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    Adaptation of crossing DFE tap weight
    1.
    发明授权
    Adaptation of crossing DFE tap weight 有权

    公开(公告)号：US09762381B2

    公开(公告)日：2017-09-12

    申请号：US13935391

    申请日：2013-07-03

    申请人： NVIDIA CORPORATION

    发明人： Lizhi Zhong ,  Vishnu Balan ,  Gautam Bhatia

    IPC分类号： H04L7/00 ,  H04L25/03 ,  H04L7/033

    CPC分类号： H04L7/0087 ,  H04L7/0025 ,  H04L7/0058 ,  H04L7/033 ,  H04L25/03057 ,  H04L2025/03484 ,  H04L2025/03605

    摘要： A method comprises receiving an input signal at an input of a receiver and retrieving a data sample signal and an error sample signal from the input signal. The method also comprises applying an adaptive procedure to generate a feedback code using the data sample signal and the error sample signal for feeding back into a decision feedback equalization (DFE) module. Further, it comprises converting the feedback code into a corresponding voltage value and assigning the corresponding voltage value as a tap weight for the DFE module. Finally, it comprises generating an edge sample signal by applying DFE to the input signal using the DFE module, wherein the DFE is based on the tap weight.

    Low power and low complexity adaptive self-linearization
    3.
    发明授权
    Low power and low complexity adaptive self-linearization 失效
    低功耗和低复杂度的自适应自适应线性化

    公开(公告)号：US08620981B2

    公开(公告)日：2013-12-31

    申请号：US13220504

    申请日：2011-08-29

    申请人： Roy G. Batruni

    发明人： Roy G. Batruni

    IPC分类号： G06F17/10

    CPC分类号： H04L25/03038 ,  H04L2025/03477 ,  H04L2025/03484

    摘要： A digital signal processing system comprising: an input terminal to receive an input signal that includes a distorted component and an undistorted component, the input signal having a sampling rate of R; and an adaptive self-linearization module coupled to the input terminal, to perform self-linearization based at least in part on the input signal to obtain an output signal that is substantially undistorted, wherein: the adaptive self-linearization module is to generate a replica distortion signal that is substantially similar to the distorted component, the generation being based at least in part on a target component having a sampling rate of R/L, L being an integer greater than 1; the adaptive self-linearization module includes a first digital signal processor (DSP) that is adapted to obtain a filter transfer function that approximates a system distortion transfer function, and a second DSP that is configured using configuration parameters of the first DSP.

    摘要翻译： 一种数字信号处理系统，包括：输入端，用于接收包括失真分量和未失真分量的输入信号，所述输入信号具有采样率R; 以及耦合到所述输入端子的自适应自线性化模块，至少部分地基于所述输入信号执行自线性化，以获得基本上未失真的输出信号，其中：所述自适应自线性化模块要生成副本 所述失真信号基本上类似于失真分量，所述产生至少部分地基于具有R / L的采样率的目标分量，L是大于1的整数; 自适应自线性化模块包括适于获得逼近系统失真传递函数的滤波器传递函数的第一数字信号处理器（DSP）和使用第一DSP的配置参数配置的第二DSP。

    SYSTEM AND ALGORITHM FOR MULTIPATH MITIGATION
    4.
    发明申请
    SYSTEM AND ALGORITHM FOR MULTIPATH MITIGATION 有权
    用于多路减速的系统和算法

    公开(公告)号：US20130329840A1

    公开(公告)日：2013-12-12

    申请号：US13914691

    申请日：2013-06-11

    申请人： BAE Systems Information And Electronic Systems Integration Inc.

    发明人： Gary R. Lomp

    IPC分类号： H04B1/10

    CPC分类号： H04B1/1081 ,  H04L25/03057 ,  H04L2025/03484 ,  H04L2025/03605 ,  H04L2025/03681

    摘要： A system and method for optimally combining multi-path signals is presented. A first signal is received that traveled a first path from a transmitter to a receiving location and a second signal is received that traveled a different second path from the transmitter to the same receiving location. The paths are different so that the first and second signals contain the same signal data but the first signal has a first distortion that is different than a second distortion in the second signal. According to an objective function, the method adaptively generates a first weight value and a second weight value. The first and second weight values are applied to the respective first and second signals to produce respective first and second weighted signals. The first and second weighted signals are linearly combined producing a combined signal with a combined signal degradation.

    摘要翻译： 提出了一种用于最佳组合多路径信号的系统和方法。 接收到从发射机到接收位置行进第一路径的第一信号，并且接收到将不同的第二路径从发射机行进到同一接收位置的第二信号。 路径是不同的，使得第一和第二信号包含相同的信号数据，但是第一信号具有与第二信号中的第二失真不同的第一失真。 根据目标函数，该方法自适应地产生第一权重值和第二权重值。 将第一和第二加权值应用于相应的第一和第二信号以产生相应的第一和第二加权信号。 第一和第二加权信号被线性组合，产生具有组合信号劣化的组合信号。

    Systems, circuits and methods for adapting parameters of components in a receiver
    5.
    发明授权
    Systems, circuits and methods for adapting parameters of components in a receiver 有权
    用于调整接收机中组件参数的系统，电路和方法

    公开(公告)号：US08401064B1

    公开(公告)日：2013-03-19

    申请号：US12973819

    申请日：2010-12-20

    申请人： Andrew Lin ,  Faramarz Bahmani

    发明人： Andrew Lin ,  Faramarz Bahmani

    IPC分类号： H03K5/159 ,  H03H7/30 ,  H03H7/40

    CPC分类号： H04L25/03267 ,  H04L2025/03484 ,  H04L2025/03675

    摘要： A receiver is optimized by adapting parameters of components within the receiver. Various component parameters are adapted by using either a least means squared algorithm or a steepest descent algorithm. The taps of a decision feedback equalizer can be adapted by using either a least means squared algorithm or a steepest descent algorithm. The gain value of a linear equalizer and the input of a digital to analog converter coupled to the linear equalizer are also adapted through the least means squared algorithm or a steepest descent algorithm. A variable gain amplifier is also capable of being adapted through the use of the least means squared algorithm. Clock offsets are also configured by use of a steepest descent algorithm.

    摘要翻译： 通过调整接收机内的组件的参数来优化接收机。 通过使用最小均方算法或最速下降算法来适应各种分量参数。 决策反馈均衡器的抽头可以通过使用最小均方算法或最速下降算法进行调整。 线性均衡器的增益值和耦合到线性均衡器的数模转换器的输入也通过最小均方算法或最速下降算法来适应。 可变增益放大器还能够通过使用最小均方算法来适应。 时钟偏移也通过使用最速下降算法进行配置。

    Channel tracking using step size based on norm-1 based errors across multiple OFDM symbols
    7.
    发明授权
    Channel tracking using step size based on norm-1 based errors across multiple OFDM symbols 有权
    使用基于在多个OFDM符号上的基于范数-1的误差的步长的信道跟踪

    公开(公告)号：US07362812B1

    公开(公告)日：2008-04-22

    申请号：US10839265

    申请日：2004-05-06

    申请人： Ping Hou ,  Yong Li

    发明人： Ping Hou ,  Yong Li

    IPC分类号： H04K1/10

    CPC分类号： H04L25/03159 ,  H04L2025/03414 ,  H04L2025/03484 ,  H04L2025/03617 ,  H04L2025/03687

    摘要： A channel tracking module, configured for generating updated equalization coefficients for a frequency equalizer, is configured for determining a digital-based error value between equalized signals output by the frequency equalizer relative to predicted signals, for each subcarrier frequency of an OFDM symbol. The channel tracking module determines an accumulated error based on accumulating the digital-based error values for all the subcarrier frequencies of the OFDM symbol, for a prescribed successive number of OFDM symbols. The channel tracking module also determines a step size based on the accumulated error and relative to a prescribed step function configured for optimizing equalizer adjustments within stability limits. The channel tracking updates the equalization coefficients for each subscarrier frequency based on the accumulated error and the step size. Hence, the channel tracking module can be implemented in an economical manner while ensuring optimum equalizer adjustments within stability limits that ensure convergence of the equalization coefficients.

    摘要翻译： 配置用于生成用于频率均衡器的更新的均衡系数的信道跟踪模块被配置为针对OFDM符号的每个子载波频率，确定由频率均衡器相对于预测信号输出的均衡信号之间的基于数字的误差值。 信道跟踪模块基于为OFDM符号的规定的连续数量的OFDM符号的所有副载波频率累积基于数字的误差值来确定累积误差。 信道跟踪模块还基于累积误差并且相对于配置用于在稳定限度内优化均衡器调整的规定步长函数来确定步长。 信道跟踪基于累积误差和步长来更新每个子载波频率的均衡系数。 因此，可以以经济的方式实现信道跟踪模块，同时确保在确定均衡系数的收敛的稳定性限制内的最佳均衡器调整。

    Pre-distortion method for telecommunication system and transmitter for mobile terminal of MC-CDMA telecommunication system
    8.
    发明授权
    Pre-distortion method for telecommunication system and transmitter for mobile terminal of MC-CDMA telecommunication system 失效
    MC-CDMA电信系统移动终端电信系统和发射机预失真方法

    公开(公告)号：US07315530B2

    公开(公告)日：2008-01-01

    申请号：US10335898

    申请日：2003-01-03

    申请人： Damien Castelain ,  David Mottier

    发明人： Damien Castelain ,  David Mottier

    IPC分类号： H04B7/216

    CPC分类号： H04B1/707 ,  H04L5/026 ,  H04L25/03343 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03484

    摘要： The invention concerns a pre-distortion method for a telecommunication system comprising a base station and at least one user. Each symbol of said user is spread with a coding sequence over a plurality of carriers to produce a plurality of corresponding frequency components of a signal (Si(t)) to be transmitted over an uplink transmission channel to said base station. Each of said frequency components is weighted by a weighting coefficient (ωi(l)), said weighting coefficients being determined from the channel response coefficients (hi(l)) of the corresponding downlink transmission channel at the respective frequencies of said carriers and from a value of the noise variance (σ2) affecting said carriers.

    摘要翻译： 本发明涉及一种包括基站和至少一个用户的电信系统的预失真方法。 所述用户的每个符号通过多个载波上的编码序列进行扩展，以产生要通过上行链路传输信道发送的信号（S）的多个相应的频率分量（S（i）（t））到 说基地台。 所述频率分量中的每一个被加权系数加权，所述加权系数根据信道响应系数（h i i（i））确定， 在所述载波的各个频率处的对应的下行链路传输信道和影响所述载波的噪声方差（σ 2）的值。

    Estimating channel impulse response and equalizer coefficients in UWB communication systems
    10.
    发明申请
    Estimating channel impulse response and equalizer coefficients in UWB communication systems 有权
    估计UWB通信系统中的信道脉冲响应和均衡器系数

    公开(公告)号：US20040185787A1

    公开(公告)日：2004-09-23

    申请号：US10616875

    申请日：2003-07-10

    发明人： Andreas Molisch ,  Ye Li ,  Jinyun Zhang

    IPC分类号： H04B017/00

    CPC分类号： H04B1/71637 ,  H04B1/709 ,  H04B1/719 ,  H04L1/203 ,  H04L25/0212 ,  H04L25/0226 ,  H04L25/03012 ,  H04L2025/03484

    摘要： A method estimates a channel impulse response in an ultra wide bandwidth (UWB) system. Multiple training sequences modulated at a chip rate are received. Each training sequence is sampled by parallel with multiple correlators at sampling rate substantially slower than the chip rate to obtain a samples over a time interval of the impulse response at a resolution substantially equal to the chip rate, and then estimating the channel impulse response from these samples.

    摘要翻译： 一种方法估计超宽带（UWB）系统中的信道脉冲响应。 接收以码片速率调制的多个训练序列。 每个训练序列以与码片速率相比更慢的采样速率与多个相关器并联进行采样，以在基本上等于码片速率的分辨率下在脉冲响应的时间间隔上获得采样，然后从这些估计信道脉冲响应 样品。