公开(公告)号：US07804915B2

公开(公告)日：2010-09-28

申请号：US12365241

申请日：2009-02-04

Applicant: Xinping Huang ,  Mario Caron

Inventor： Xinping Huang ,  Mario Caron

IPC: H04K1/02

CPC classification number: H04L27/364

Abstract: The invention relates to methods and circuits for compensating linear in-band distortions such as those occurring in RF circuits of broad band communication systems. A low-rate sampling is used to collect statistical information about a modulated signal after it passed through the distorting circuits, which is then compared to reference statistical information for the modulated signal to iteratively adjust a frequency response of an equalizing linear filter inserted into the signal path so as to compensate for the distortions.

Abstract translation: 本发明涉及用于补偿线性带内失真的方法和电路，例如在宽带通信系统的RF电路中发生的失真。 使用低速率采样在经过失真电路之后收集关于调制信号的统计信息，然后与调制信号的参考统计信息进行比较，以迭代地调整插入到信号中的均衡线性滤波器的频率响应 路径，以补偿失真。

公开(公告)号：US07822147B2

公开(公告)日：2010-10-26

申请号：US11702523

申请日：2007-02-06

Applicant: Xinping Huang ,  Mario Caron

Inventor： Xinping Huang ,  Mario Caron

IPC: H04K1/02

CPC classification number: H04L27/364

Abstract: The invention provides a type-based method to compensate for distortions in circuits operating on a plurality of input modulated signals to form one or more output modulated signals. Steps of the method include low-rate sampling of the output signal to obtain a statistical characteristics thereof, and adjusting parameters of the circuit to introduce a controlled degree of cross-coupling between the signals until the statistical characteristics of the output signal approximates a reference characteristics defined by the used modulation formats. Another aspect of the invention provides a self-calibrating multi-port circuit implementing the method.

Abstract translation: 本发明提供一种基于类型的方法来补偿在多个输入调制信号上工作的电路中的失真，以形成一个或多个输出调制信号。 该方法的步骤包括输出信号的低速采样以获得其统计特性，以及调整电路的参数以在信号之间引入受控程度的交叉耦合，直到输出信号的统计特性近似于参考特征 由所使用的调制格式定义。 本发明的另一方面提供实现该方法的自校准多端口电路。

公开(公告)号：US06337888B1

公开(公告)日：2002-01-08

申请号：US09092945

申请日：1998-06-08

Applicant: Xinping Huang ,  Mario Caron ,  Daniel J. Hindson ,  Michel de Léséleuc

Inventor： Xinping Huang ,  Mario Caron ,  Daniel J. Hindson ,  Michel de Léséleuc

IPC: H03D308

CPC classification number: H03D3/008 ,  G01S7/288 ,  G01S2007/2886 ,  H03D2200/0047 ,  H04B1/30 ,  H04L27/00

Abstract: The present invention relates to the regeneration of in-phase (I) and quadrature (Q) signals in electronic devices commonly used in communication, radar and instrumentation electronics. The original signal of interest comprises two orthogonal components that are mathematically modelled using complex values, which are then decomposed into a real (I) and an imaginary (Q) component. These two components are orthogonal to each other and represent fully the signal of interest. The present method adaptively compensates for the gain and phase imbalances and DC offsets in I and Q signal regeneration. First, 3 phase shifted versions of the received signal, either down-converted to some intermediate frequency (IF) or at baseband, are digitized. Although the optimum phase shift between each version is 360°/3, any phase shift different than 0° and 180° is acceptable and no a priori knowledge of the phase shifts is required. Based on these 3 digital signals representing 3 linear combinations of the I&Q signal components, the regeneration algorithm projects these signals into a 3-dimensional space composed of the I signal subspace, the Q signal subspace, and another subspace, referred to as the noise subspace. The projection is performed using an eigen-decomposition method where the eigenvectors associated with the I and Q signal subspaces provide linear combination coefficients for regenerating the I&Q signals. Compensation for DC offsets is performed by removing an average DC offset on the phase and gain corrected I&Q signals. The regenerated digital I and Q signals are then converted back to analog signals, when required.

Abstract translation: 本发明涉及在通信，雷达和仪表电子设备中通常使用的电子设备中的同相（I）和正交（Q）信号的再生。 感兴趣的原始信号包括使用复数值进行数学建模的两个正交分量，然后将其分解为实数（I）和虚数（Q）分量。 这两个分量彼此正交并充分表示感兴趣的信号。 本方法自适应地补偿I和Q信号再生中的增益和相位不平衡和DC偏移。 首先，将被转换成一些中频（IF）或在基带处的接收信号的3个相移版本被数字化。 虽然每个版本之间的最佳相移是360°/ 3，但是任何相位偏移不同于0°和180°都是可以接受的，并且不需要相移的先验知识。 基于表示I＆Q信号分量的3个线性组合的这3个数字信号，再生算法将这些信号投影到由I信号子空间，Q信号子空间和称为噪声子空间的另一个子空间组成的3维空间中 。 使用特征分解方法执行投影，其中与I和Q信号子空间相关联的特征向量提供用于再生I＆Q信号的线性组合系数。 通过去除相位上的平均DC偏移和增益校正的I＆Q信号来执行DC偏移的补偿。 当需要时，再生的数字I和Q信号然后被转换回模拟信号。

公开(公告)号：US20090141828A1

公开(公告)日：2009-06-04

申请号：US12365241

申请日：2009-02-04

Applicant: Xinping HUANG ,  Mario Caron

Inventor： Xinping HUANG ,  Mario Caron

IPC: H04L25/49

CPC classification number: H04L27/364

Abstract: The invention relates to methods and circuits for compensating linear in-band distortions such as those occurring in RF circuits of broad band communication systems. A low-rate sampling is used to collect statistical information about a modulated signal after it passed through the distorting circuits, which is then compared to reference statistical information for the modulated signal to iteratively adjust a frequency response of an equalizing linear filter inserted into the signal path so as to compensate for the distortions.

Abstract translation: 本发明涉及用于补偿线性带内失真的方法和电路，例如在宽带通信系统的RF电路中发生的失真。 使用低速率采样在经过失真电路之后收集关于调制信号的统计信息，然后与调制信号的参考统计信息进行比较，以迭代地调整插入到信号中的均衡线性滤波器的频率响应 路径，以补偿失真。

公开(公告)号：US08532215B2

公开(公告)日：2013-09-10

申请号：US12880590

申请日：2010-09-13

Applicant: Xinping Huang ,  Zhiwen Zhu ,  Mario Caron

Inventor： Xinping Huang ,  Zhiwen Zhu ,  Mario Caron

IPC: H04B7/02 ,  H04L1/02

CPC classification number: H03F1/3247 ,  H03F2200/39 ,  H03F2201/3206 ,  H03F2201/3233 ,  H04L25/03343

Abstract: The invention relates to a method and circuit for linearizing amplifiers and other nonlinear circuits for multi-carrier signals. An output signal from the amplifier is sampled, and a correlation matrix of size N×N is computed from the sampled signal, wherein N exceeds the number of multiplexed carriers in the signal. A signal-to-distortion ratio (SDR) is then estimated based on a ratio of one or more largest to one or more smallest eigenvalues of the correlation matrix, and the signal into the amplifier is pre-distorted so as to maximize the SDR.

Abstract translation: 本发明涉及用于线性化放大器和用于多载波信号的其它非线性电路的方法和电路。 来自放大器的输出信号被采样，并且从采样信号计算大小为N×N的相关矩阵，其中N超过信号中多路复用载波的数量。 然后基于相关矩阵的一个或多个最大特征值与一个或更多个最小特征值的比率来估计信号失真比（SDR），并且放大器的信号被预失真，从而使SDR最大化。

公开(公告)号：US20110064171A1

公开(公告)日：2011-03-17

申请号：US12880590

申请日：2010-09-13

Applicant: Xinping Huang ,  Zhiwen Zhu ,  Mario Caron

Inventor： Xinping Huang ,  Zhiwen Zhu ,  Mario Caron

IPC: H04B1/10

CPC classification number: H03F1/3247 ,  H03F2200/39 ,  H03F2201/3206 ,  H03F2201/3233 ,  H04L25/03343

Abstract: The invention relates to a method and circuit for linearizing amplifiers and other nonlinear circuits for multi-carrier signals. An output signal from the amplifier is sampled, and a correlation matrix of size N×N is computed from the sampled signal, wherein N exceeds the number of multiplexed carriers in the signal. A signal-to-distortion ratio (SDR) is then estimated based on a ratio of one or more largest to one or more smallest eigenvalues of the correlation matrix, and the signal into the amplifier is pre-distorted so as to maximize the SDR.

Abstract translation: 本发明涉及用于线性化放大器和用于多载波信号的其它非线性电路的方法和电路。 来自放大器的输出信号被采样，并且从采样信号计算大小为N×N的相关矩阵，其中N超过信号中多路复用载波的数量。 然后基于相关矩阵的一个或多个最大特征值与一个或更多个最小特征值的比率来估计信号失真比（SDR），并且放大器的信号被预失真，从而使SDR最大化。

公开(公告)号：US20080143562A1

公开(公告)日：2008-06-19

申请号：US11702523

申请日：2007-02-06

Applicant: Xinping Huang ,  Mario Caron

Inventor： Xinping Huang ,  Mario Caron

IPC: H03M1/06

CPC classification number: H04L27/364

Abstract: The invention provides a type-based method to compensate for distortions in circuits operating on a plurality of input modulated signals to form one or more output modulated signals. Steps of the method include low-rate sampling of the output signal to obtain a statistical characteristics thereof, and adjusting parameters of the circuit to introduce a controlled degree of cross-coupling between the signals until the statistical characteristics of the output signal approximates a reference characteristics defined by the used modulation formats. Another aspect of the invention provides a self-calibrating multi-port circuit implementing said method.

Abstract translation: 本发明提供一种基于类型的方法来补偿在多个输入调制信号上工作的电路中的失真，以形成一个或多个输出调制信号。 该方法的步骤包括输出信号的低速采样以获得其统计特性，以及调整电路的参数以在信号之间引入受控程度的交叉耦合，直到输出信号的统计特性近似于参考特征 由所使用的调制格式定义。 本发明的另一方面提供一种实现所述方法的自校准多端口电路。

公开(公告)号：US06885241B2

公开(公告)日：2005-04-26

申请号：US10396391

申请日：2003-03-26

Applicant: Xinping Huang ,  Mario Caron

Inventor： Xinping Huang ,  Mario Caron

IPC: H03F1/32 ,  H04L27/36 ,  H03F1/26

CPC classification number: H04L27/368 ,  H03F1/3247 ,  H03F1/3294 ,  H03F2200/102

Abstract: This invention is about a novel estimation technique for generating a predistortion function to compensate for the AM-AM and AM-PM non-linear conversion distortions of non-linear power amplifiers or non-linear circuits. Based on the cumulative type of power amplifier output envelope, a non-parametric baseband predistortion function is derived. The non-parametric approach avoids any model mismatch. In addition, the technique does not need to demodulate the input signal. Furthermore, it minimizes the effect of the power amplifier non-linearity and significantly improves the system performance

Abstract translation: 本发明涉及一种用于产生预失真函数以补偿非线性功率放大器或非线性电路的AM-AM和AM-PM非线性转换失真的新型估计技术。 基于功率放大器输出包络的累积类型，推导出非参数的基带预失真函数。 非参数方法避免了任何模型不匹配。 另外，该技术不需要解调输入信号。 此外，它使功率放大器的非线性效应最小化，并显着提高了系统性能

公开(公告)号：US06771709B2

公开(公告)日：2004-08-03

申请号：US10268691

申请日：2002-10-11

Applicant: Xinping Huang ,  Mario Caron

Inventor： Xinping Huang ,  Mario Caron

IPC: H04L2503

CPC classification number: H04L27/368

Abstract: A method for self-calibrating a vector modulator is disclosed, including the step of pre-distortion coefficients in dependence upon an in-phase signal, a quadrature signal, and an output envelope of an RF signal, and further comprising the steps of transforming a value representative of an output envelope represented in a nonlinear domain into a value representative of the output envelope represented in a linear domain, determining a parameter vector x as a solution of a linear equation within the linear domain, and determining the pre-distortion coefficients from the parameter vector x. Further described is a compensating quadrature modulator for self-calibrating a vector modulation process, the compensating quadrature modulator comprising an I-signal transmit chain for pre-distorting and transmitting an in-phase signal, a Q-signal transmit chain for pre-distorting and transmitting a quadrature signal, as well as a digital signal processor coupled to the I- and Q-signal transmit chains, and providing pre-distortion coefficients.

Abstract translation: 公开了一种用于自校准矢量调制器的方法，包括根据RF信号的同相信号，正交信号和输出包络的预失真系数的步骤，还包括以下步骤： 表示在非线性域中表示的输出包络的值表示在线性域中表示的输出包络的值，将参数向量x确定为线性域内的线性方程的解，并且从 参数矢量x。 还描述了用于自校准矢量调制过程的补偿正交调制器，该补偿正交调制器包括用于预失真和发送同相信号的I信号发射链，用于预失真的Q信号发射链， 发送正交信号，以及耦合到I和Q信号发射链的数字信号处理器，并提供预失真系数。