公开(公告)号：US20100119008A1

公开(公告)日：2010-05-13

申请号：US12268940

申请日：2008-11-11

申请人： Debajyoti Pal

发明人： Debajyoti Pal

IPC分类号： H04L25/49 ,  H04L27/00

CPC分类号： H04B1/0039 ,  H04B1/0092 ,  H04B1/30

摘要： A receiver uses a wideband intermediate frequency (IF) in the analog domain and performs low IF down-conversion in the digital domain, using low-power, high-speed, high resolution analog-to-digital converters. The receiver can be integrated into an integrated circuit as one of several receivers. Such an integrated circuit may include multiple transmitters using adaptive non-linear modeling pre-distortion. The non-linear modeling may include memory. Imbalance in intermediate frequency in-phase and quadrature signals may be corrected in the digital domains. DC offsets in the intermediate signal may be corrected in both analog and digital domains. In one instance, the receiver provides a feedback receiver for the adaptive pre-distorter in a transmitter on the integrated circuit.

公开(公告)号：US08755394B2

公开(公告)日：2014-06-17

申请号：US13102623

申请日：2011-05-06

申请人： Pramod Balkrishna Kaluskar ,  Debajyoti Pal

发明人： Pramod Balkrishna Kaluskar ,  Debajyoti Pal

IPC分类号： H04L12/28

CPC分类号： H04L12/2818 ,  H04L12/2825 ,  H04L12/2834 ,  H04L47/10 ,  H04L63/0272 ,  H04N21/4131 ,  H04N21/43615 ,  H04N21/6125 ,  H04N21/8545

摘要： Disclosed are various embodiments for a gateway device that can execute applications which can communicate with various devices in one or more home networks as well as one or more wide area networks. The gateway device can possess capabilities to communicate over various types of proprietary and/or standardized networks. Additionally, the gateway device can be equipped with the ability to communicate with home devices that are directly coupled to the gateway device. The gateway device can also include a mass storage component that allows storage of data on behalf of applications executed therein.

摘要翻译： 公开了可以执行可以与一个或多个家庭网络以及一个或多个广域网中的各种设备进行通信的应用的网关设备的各种实施例。 网关设备可以具有通过各种类型的专有和/或标准化网络进行通信的能力。 此外，网关设备可以配备与直接耦合到网关设备的家庭设备进行通信的能力。 网关设备还可以包括大容量存储组件，其允许代表其中执行的应用来存储数据。

公开(公告)号：US20100119009A1

公开(公告)日：2010-05-13

申请号：US12268975

申请日：2008-11-11

申请人： Debajyoti Pal

发明人： Debajyoti Pal

IPC分类号： H04L25/06 ,  H04L27/00 ,  H04B1/10

CPC分类号： H04B1/0039 ,  H04B1/0092 ,  H04B1/30

摘要： A receiver uses a wideband intermediate frequency (IF) in the analog domain and performs low IF down-conversion in the digital domain, using low-power, high-speed, high resolution analog-to-digital converters. The receiver can be integrated into an integrated circuit as one of several receivers. Such an integrated circuit may include multiple transmitters using adaptive non-linear modeling pre-distortion. The non-linear modeling may include memory. Imbalance in intermediate frequency in-phase and quadrature signals may be corrected in the digital domains. DC offsets in the intermediate signal may be corrected in both analog and digital domains. In one instance, the receiver provides a feedback receiver for the adaptive pre-distorter in a transmitter on the integrated circuit.

公开(公告)号：US06813311B1

公开(公告)日：2004-11-02

申请号：US09525452

申请日：2000-03-14

申请人： Debajyoti Pal ,  Chung-Li Lu ,  Sujai Chari

发明人： Debajyoti Pal ,  Chung-Li Lu ,  Sujai Chari

IPC分类号： H04B138

CPC分类号： H04B3/23

摘要： The present invention, generally speaking, provides for cancellation of non-linear distortions within the echo path of a communications system by characterizing the nonlinearity, performing digital processing of a data signal to cause substantially the same nonlinearity to be applied to the data signal, and inputting a resulting data signal to a non-linear echo-cancellation path. In an exemplary embodiment, the non-linear echo-cancellation path includes as a nonlinear echo canceller a transversal filter or the like. A separate linear echo cancellation path is also provided. Training of the nonlinear echo canceller follows training of the linear echo canceller. This technique is particularly applicable to cancelling the effects of DAC nonlinearity, which can be readily characterized. Using this technique, cancellation improvement of about 3dB can readily be obtained. Alternatively, instead of achieving a lower residual echo floor, the linearity requirements for the transmit DAC can be relaxed. A lower number of bits of precision allows for lower DAC power consumption. The technique is particularly applicable to DSL applications.

摘要翻译： 本发明一般来说通过表征非线性来提供消除通信系统的回波路径内的非线性失真，执行数据信号的数字处理以使得基本上相同的非线性被应用于数据信号，以及 将得到的数据信号输入到非线性回波消除路径。 在示例性实施例中，非线性回波消除路径包括作为非线性回波消除器的横向滤波器等。 还提供了单独的线性回波消除路径。 非线性回波消除器的训练遵循线性回波消除器的训练。 该技术特别适用于消除DAC非线性的影响，可以很容易地表征。 使用这种技术，可以容易地获得约3dB的消除改善。 或者，代替实现较低的残余回波层，可以放宽发射DAC的线性要求。 较低数位的精度允许较低的DAC功耗。 该技术特别适用于DSL应用。

公开(公告)号：US06353629B1

公开(公告)日：2002-03-05

申请号：US09066272

申请日：1998-04-24

申请人： Debajyoti Pal

发明人： Debajyoti Pal

IPC分类号： H04L516

CPC分类号： H04L25/03133 ,  H04L2025/03414 ,  H04L2025/03477

摘要： Improved techniques for time domain equalization are disclosed. The improved techniques include (i) improved time domain equalization techniques referred to as poly-path time domain equalization techniques; (ii) improved training methods for training transmitters and/or receivers of a data transmission system; and (iii) techniques for providing time domain equalization to a transmitter side of a data transmission system. These techniques are particularly suitable for time domain equalization in multicarrier modulation systems where channel shortening provided by time domain equalization is particularly needed.

摘要翻译： 公开了改进的时域均衡技术。 改进的技术包括（i）被称为多路径时域均衡技术的改进的时域均衡技术; （ii）改进用于训练数据传输系统的发射机和/或接收机的训练方法; 和（iii）向数据传输系统的发射机侧提供时域均衡的技术。 这些技术特别适用于多载波调制系统中的时域均衡，其中特别需要通过时域均衡提供的信道缩短。

公开(公告)号：US5542101A

公开(公告)日：1996-07-30

申请号：US154773

申请日：1993-11-19

申请人： Debajyoti Pal

发明人： Debajyoti Pal

IPC分类号： H01Q3/24 ,  H01Q3/26 ,  H04B7/10 ,  H04B7/26 ,  H04B1/10

CPC分类号： H01Q3/2605

摘要： Signals from multiple signal paths are received using a multi-element antenna and a beam-forming network. Signals from each of the antenna elements are sampled to form a sample vector. Several sample vectors are used to form an auto-covariance matrix. A singular value decomposition of the auto-covariance matrix is used to form three matrices. The first matrix is used to determine the number of signal paths and the second matrix is used to form several polynomials. The polynomial roots that are on or near the unit circle are used to determine points on the unit circle that are associated with each signal path. Each point on the unit circle is used to calculate weights for a beam-forming network that forms a receive beam for each signal path.

摘要翻译： 使用多元天线和波束形成网络来接收来自多个信号路径的信号。 来自每个天线元件的信号被采样以形成采样矢量。 使用几个样本向量来形成自协方差矩阵。 使用自动协方差矩阵的奇异值分解形成三个矩阵。 第一个矩阵用于确定信号路径的数量，第二个矩阵用于形成多个多项式。 在单位圆上或附近的多项式根用于确定与每个信号路径相关联的单位圆上的点。 单位圆上的每个点用于计算形成每个信号路径的接收波束的波束形成网络的权重。

公开(公告)号：US20100118923A1

公开(公告)日：2010-05-13

申请号：US12268994

申请日：2008-11-11

申请人： Debajyoti Pal

发明人： Debajyoti Pal

IPC分类号： H04B1/40

CPC分类号： H04B1/0039 ,  H04B1/0092 ,  H04B1/30

摘要： A receiver uses a wideband intermediate frequency (IF) in the analog domain and performs low IF down-conversion in the digital domain, using low-power, high-speed, high resolution analog-to-digital converters. The receiver can be integrated into an integrated circuit as one of several receivers. Such an integrated circuit may include multiple transmitters using adaptive non-linear modeling pre-distortion. The non-linear modeling may include memory. Imbalance in intermediate frequency in-phase and quadrature signals may be corrected in the digital domains. DC offsets in the intermediate signal may be corrected in both analog and digital domains. In one instance, the receiver provides a feedback receiver for the adaptive pre-distorter in a transmitter on the integrated circuit.

摘要翻译： 接收机在模拟域中使用宽带中频（IF），并使用低功耗，高速，高分辨率模数转换器在数字域中进行低IF下变频。 接收机可以集成到作为几个接收器之一的集成电路中。 这种集成电路可以包括使用自适应非线性建模预失真的多个发射机。 非线性建模可以包括存储器。 中频同相和正交信号的不平衡可以在数字域中进行校正。 中间信号中的直流偏移可以在模拟和数字域两者中进行校正。 在一种情况下，接收机为集成电路中的发射机中的自适应预失真器提供反馈接收机。

公开(公告)号：US06542477B1

公开(公告)日：2003-04-01

申请号：US09281903

申请日：1999-03-31

申请人： Debajyoti Pal ,  Sujai Chari ,  Christopher Hansen ,  Chung-Li Lu

发明人： Debajyoti Pal ,  Sujai Chari ,  Christopher Hansen ,  Chung-Li Lu

IPC分类号： H04B320

CPC分类号： H04B3/235 ,  H04B3/23

摘要： The present invention, generally speaking, provides a digitally-tunable, echo-cancelling analog front end (AFE) for wireline digital communications. The analog front end is especially useful in a High-bit-rate Digital Subscriber Line (HDSL) or HDSL2 environment. An analog echo simulation path is provided capable of simulating echo from a wide variety of echo paths. Digitally controlled attenuators are provided in the transmission path and in the analog echo simulation path. Also provided is a digital-tunable equalizer stage. The equalizer stage is tuned to match the characteristics of the receive path. The same arrangement may be adapted for various DSL technologies, i.e., xDSL. There results an analog front end that is well-adapted to high-speed wireline communications.

摘要翻译： 本发明一般地提供用于有线数字通信的数字可调谐回声消除模拟前端（AFE）。 模拟前端在高比特率数字用户线（HDSL）或HDSL2环境中特别有用。 提供了能够模拟来自各种回波路径的回波的模拟回波模拟路径。 数字控制衰减器设置在传输路径和模拟回波模拟路径中。 还提供了数字可调均衡器级。 调整均衡器级以匹配接收路径的特性。 相同的布置可以适用于各种DSL技术，即xDSL。 结果是模拟前端非常适合高速有线通信。

公开(公告)号：US20110277001A1

公开(公告)日：2011-11-10

申请号：US13102623

申请日：2011-05-06

申请人： Pramod Balkrishna Kaluskar ,  Debajyoti Pal

发明人： Pramod Balkrishna Kaluskar ,  Debajyoti Pal

IPC分类号： H04N7/18 ,  H04L1/00 ,  H04L9/00 ,  H04L12/28

CPC分类号： H04L12/2818 ,  H04L12/2825 ,  H04L12/2834 ,  H04L47/10 ,  H04L63/0272 ,  H04N21/4131 ,  H04N21/43615 ,  H04N21/6125 ,  H04N21/8545

摘要： Disclosed are various embodiments for a gateway device that can execute applications which can communicate with various devices in one or more home networks as well as one or more wide area networks. The gateway device can possess capabilities to communicate over various types of proprietary and/or standardized networks. Additionally, the gateway device can be equipped with the ability to communicate with home devices that are directly coupled to the gateway device. The gateway device can also include a mass storage component that allows storage of data on behalf of applications executed therein.

摘要翻译： 公开了可以执行可以与一个或多个家庭网络以及一个或多个广域网中的各种设备进行通信的应用的网关设备的各种实施例。 网关设备可以具有通过各种类型的专有和/或标准化网络进行通信的能力。 此外，网关设备可以配备与直接耦合到网关设备的家庭设备进行通信的能力。 网关设备还可以包括大容量存储组件，其允许代表其中执行的应用来存储数据。

公开(公告)号：US20100118924A1

公开(公告)日：2010-05-13

申请号：US12269003

申请日：2008-11-11

申请人： Debajyoti Pal

发明人： Debajyoti Pal

IPC分类号： H04B1/38

CPC分类号： H04B1/0039 ,  H04B1/0092 ,  H04B1/30

摘要： A receiver uses a wideband intermediate frequency (IF) in the analog domain and performs low IF down-conversion in the digital domain, using low-power, high-speed, high resolution analog-to-digital converters. The receiver can be integrated into an integrated circuit as one of several receivers. Such an integrated circuit may include multiple transmitters using adaptive non-linear modeling pre-distortion. The non-linear modeling may include memory. Imbalance in intermediate frequency in-phase and quadrature signals may be corrected in the digital domains. DC offsets in the intermediate signal may be corrected in both analog and digital domains. In one instance, the receiver provides a feedback receiver for the adaptive pre-distorter in a transmitter on the integrated circuit.