公开(公告)号：US08306150B2

公开(公告)日：2012-11-06

申请号：US12823714

申请日：2010-06-25

申请人： Fernando A. Mujica ,  Carson A. Wick ,  Lei Ding ,  Milind Borkar ,  Roland Sperlich

发明人： Fernando A. Mujica ,  Carson A. Wick ,  Lei Ding ,  Milind Borkar ,  Roland Sperlich

IPC分类号： H04K1/02 ,  H04L25/03 ,  H04L25/49

CPC分类号： H04L27/368 ,  H04L25/0202

摘要： Systems and methods for identifying a transmission channel response and a feedback channel response from a plurality of composite system responses are disclosed. A plurality of shifted feedback signals are created by shifting a feedback signal frequency by a plurality of first offset values and/or by shifting a transmission signal frequency by a plurality of second offset values. The feedback signals are compared to an input signal to identify the transmission channel response and/or a feedback channel response. A control signal is generated for a pre-distortion circuit to modify the input signal by an inverse of the transmission channel response. The composite system response is measured at a plurality of operating frequencies and at the plurality of offset values. The measurements are stored in a matrix and singular value decomposition is applied to the matrix of measurements to calculate the transmission channel response and feedback channel response.

摘要翻译： 公开了用于识别传输信道响应和来自多个复合系统响应的反馈信道响应的系统和方法。 通过将反馈信号频率移位多个第一偏移值和/或通过将发送信号频率移位多个第二偏移值来创建多个移位反馈信号。 将反馈信号与输入信号进行比较，以识别传输信道响应和/或反馈信道响应。 产生用于预失真电路的控制信号，以通过传输信道响应的倒数修改输入信号。 在多个工作频率和多个偏移值处测量复合系统响应。 将测量值存储在矩阵中，并将奇异值分解应用于测量矩阵，以计算传输信道响应和反馈信道响应。

公开(公告)号：US20110317786A1

公开(公告)日：2011-12-29

申请号：US12823714

申请日：2010-06-25

申请人： Fernando A. Mujica ,  Carson A. Wick ,  Lei Ding ,  Milind Borkar ,  Roland Sperlich

发明人： Fernando A. Mujica ,  Carson A. Wick ,  Lei Ding ,  Milind Borkar ,  Roland Sperlich

IPC分类号： H04B15/00 ,  H04B17/00

CPC分类号： H04L27/368 ,  H04L25/0202

摘要： Systems and methods for identifying a transmission channel response and a feedback channel response from a plurality of composite system responses are disclosed. A plurality of shifted feedback signals are created by shifting a feedback signal frequency by a plurality of first offset values and/or by shifting a transmission signal frequency by a plurality of second offset values. The feedback signals are compared to an input signal to identify the transmission channel response and/or a feedback channel response. A control signal is generated for a pre-distortion circuit to modify the input signal by an inverse of the transmission channel response. The composite system response is measured at a plurality of operating frequencies and at the plurality of offset values. The measurements are stored in a matrix and singular value decomposition is applied to the matrix of measurements to calculate the transmission channel response and feedback channel response.

摘要翻译： 公开了用于识别传输信道响应和来自多个复合系统响应的反馈信道响应的系统和方法。 通过将反馈信号频率移位多个第一偏移值和/或通过将发送信号频率移位多个第二偏移值来创建多个移位反馈信号。 将反馈信号与输入信号进行比较，以识别传输信道响应和/或反馈信道响应。 产生用于预失真电路的控制信号，以通过传输信道响应的倒数修改输入信号。 在多个工作频率和多个偏移值处测量复合系统响应。 将测量值存储在矩阵中，并将奇异值分解应用于测量矩阵，以计算传输信道响应和反馈信道响应。

公开(公告)号：US08670501B2

公开(公告)日：2014-03-11

申请号：US12962369

申请日：2010-12-07

申请人： Fernando A. Mujica ,  Lei Ding

发明人： Fernando A. Mujica ,  Lei Ding

IPC分类号： H04K1/02 ,  H04L25/03 ,  H04L25/49

CPC分类号： H04B1/0475 ,  H03F1/3247 ,  H03F3/195 ,  H03F3/24 ,  H03F2200/451 ,  H03F2201/3212

摘要： Embodiments of the invention provide a DPD system where the transmit reference signal is transformed, including sub-sampling, frequency translation, and the like, to match the feedback signal, which goes thru a similar transformation process, to obtain an error signal. The same transformation is applied to a system model, which may be Jacobian, Hessian, Gradient, or the like, in an adaptation algorithm to minimize error.

摘要翻译： 本发明的实施例提供了一种DPD系统，其中发射参考信号被变换，包括子采样，频率转换等，以与通过类似变换过程的反馈信号匹配以获得误差信号。 在适应算法中，将系统模型应用于Jacobian，Hessian，Gradient等系统模型，以使误差最小化。

公开(公告)号：US20110135034A1

公开(公告)日：2011-06-09

申请号：US12962369

申请日：2010-12-07

申请人： Fernando A. Mujica ,  Lei Ding

发明人： Fernando A. Mujica ,  Lei Ding

IPC分类号： H04L25/49

CPC分类号： H04B1/0475 ,  H03F1/3247 ,  H03F3/195 ,  H03F3/24 ,  H03F2200/451 ,  H03F2201/3212

摘要： Embodiments of the invention provide a DPD system where the transmit reference signal is transformed, including sub-sampling, frequency translation, and the like, to match the feedback signal, which goes thru a similar transformation process, to obtain an error signal. The same transformation is applied to a system model, which may be Jacobian, Hessian, Gradient, or the like, in an adaptation algorithm to minimize error.

摘要翻译： 本发明的实施例提供了一种DPD系统，其中发射参考信号被变换，包括子采样，频率转换等，以与通过类似变换过程的反馈信号匹配以获得误差信号。 在适应算法中，将系统模型应用于Jacobian，Hessian，Gradient等系统模型，以使误差最小化。

公开(公告)号：US07221754B2

公开(公告)日：2007-05-22

申请号：US10356787

申请日：2003-02-01

申请人： Fernando A. Mujica

发明人： Fernando A. Mujica

IPC分类号： H04M3/00

CPC分类号： H04B3/23 ,  H04B3/03 ,  H04L12/6418 ,  H04L2012/6478 ,  H04L2012/6491

摘要： A method is provided for accomplishing asymmetric digital subscriber loop classification and the design of passive hybrid networks for each of the classes. The resulting hybrids are suitable for implementation in a switchable hybrid architecture.

摘要翻译： 提供了一种用于完成非对称数字用户环路分类的方法以及针对每个类别的被动混合网络的设计。 所产生的混合动力适用于可切换混合架构中的实现。

公开(公告)号：US06480068B1

公开(公告)日：2002-11-12

申请号：US09966055

申请日：2001-09-28

申请人： Fernando A. Mujica ,  Prakash Easwaran ,  Sandeep Kesrimal Oswal

发明人： Fernando A. Mujica ,  Prakash Easwaran ,  Sandeep Kesrimal Oswal

IPC分类号： H03G310

CPC分类号： H03G3/3042

摘要： The present invention provides a hardware assisted automatic gain control (AGC) for a communication network. A dedicated hardware portion of the AGC, which works in cooperation with software implemented functionality (400), is included to detect saturation conditions in the internal nodes of the analog front end (200) in which a plurality of gain stages (PGA1, PGA2, PGA3) and filter stages (H1, H2, H3) are interleaved with inaccessible intermediate points. The saturation detection logic includes a comparator (21, 22, 23) and flip-flop (27, 28, 29) for each gain stage (PGA1, PGA2, PGA3) and can be integrated directly in the analog front end 200. The dedicated hardware can further be included in a codec of a modem in a digital subscriber line (DSL) system.

摘要翻译： 本发明提供了一种用于通信网络的硬件辅助自动增益控制（AGC）。 包括与软件实现的功能（400）协同工作的AGC的专用硬件部分，以检测模拟前端（200）的内部节点中的饱和状态，其中多个增益级（PGA1，PGA2， PGA3）和滤波器级（H1，H2，H3）与不可访问的中间点交错。 饱和检测逻辑包括用于每个增益级（PGA1，PGA2，PGA3）的比较器（21,22,23）和触发器（27,28,29），并且可以直接集成在模拟前端200中。专用 硬件可以进一步包括在数字用户线（DSL）系统中的调制解调器的编解码器中。

公开(公告)号：US08437424B2

公开(公告)日：2013-05-07

申请号：US12718152

申请日：2010-03-05

申请人： Fernando A. Mujica ,  Hardik P. Gandhi ,  Kun Shi

发明人： Fernando A. Mujica ,  Hardik P. Gandhi ,  Kun Shi

IPC分类号： H04K1/02 ,  H04L25/03 ,  H04L25/49

CPC分类号： H04L25/03343

摘要： Performing digital predistortion (DPD) for widely spaced narrowband signals, such as the signal used in multi-carrier GSM, can be very difficult. Here, a system is provided the performs DPD for widely spaced narrowband signals. In particular, this system uses a polynomial curve for values of a cross-correlation function (above a predetermined threshold) to determine a delay estimate, which allows for a more robust and accurate system.

摘要翻译： 对于广泛间隔的窄带信号（例如在多载波GSM中使用的信号）执行数字预失真（DPD）可能是非常困难的。 这里，提供了一种用于宽间隔窄带信号的DPD的系统。 特别地，该系统使用用于互相关函数（高于预定阈值）的值的多项式曲线来确定延迟估计，其允许更健壮和准确的系统。

公开(公告)号：US20110216851A1

公开(公告)日：2011-09-08

申请号：US12718152

申请日：2010-03-05

申请人： Fernando A. Mujica ,  Hardik P. Gandhi ,  Kun Shi

发明人： Fernando A. Mujica ,  Hardik P. Gandhi ,  Kun Shi

IPC分类号： H04L25/49 ,  H04L25/03

CPC分类号： H04L25/03343

摘要： Performing digital predistortion (DPD) for widely spaced narrowband signals, such as the signal used in multi-carrier GSM, can be very difficult. Here, a system is provided the performs DPD for widely spaced narrowband signals. In particular, this system uses a polynomial curve for values of a cross-correlation function (above a predetermined threshold) to determine a delay estimate, which allows for a more robust and accurate system.

摘要翻译： 对于广泛间隔的窄带信号（例如在多载波GSM中使用的信号）执行数字预失真（DPD）可能是非常困难的。 这里，提供了一种用于宽间隔窄带信号的DPD的系统。 特别地，该系统使用用于互相关函数（高于预定阈值）的值的多项式曲线来确定延迟估计，其允许更健壮和准确的系统。

公开(公告)号：US07916050B1

公开(公告)日：2011-03-29

申请号：US12580032

申请日：2009-10-15

申请人： Fernando A. Mujica ,  Charles K. Sestok ,  Zigang Yang

发明人： Fernando A. Mujica ,  Charles K. Sestok ,  Zigang Yang

IPC分类号： H03M1/06

CPC分类号： H03M1/004 ,  H03M1/1215 ,  H03M1/123

摘要： Previously, when designing receivers for radio frequency (RF) or wireless communications, designers chose between time-interleaved (TI) analog-to-digital converters (ADCs) for intermediate frequency architectures and dual channel ADCs for direct conversion architectures. Here, similarities between TI ADCs and dual channel ADC were recognized, and an ADC that has the capability of operating as a TI ADCs and dual channel ADC is provided. This allows designer to have greatly increased flexibility during the design process which can greatly reduce design costs, while also allowing the manufacturer of the ADC to realize a reduction in its operating costs.

摘要翻译： 以前，当设计用于射频（RF）或无线通信的接收机时，设计人员选择用于中频架构的时间交织（TI）模数转换器（ADC）和用于直接转换架构的双通道ADC。 在这里，TI ADC和双通道ADC之间的相似之处得到了认可，并且提供了具有作为TI ADC和双通道ADC运作能力的ADC。 这允许设计人员在设计过程中大大提高灵活性，从而大大降低设计成本，同时还允许ADC的制造商实现降低运行成本。

公开(公告)号：US06983032B2

公开(公告)日：2006-01-03

申请号：US09941002

申请日：2001-08-28

申请人： Fernando A. Mujica ,  Udayan Dasgupta ,  Sandeep Kesrimal Oswal ,  Murtaza Ali ,  Pradeep Kiran Sarvepalli ,  Prakash Easwaran ,  Diptendra Narayan Basu

发明人： Fernando A. Mujica ,  Udayan Dasgupta ,  Sandeep Kesrimal Oswal ,  Murtaza Ali ,  Pradeep Kiran Sarvepalli ,  Prakash Easwaran ,  Diptendra Narayan Basu

IPC分类号： H03D3/24

CPC分类号： H04L7/0337 ,  H04L27/2657

摘要： The present invention provides an apparatus, system and method for synchronizing a local clock signal with a remote clock signal in a communication network. Phase information is used to calculate a number of “clock jitters” per unit of time needed to synchronize the locally generated clock with the remote clock. Introducing (removing) a given amount of delay at a particular point in the local clock signal results in a positive (negative) jitter in which its minimum value defines the jitter resolution. The jitters are introduced to the local clock signal from a plurality of tapped delay line elements (310) selected by a phase selector (350) in response to a timing correction signal issued by a phase error module (520).

摘要翻译： 本发明提供了一种在本地时钟信号与通信网络中的远程时钟信号同步的装置，系统和方法。 相位信息用于计算在本地生成的时钟与远程时钟同步所需的每单位时间的“时钟抖动”数量。 在本地时钟信号的特定点引入（去除）给定量的延迟会导致正（负）抖动，其中最小值定义抖动分辨率。 响应于由相位误差模块（520）发出的定时校正信号，从由相位选择器（350）选择的多个抽头延迟线元件（310）中将抖动引入本地时钟信号。