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公开(公告)号：US09124324B2
公开(公告)日：2015-09-01
申请号：US14679603
申请日：2015-04-06
Applicant: Texas Instruments Incorporated
Inventor： Hardik Prakash Gandhi , Zigang Yang , Xiaohan Chen , Raul Blazquez , Lars Jorgensen , Hongzhi Zhao , Jie Yang
CPC classification number: H04B1/0475 , H03F1/02 , H03F1/0288 , H03F1/3241 , H03F3/24 , H04B2001/0416 , H04B2001/045 , H04L27/2614
Abstract: A method of predistorting an input signal (902) for an amplifier is disclosed (FIG. 9). The method includes predistorting the input signal with a first set of parameters (FDPD) and a second set of parameters (CDPD) at a first time (904). The first set of parameters is updated at a second time (914). The second set of parameters is updated separately from the first set of parameters at a third time (920).
Abstract translation: 公开了一种用于放大器的输入信号（902）的预失真的方法（图9）。 该方法包括在第一时间（904）用第一组参数（FDPD）和第二组参数（CDPD）预失真输入信号。 第一组参数第二次更新（914）。 第二组参数在第三时间与第一组参数分开更新（920）。
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2.发明申请subtracting linear impairments for non-linear impairment digital pre-distortion error signal 有权减去非线性损伤数字预失真误差信号的线性损伤公开(公告)号：US20150236730A1
公开(公告)日：2015-08-20
申请号：US14185888
申请日：2014-02-20
Applicant: Texas Instruments Incorporated
Inventor： Hongzhi Zhao , Xiaohan Chen , Zigang Yang
IPC: H04B1/04
CPC classification number: H04B1/0475 , H03F1/3241 , H04B2001/0425
Abstract: Example embodiment of the systems and methods of linear impairment modeling to improve digital pre-distortion adaptation performance includes a DPD module that is modified during each sample by a DPD adaptation engine. A linear impairment modeling module separates the linear and non-linear errors introduced in the power amplifier. The linear impairment model is adjusted during each sample using inputs from the input signal and from a FB post processing module. The linear impairment modeling module removes the linear errors such that the DPD adaptation engine only adapts the DPD module based on the non-linear errors. This increases system stability and allows for the correction of IQ imbalance inside the linear impairment modeling, simplifying the feedback post-processing.
Abstract translation: 用于改善数字预失真适应性能的线性损伤建模的系统和方法的示例性实施例包括在DPD适配引擎的每个采样期间修改的DPD模块。 线性损伤建模模块分离功率放大器中引入的线性和非线性误差。 在每个采样中使用输入信号和FB后处理模块的输入调整线性损伤模型。 线性损伤建模模块消除线性误差，使得DPD自适应引擎仅基于非线性误差来适应DPD模块。 这增加了系统稳定性，并允许在线性损伤建模中对IQ不平衡进行校正，从而简化了反馈后处理。
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3.发明授权Transmitter first/second digital predistortion and first/second adaption circuitry with feedback 有权发射机第一/第二数字预失真和具有反馈的第一/第二适配电路公开(公告)号：US09001928B2
公开(公告)日：2015-04-07
申请号：US13852333
申请日：2013-03-28
Applicant: Texas Instruments Incorporated
Inventor： Hardik Prakash Gandhi , Zigang Yang , Xiaohan Chen , Raul Blazquez , Lars Jorgensen , Hongzhi Zhao , Jie Yang
CPC classification number: H04B1/0475 , H03F1/02 , H03F1/0288 , H03F1/3241 , H03F3/24 , H04B2001/0416 , H04B2001/045 , H04L27/2614
Abstract: A method of predistorting an input signal (902) for an amplifier is disclosed (FIG. 9). The method includes predistorting the input signal with a first set of parameters (FDPD) and a second set of parameters (CDPD) at a first time (904). The first set of parameters is updated at a second time (914). The second set of parameters is updated separately from the first set of parameters at a third time (920).
Abstract translation: 公开了一种用于放大器的输入信号（902）的预失真的方法（图9）。 该方法包括在第一时间（904）用第一组参数（FDPD）和第二组参数（CDPD）预失真输入信号。 第一组参数第二次更新（914）。 第二组参数在第三时间与第一组参数分开更新（920）。
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4.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。
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公开(公告)号：US10205617B2
公开(公告)日：2019-02-12
申请号：US13949345
申请日：2013-07-24
Applicant: Texas Instruments Incorporated
Inventor： Lei Ding , Rahmi Hezar , Zigang Yang
IPC: H04L27/26
Abstract: For crest factor reduction in a first signal having first and second components, the first component is delayed. A second signal is generated in response to detecting that a peak in the first component exceeds a predetermined threshold. Amplitude of the peak in the first component is reduced in response to detecting that the peak in the first component exceeds the predetermined threshold. Reducing amplitude of the peak in the first component includes adding the second signal to the delayed first component.
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Patent Agency Ranking
6.发明授权Crest factor reduction for signals with dynamic power and frequency distribution 有权具有动态功率和频率分布的信号的波峰因数降低公开(公告)号：US08971464B2
公开(公告)日：2015-03-03
申请号：US13683019
申请日：2012-11-21
Applicant: Texas Instruments Incorporated
Inventor： Hardik Prakash Gandhi , Zigang Yang , Lars Jorgensen , Prasad Chivakula
CPC classification number: H04B1/0475 , H03F1/3241 , H04B2001/0425 , H04L27/26 , H04L27/2624
Abstract: A method to form a CFR cancellation filter for signals with dynamic power and frequency distribution by estimating the filter at the rate required by the input signal's dynamics. For mixed mode systems (for example CDMA and LTE) the CFR is computed for each stream, and combined to form the final filter.
Abstract translation: 通过以输入信号动态所需的速率估计滤波器，形成具有动态功率和频率分布的信号的CFR消除滤波器的方法。 对于混合模式系统（例如CDMA和LTE），为每个流计算CFR，并组合以形成最终滤波器。
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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
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。
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公开(公告)号：US20150030099A1
公开(公告)日：2015-01-29
申请号：US13949345
申请日：2013-07-24
Applicant: Texas Instruments Incorporated
Inventor： Lei Ding , Rahmi Hezar , Zigang Yang
IPC: H04L27/26
CPC classification number: H04L27/2623
Abstract: For crest factor reduction in a first signal having first and second components, the first component is delayed. A second signal is generated in response to detecting that a peak in the first component exceeds a predetermined threshold. Amplitude of the peak in the first component is reduced in response to detecting that the peak in the first component exceeds the predetermined threshold. Reducing amplitude of the peak in the first component includes adding the second signal to the delayed first component.
Abstract translation: 对于具有第一和第二分量的第一信号中的波峰因数降低，第一分量被延迟。 响应于检测到第一分量中的峰值超过预定阈值，产生第二信号。 响应于检测到第一分量中的峰值超过预定阈值，第一分量中峰值的幅度减小。 降低第一分量中的峰值的幅度包括将第二信号加到延迟的第一分量。
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9.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
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。
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公开(公告)号：US10015028B2
公开(公告)日：2018-07-03
申请号：US14492839
申请日：2014-09-22
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Lars Jorgensen , Zigang Yang , Hardik Prakash Gandhi
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.
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