

    Abstract: A digital pre-distortion component includes: a first capturing component that captures a first sample set of data; a first generating component that generates a first change matrix associated with a portion of the first sample set of data; a first memory component that stores the first change matrix; a second capturing component that captures a second sample set of data; a second generating component that generates a second change matrix associated with a portion of the second sample set of data; a second memory component that stores the second change matrix; a third capturing component that captures a third sample set of data; a third generating component that generates a third change matrix associated with a portion of the third sample set of data; a comparing component that compares the third change matrix with the first change matrix to obtain a first comparison, and compares the third change matrix with the second change matrix to obtain a second comparison; and an adapting component that adapts the digital pre-distortion component with the third sample set of data based on one of the first comparison and the second comparison.

    Abstract translation: 数字预失真部件包括：第一捕获部件，其捕获第一采样数据集; 第一生成组件，其生成与所述第一样本数据集合的一部分相关联的第一改变矩阵; 存储所述第一改变矩阵的第一存储器组件; 捕获第二样本数据集合的第二捕获组件; 第二生成组件，其生成与所述第二样本数据集合的一部分相关联的第二改变矩阵; 存储所述第二改变矩阵的第二存储器组件; 捕获第三样本数据集合的第三捕获组件; 第三生成组件，其生成与所述第三样本数据集的一部分相关联的第三变化矩阵; 将所述第三变化矩阵与所述第一变化矩阵进行比较以获得第一比较的比较部，将所述第三变化矩阵与所述第二变化矩阵进行比较，得到第二比较; 以及适配部件，其基于第一比较和第二比较中的一个来适配数字预失真分量与第三样本数据集合。

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