-
公开(公告)号：US20110095819A1
公开(公告)日：2011-04-28
申请号：US12817075
申请日：2010-06-16
申请人： Scott R. Velazquez
发明人： Scott R. Velazquez
CPC分类号： H03F1/3247 , H03F1/3258 , H03F3/19
摘要： The present invention provides an advanced adaptive predistortion linearization technique to dramatically reduce nonlinear distortion in power amplifiers over a very wide instantaneous bandwidth (up to 2 GHz) and over a wide range of amplifier types, input frequencies, signal types, amplitudes, temperature, and other environmental and signal conditions. In an embodiment of the invention, the predistortion linearization circuitry comprises (1) a higher-order polynomial model of an amplifier's gain and phase characteristics—higher than a third-order polynomial model; (2) an adaptive calibration technique; and (3) a heuristic calibration technique. The higher-order polynomial model is generated by introducing, for example, a plurality of multi-tone test signals with varying center frequency and spacing into the power amplifier. From the power amplifier's corresponding output, the nonlinearities are modeled by employing a higher-order curve fit to capture the irregularities in the nonlinear transfer function. Different distortion transfer functions can be implemented for different operating conditions. The adaptive calibration technique is based on a feedback analysis technique, which updates the applicable distortion transfer function by analyzing the error signal between the introduced input signal and the output signal in real-time. The heuristic calibration technique implements different distortion transfer functions based on historical operating conditions and optimal configurations of the power amplifier.
摘要翻译： 本发明提供了一种先进的自适应预失真线性化技术，用于在非常宽的瞬时带宽（高达2GHz）以及宽范围的放大器类型，输入频率，信号类型，振幅，温度和 其他环境和信号条件。 在本发明的实施例中，预失真线性化电路包括（1）放大器的增益和相位特性的高阶多项式模型 - 高于三阶多项式模型; （2）自适应校准技术; 和（3）启发式校准技术。 通过将具有变化的中心频率和间隔的多个多音调测试信号引入功率放大器来生成高阶多项式模型。 从功率放大器的相应输出，通过采用更高阶的曲线拟合来捕获非线性传递函数中的不规则性来建模非线性。 不同的工作条件可以实现不同的失真传递功能。 自适应校准技术基于反馈分析技术，其通过分析引入的输入信号和输出信号之间的误差信号来实时更新适用的失真传递函数。 启发式校准技术基于历史操作条件和功率放大器的最佳配置实现不同的失真传递函数。
-
公开(公告)号：US06177893B1
公开(公告)日：2001-01-23
申请号：US09153802
申请日：1998-09-15
IPC分类号： H03M106
CPC分类号： H03M1/121
摘要： In one aspect, the present invention is directed to a converter for converting a signal from a first format to a second format. The converter includes a decomposition section, a converter array operatively coupled to the decomposition section, and a recombination section operatively coupled to the converter array. The decomposition section includes an input to receive the input signal, a splitter to divide the input signal into a plurality of signals, a plurality of signal outputs, each of which provides as an output one of the plurality of signals, and a clock circuit having a plurality of clock outputs for providing sample clocks to the converter array. The converter array includes a plurality of converters each having a signal input to receive one of the plurality of signals, each having a clock input to receive one of the sample clocks and each having an output that provides a converted signal. At least one of the decomposition section and the recombination section includes filters for filtering one of the plurality of signals and the plurality of converted signals. Other aspects of the invention are directed to methods for generating and calibrating analog and digital converters.
摘要翻译： 一方面，本发明涉及一种用于将来自第一格式的信号转换为第二格式的转换器。 转换器包括分解部分，可操作地耦合到分解部分的转换器阵列，以及可操作地耦合到转换器阵列的复合部分。 分解部分包括用于接收输入信号的输入端，将输入信号划分为多个信号的分路器，多个信号输出，每个信号输出提供多个信号中的一个输出信号;以及时钟电路， 多个时钟输出，用于向转换器阵列提供采样时钟。 转换器阵列包括多个转换器，每个转换器具有输入信号以接收多个信号中的一个信号，每个信号具有时钟输入以接收采样时钟之一，并且每个具有提供转换信号的输出。 分解部分和复合部分中的至少一个包括用于对多个信号中的一个信号和多个转换信号进行滤波的滤波器。 本发明的其它方面涉及用于产生和校准模拟和数字转换器的方法。
-
公开(公告)号：US20150032788A1
公开(公告)日：2015-01-29
申请号：US13915484
申请日：2013-06-11
IPC分类号： H03H21/00
CPC分类号： H03H21/0067 , H03H21/0043 , H03M1/1052 , H04B1/001 , H04L25/02 , H04L25/14 , H04L27/0006 , H04L27/0012 , H04L27/265
摘要： The present invention is an improved linearizer that implements more complex transfer functions to provide the necessary linearization performance with a reasonable amount of signal processing resources. Particularly, the linearizer operates on an analog-to-digital converter and comprises a distortion compensator and one or more factored Volterra compensators, which may include a second-order factored Volterra compensator, a third-order factored Volterra compensator, and additional higher-order factored Volterra compensators. Inclusion of factored Volterra distortion compensators improves linearization processing performance while significantly reducing the computational complexity compared to a traditional Volterra-based compensator.
摘要翻译： 本发明是一种改进的线性化器，其实现更复杂的传递函数，以提供具有合理数量的信号处理资源的必要的线性化性能。 特别地，线性化器在模数转换器上操作，并且包括失真补偿器和一个或多个因子Volterra补偿器，其可以包括二阶因子Volterra补偿器，三阶因子Volterra补偿器和附加高阶 沃尔特拉补偿器。 与传统的基于沃尔泰拉的补偿器相比，包含因子Volterra失真补偿器提高了线性化处理性能，同时显着降低了计算复杂度。
-
公开(公告)号：US08085175B2
公开(公告)日：2011-12-27
申请号：US13079293
申请日：2011-04-04
申请人： Scott R. Velazquez
发明人： Scott R. Velazquez
IPC分类号： H03M1/06
CPC分类号： H03F1/3247 , H03F1/3258 , H03F3/19
摘要： The present invention provides an advanced adaptive predistortion linearization technique to dramatically reduce nonlinear distortion in power amplifiers over a very wide instantaneous bandwidth (up to 2 GHz) and over a wide range of amplifier types, input frequencies, signal types, amplitudes, temperature, and other environmental and signal conditions. In an embodiment of the invention, the predistortion linearization circuitry comprises (1) a higher-order polynomial model of an amplifier's gain and phase characteristics—higher than a third-order polynomial model; (2) an adaptive calibration technique; and (3) a heuristic calibration technique. The higher-order polynomial model is generated by introducing, for example, a plurality of multi-tone test signals with varying center frequency and spacing into the power amplifier. From the power amplifier's corresponding output, the nonlinearities are modeled by employing a higher-order curve fit to capture the irregularities in the nonlinear transfer function. Different distortion transfer functions can be implemented for different operating conditions. The adaptive calibration technique is based on a feedback analysis technique, which updates the applicable distortion transfer function by analyzing the error signal between the introduced input signal and the output signal in real-time. The heuristic calibration technique implements different distortion transfer functions based on historical operating conditions and optimal configurations of the power amplifier.
摘要翻译： 本发明提供了一种先进的自适应预失真线性化技术，用于在非常宽的瞬时带宽（高达2GHz）以及宽范围的放大器类型，输入频率，信号类型，振幅，温度和 其他环境和信号条件。 在本发明的实施例中，预失真线性化电路包括（1）放大器的增益和相位特性的高阶多项式模型 - 高于三阶多项式模型; （2）自适应校准技术; 和（3）启发式校准技术。 通过将具有变化的中心频率和间隔的多个多音调测试信号引入功率放大器来生成高阶多项式模型。 从功率放大器的相应输出，通过采用更高阶的曲线拟合来捕获非线性传递函数中的不规则性来建模非线性。 不同的工作条件可以实现不同的失真传递函数。 自适应校准技术基于反馈分析技术，其通过分析引入的输入信号和输出信号之间的误差信号来实时更新适用的失真传递函数。 启发式校准技术基于历史操作条件和功率放大器的最佳配置实现不同的失真传递函数。
-
公开(公告)号：US07782235B1
公开(公告)日：2010-08-24
申请号：US12112380
申请日：2008-04-30
申请人： Scott R. Velazquez
发明人： Scott R. Velazquez
IPC分类号： H03M1/06
CPC分类号： H03M1/1052 , H03M1/1004 , H03M1/1215 , H03M1/164
摘要： In a compensator for compensating mismatches, and in methods for such compensation, the compensator compensates for mismatches in output signals of a system with mismatches during normal operation of the system with mismatches. The compensator comprises: a mismatch estimator that monitors at least two mismatched signals output by the system with mismatches during normal operation and that generates matching parameters indicating an amount of mismatch between the at least two mismatched signals, the mismatch estimator updating the matching parameters during normal operation of the system with mismatches, and a mismatch equalizer that compensates mismatches in the mismatched signals output by the system with mismatches during normal operation of the system with mismatches in response to the matching parameters.
摘要翻译： 在用于补偿不匹配的补偿器中，以及用于补偿的方法中，补偿器补偿系统正常运行期间不匹配时系统输出信号不匹配的错配。 补偿器包括：不匹配估计器，其在正常操作期间监视由系统输出的至少两个不匹配信号，并且产生指示至少两个失配信号之间的失配量的匹配参数，不匹配估计器在正常期间更新匹配参数 不匹配的系统的操作，以及不匹配均衡器，其补偿系统在由于匹配参数的不正确的正常操作期间输出的不匹配的错误信号中的不匹配。
-
公开(公告)号：US06388594B1
公开(公告)日：2002-05-14
申请号：US09680057
申请日：2000-10-04
IPC分类号： H03M110
CPC分类号： H03M1/121
摘要： In one aspect, the present invention is directed to a converter for converting a signal from a first format to a second format. The converter includes a decomposition section, a converter array operatively coupled to the decomposition section, and a recombination section operatively coupled to the converter array. The decomposition section includes an input to receive the input signal, a splitter to divide the input signal into a plurality of signals, a plurality of signal outputs, each of which provides as an output one of the plurality of signals, and a clock circuit having a plurality of clock outputs for providing sample clocks to the converter array. The converter array includes a plurality of converters each having a signal input to receive one of the plurality of signals, each having a clock input to receive one of the sample clocks and each having an output that provides a converted signal. At least one of the decomposition section and the recombination section includes filters for filtering one of the plurality of signals and the plurality of converted signals. Other aspects of the invention are directed to methods for generating and calibrating analog and digital converters.
摘要翻译： 一方面，本发明涉及一种用于将来自第一格式的信号转换为第二格式的转换器。 转换器包括分解部分，可操作地耦合到分解部分的转换器阵列，以及可操作地耦合到转换器阵列的复合部分。 分解部分包括用于接收输入信号的输入端，将输入信号划分为多个信号的分路器，多个信号输出，每个信号输出提供多个信号中的一个输出信号;以及时钟电路， 多个时钟输出，用于向转换器阵列提供采样时钟。 转换器阵列包括多个转换器，每个转换器具有输入信号以接收多个信号中的一个信号，每个信号具有时钟输入以接收采样时钟之一，并且每个具有提供转换信号的输出。 分解部分和复合部分中的至少一个包括用于对多个信号中的一个信号和多个转换信号进行滤波的滤波器。 本发明的其它方面涉及用于产生和校准模拟和数字转换器的方法。
-
公开(公告)号：US06198416B1
公开(公告)日：2001-03-06
申请号：US09548069
申请日：2000-04-12
申请人： Scott R. Velazquez
发明人： Scott R. Velazquez
IPC分类号： H03M106
CPC分类号： H03M1/0614 , H03M1/12
摘要： In one aspect, the present invention is directed to a compensator for compensating linearity errors, such as harmonic distortion and intermodulation distortion, in devices. The compensator includes a means for phase-shifting and a means for exponentiation to generate a compensation signal such that the linearity error distortion signals are canceled in the system output while maintaining the desired fundamental signal. Another aspect of the invention is directed to methods for calibrating the linearity error compensator. Another aspect of the invention is directed to a modeling linearity errors in a device.
摘要翻译： 一方面，本发明涉及用于补偿装置中的线性误差（诸如谐波失真和互调失真）的补偿器。 补偿器包括用于相移的装置和用于求幂的装置以产生补偿信号，使得线性误差失真信号在系统输出中被消除，同时保持期望的基本信号。 本发明的另一方面涉及校准线性误差补偿器的方法。 本发明的另一方面涉及一种设备中的建模线性误差。
-
公开(公告)号：US20140133603A1
公开(公告)日：2014-05-15
申请号：US14044869
申请日：2013-10-02
IPC分类号： H04L25/02
CPC分类号： H04L25/02 , H04B1/001 , H04L25/14 , H04L27/0006 , H04L27/0012
摘要： The present invention provides a high-performance adaptive digital receiver with adaptive background control that optimizes the performance in rapidly changing signal environments and provides 3.6 GHz instantaneous bandwidth, SFDR>90 dB, SNR=66 dB, with dynamic digital channelization. The receiver takes advantage of several levels of adaptivity that conventional approaches do not offer. In addition to a dynamic digital channelizer that is adaptively tuned based on detected signals, the present invention employs a powerful software reconfigurable digitizer that is adaptively optimized for the current signal environment to control important receiver parameters such as bandwidth, dynamic range, resolution, and sensitivity.
摘要翻译： 本发明提供了具有自适应背景控制的高性能自适应数字接收机，其优化了快速变化的信号环境中的性能，并提供了动态数字信道化的3.6GHz瞬时带宽，SFDR> 90dB，SNR = 66dB。 接收机利用传统方法不提供的几个适应性水平。 除了基于检测到的信号自适应地调整的动态数字信道发送器之外，本发明还使用强大的软件可重配置数字转换器，其被自适应地优化用于当前信号环境以控制重要的接收机参数，例如带宽，动态范围，分辨率和灵敏度 。
-
公开(公告)号：US20130016798A1
公开(公告)日：2013-01-17
申请号：US13455071
申请日：2012-04-24
CPC分类号： H04L25/02 , H04B1/001 , H04L25/14 , H04L27/0006 , H04L27/0012
摘要： The present invention provides a high-performance adaptive digital receiver with adaptive background control that optimizes the performance in rapidly changing signal environments and provides 3.6 GH; instantaneous bandwidth, SFDR>90 dB, SNR=66 dB, with dynamic digital channelization. The receiver takes advantage of several levels of adaptivity that conventional approaches do not offer. In addition to a dynamic digital channelizer that is adaptively tuned based on detected signals, the present invention employs a powerful software reconfigurable digitizer that is adaptively optimized for the current signal environment to control important receiver parameters such as bandwidth, dynamic range, resolution, and sensitivity.
摘要翻译： 本发明提供一种具有自适应背景控制的高性能自适应数字接收机，可以在快速变化的信号环境中优化性能并提供3.6GH; 瞬时带宽，SFDR> 90 dB，SNR = 66 dB，具有动态数字信道化。 接收机利用传统方法不提供的几个适应性水平。 除了基于检测到的信号自适应地调整的动态数字信道发送器之外，本发明还使用强大的软件可重配置数字转换器，其被自适应地优化用于当前信号环境以控制重要的接收机参数，例如带宽，动态范围，分辨率和灵敏度 。
-
公开(公告)号：US08164496B2
公开(公告)日：2012-04-24
申请号：US12908783
申请日：2010-10-20
申请人： Scott R. Velazquez
发明人： Scott R. Velazquez
IPC分类号： H03M1/06
CPC分类号： H03F1/3247 , H03F1/3258 , H03F3/19
摘要： In a compensator for compensating mismatches, and in methods for such compensation, the compensator compensates for mismatches in output signals of a system with mismatches during normal operation of the system with mismatches. The compensator comprises: a mismatch estimator that monitors at least two mismatched signals output by the system with mismatches during normal operation and that generates matching parameters indicating an amount of mismatch between the at least two mismatched signals, the mismatch estimator updating the matching parameters during normal operation of the system with mismatches, and a mismatch equalizer that compensates mismatches in the mismatched signals output by the system with mismatches during normal operation of the system with mismatches in response to the matching parameters.
摘要翻译： 在用于补偿不匹配的补偿器中，以及用于补偿的方法中，补偿器补偿系统正常运行期间不匹配时系统输出信号不匹配的错配。 补偿器包括：不匹配估计器，其在正常操作期间监视由系统输出的至少两个不匹配信号，并且产生指示至少两个失配信号之间的失配量的匹配参数，不匹配估计器在正常期间更新匹配参数 不匹配的系统的操作，以及不匹配均衡器，其补偿系统在由于匹配参数的不正确的正常操作期间输出的不匹配的错误信号中的不匹配。
-
-
-
-
-
-
-
-
-
搜索结果
24 条记录 (耗时 0.022 秒)
