公开(公告)号：US08891709B2

公开(公告)日：2014-11-18

申请号：US13451199

申请日：2012-04-19

Applicant: Thomas Joseph Kolze ,  Bruce J. Currivan

Inventor： Thomas Joseph Kolze ,  Bruce J. Currivan

IPC: H04B1/10 ,  H04L25/06 ,  H04L25/03 ,  H04L1/00

CPC classification number: H04L25/03019 ,  H04L1/0056 ,  H04L25/03038 ,  H04L25/03057 ,  H04L25/03286 ,  H04L25/067 ,  H04L2025/03496 ,  H04L2025/03617

Abstract: A method and apparatus is disclosed to compensate for interference and/or distortion impressed onto a transmitted communication signal in the presence of one or more time-varying noise and/or interference conditions. A communications receiver includes a noise analyzer to characterize the composition of the interference and/or the distortion and produce a selection signal indicating the composition of the interference and/or the distortion. The communications receiver selects at least one set of equalization coefficients and/or updates at least one parameter of a least-squares algorithm or the suitable equivalent algorithm to compensate for the interference and/or the distortion impressed onto a transmitted communication signal in the presence of a particular time-varying noise and/or interference condition.

Abstract translation: 公开了一种方法和装置，用于在存在一个或多个时变噪声和/或干扰条件的情况下，补偿所发送的通信信号上的干扰和/或失真。 通信接收机包括噪声分析器，用于表征干扰的组成和/或失真，并产生指示干扰的组成和/或失真的选择信号。 通信接收机选择至少一组均衡系数和/或更新最小二乘法算法的至少一个参数或合适的等效算法来补偿在存在发射通信信号的情况下所施加的干扰和/或失真 特定的时变噪声和/或干扰条件。

公开(公告)号：US20140056346A1

公开(公告)日：2014-02-27

申请号：US13594595

申请日：2012-08-24

Applicant: Haoli QIAN ,  Yat-tung LAM ,  Runsheng HE

Inventor： Haoli QIAN ,  Yat-tung LAM ,  Runsheng HE

IPC: H04L27/01

CPC classification number: H04L25/03057 ,  H04B10/6971 ,  H04L2025/03356 ,  H04L2025/03496

Abstract: A decision-feedback equalizer (DFE) can be operated at higher frequencies when parallelization and pre-computation techniques are employed. Disclosed herein is a DFE design suitable for equalizing receive signals with bit rates above 10 GHz, making it feasible to employ decision feedback equalization in silicon-based optical transceiver modules. One illustrative embodiment includes a front end filter to reduce leading intersymbol interference in a receive signal; a serial-to-parallel converter and at least one pre-compensation unit that together convert the filtered signal into grouped sets of tentative decisions, the sets in each group being made available in parallel; a set of pipelined DFE multiplexer units to select a contingent symbol decision from each set of tentative decisions to form groups of contingent symbol decisions based on a presumed sequence of preceding symbol decisions; and an output multiplexer that chooses, based on preceding symbol decisions, one of said groups of contingent symbol decisions.

Abstract translation: 当采用并行化和预计算技术时，判决反馈均衡器（DFE）可以以更高的频率运行。 这里公开了一种DFE设计，其适用于均衡接收信号，比特率高于10GHz，使得在硅基光收发器模块中采用判决反馈均衡是可行的。 一个说明性实施例包括前端滤波器以减少接收信号中的前导符号间干扰; 串行到并行转换器和至少一个预补偿单元，其将滤波的信号一起转换成分组的一组暂定决定，每组中的组并行可用; 一组流水线DFE多路复用器单元，用于从每组暂定决定中选择或有符号决定，以基于先前符号决定的推定序列形成组合的偶然符号决定; 以及输出多路复用器，其基于先前的符号判定来选择所述组的偶然符号决定中的一个。

公开(公告)号：US08180001B2

公开(公告)日：2012-05-15

申请号：US12078923

申请日：2008-04-08

Applicant: Thomas Joseph Kolze ,  Bruce J. Currivan

Inventor： Thomas Joseph Kolze ,  Bruce J. Currivan

IPC: H03D1/04 ,  H03H7/30

CPC classification number: H04L25/03019 ,  H04L1/0056 ,  H04L25/03038 ,  H04L25/03057 ,  H04L25/03286 ,  H04L25/067 ,  H04L2025/03496 ,  H04L2025/03617

Abstract: A method and apparatus is disclosed to compensate for interference and/or distortion impressed onto a transmitted communication signal in the presence of one or more time-varying noise and/or interference conditions. A communications receiver includes a noise analyzer to characterize the composition of the interference and/or the distortion impressed onto a transmitted communication signal in the presence of one or more time-varying noise and/or interference conditions. In an exemplary embodiment, the communications receiver selects at least one set of equalization coefficients and/or updates at least one parameter of a least-squares algorithm or the suitable equivalent algorithm to compensate for a particular interference and/or the distortion impressed onto the transmitted communication signal. In another exemplary embodiment, the communications receiver selects a corresponding adaptive equalizer from an adaptive equalizer bank to compensate for a particular interference and/or the distortion impressed onto the transmitted communication signal.

Abstract translation: 公开了一种方法和装置，用于在存在一个或多个时变噪声和/或干扰条件的情况下，补偿所发送的通信信号上的干扰和/或失真。 通信接收机包括噪声分析器，用于在存在一个或多个时变噪声和/或干扰条件的情况下表征干扰的组成和/或在发射的通信信号上所施加的失真。 在示例性实施例中，通信接收器选择至少一组均衡系数和/或更新最小二乘法算法的至少一个参数或合适的等效算法来补偿特定的干扰和/ 通信信号。 在另一个示例性实施例中，通信接收机从自适应均衡器组中选择相应的自适应均衡器来补偿特定的干扰和/或印制在所发送的通信信号上的失真。

公开(公告)号：US07773700B2

公开(公告)日：2010-08-10

申请号：US11178117

申请日：2005-07-08

Applicant: Kyung Won Kang ,  Woo Chan Kim ,  In Hwan Choi ,  Byoung Gill Kim ,  Yong Hak Suh

Inventor： Kyung Won Kang ,  Woo Chan Kim ,  In Hwan Choi ,  Byoung Gill Kim ,  Yong Hak Suh

IPC: H04L27/06 ,  H03H7/30

CPC classification number: H04L25/022 ,  H04L25/0212 ,  H04L25/03159 ,  H04L2025/03496 ,  H04L2025/03522 ,  H04L2025/03617 ,  H04N5/211 ,  H04N5/4401

Abstract: Channel Equalization of a digital TV is disclosed. In channel equalization for restoring an original signal from a digital TV reception signal having passed through a channel, the present invention includes estimating an impulse response of the channel from a received signal having passed through the channel using conjugate-gradient algorithm, finding an equalizer coefficient in a frequency domain using the estimated impulse response of the channel, outputting a signal equalized by multiplying a signal resulting from transforming the received signal into the frequency domain by the found equalizer coefficient, and predicting to remove an amplified noise of the equalized signal using the conjugate-gradient algorithm in a time domain. Accordingly, the variation of the channel impulse response according to time can be tracked in the dynamic channel having fast channel variation as well as the static channel, whereby equalizing performance can be enhanced.

Abstract translation: 数字电视的频道均衡被公开。 在用于从已经通过信道的数字TV接收信号恢复原始信号的信道均衡中，本发明包括使用共轭梯度算法从已经通过信道的接收信号估计信道的脉冲响应，找到均衡器系数 在使用所述信道的所述估计的脉冲响应的频域中，通过将由所述接收信号变换为频域而得到的信号乘以所述均衡器系数，输出均衡的信号，并且使用所述均衡信号来预测去除所述均衡信号的放大噪声 在时域中的共轭梯度算法。 因此，可以在具有快速信道变化的动态信道以及静态信道中跟踪根据时间的信道脉冲响应的变化，从而可以提高均衡性能。

公开(公告)号：US20100135372A1

公开(公告)日：2010-06-03

申请号：US12698639

申请日：2010-02-02

Applicant: Oscar E. Agazzi ,  David Kruse ,  Arthur Abnous ,  Mehdi Hatamian

Inventor： Oscar E. Agazzi ,  David Kruse ,  Arthur Abnous ,  Mehdi Hatamian

IPC: H04B1/38 ,  H04B1/10

CPC classification number: H04L7/0062 ,  G01R31/3004 ,  G01R31/3008 ,  G01R31/3016 ,  G01R31/31715 ,  G01R31/318502 ,  G01R31/318552 ,  G01R31/318594 ,  H04B3/23 ,  H04B3/32 ,  H04L1/0054 ,  H04L1/006 ,  H04L1/242 ,  H04L7/0334 ,  H04L25/03038 ,  H04L25/03057 ,  H04L25/03146 ,  H04L25/03267 ,  H04L25/067 ,  H04L25/14 ,  H04L25/4917 ,  H04L25/497 ,  H04L2025/03363 ,  H04L2025/03369 ,  H04L2025/03477 ,  H04L2025/0349 ,  H04L2025/03496 ,  H04L2025/03503 ,  H04L2025/03617 ,  H04L2025/03745

Abstract: A feedforward equalizer for equalizing a sequence of signal samples received by a receiver from a remote transmitter. The feedforward equalizer has a gain and is included in the receiver which includes a timing recovery module for setting a sampling phase and a decoder. The feedforward equalizer comprises a non-adaptive filter and a gain stage. The non-adaptive filter receives the signal samples and produces a filtered signal. The gain stage adjusts the gain of the feedforward equalizer by adjusting the amplitude of the filtered signal. The amplitude of the filtered signal is adjusted so that it fits in the operational range of the decoder. The feedforward equalizer does not affect the sampling phase setting of the timing recovery module of the receiver.

Abstract translation: 前馈均衡器，用于均衡来自远程发射机的接收机接收的信号样本序列。 前馈均衡器具有增益并且被包括在接收机中，该接收机包括用于设置采样相位和解码器的定时恢复模块。 前馈均衡器包括非自适应滤波器和增益级。 非自适应滤波器接收信号样本并产生滤波信号。 增益级通过调整滤波信号的幅度来调节前馈均衡器的增益。 调整滤波后的信号的幅度使其适合于解码器的操作范围。 前馈均衡器不影响接收机的定时恢复模块的采样相位设置。

公开(公告)号：US07711031B2

公开(公告)日：2010-05-04

申请号：US11766814

申请日：2007-06-22

Applicant: Mirette Sadek ,  Nabil Yousef

Inventor： Mirette Sadek ,  Nabil Yousef

IPC: H04L27/30

CPC classification number: H04L25/0216 ,  H04L1/0047 ,  H04L1/0054 ,  H04L25/0218 ,  H04L25/022 ,  H04L25/0232 ,  H04L25/0236 ,  H04L25/0244 ,  H04L25/03038 ,  H04L25/03286 ,  H04L2025/03414 ,  H04L2025/03496 ,  H04L2025/03522 ,  H04L2025/03617

Abstract: ICI canceling in an OFDM system includes taking a FFT of a wireless electrical signal to produce an OFDM signal; estimating a DC component of a frequency-selective channel in the OFDM system; obtaining an initial estimate of data symbols associated with data bits of the OFDM signal; correcting the data bits with a Viterbi decoder; encoding the corrected data bits to acquire corrected data symbols; re-estimating the DC component of the frequency-selective channel using the corrected data symbols; filtering the corrected data symbols and sub-carrier of the frequency-selective channel; calculating a first order differential function of the frequency-selective channel based on successive ones of the corrected data symbols; removing an ICI component from the calculated first order differential function; and re-estimating the data symbols as a function of the removed ICI component. The filtering occurs using a low pass filter comprising a bank of eight filters.

Abstract translation: OFDM系统中的ICI取消包括对无线电信号进行FFT以产生OFDM信号; 估计所述OFDM系统中的频率选择信道的直流分量; 获得与所述OFDM信号的数据比特相关联的数据符号的初始估计; 用维特比解码器校正数据位; 编码校正的数据位以获取校正的数据符号 使用校正的数据符号重新估计频率选择信道的DC分量; 对频率选择信道的校正数据符号和子载波进行滤波; 基于经校正的数据符号中的连续的一个，计算频率选择信道的一阶微分函数; 从计算的一阶微分函数中去除ICI分量; 并重新估计作为所移除的ICI分量的函数的数据符号。 使用包括八个滤波器组的低通滤波器进行滤波。

公开(公告)号：US07616714B2

公开(公告)日：2009-11-10

申请号：US10992902

申请日：2004-11-19

Applicant: Mario Träber

Inventor： Mario Träber

IPC: H03D1/00

CPC classification number: H04L1/20 ,  H04L1/0054 ,  H04L1/006 ,  H04L2025/03496

Abstract: A device and method for predicting noise in a signal that is received by a digital receiver is provided. The device includes an autocorrelation function determination device and a noise predictor device. Also included in the device is an adaptive filter that produces a prediction error value for the received signal and the adaptive filter adjusts the filter coefficients as a function of a prediction error of the adaptive filter. Using the filter coefficient of the adaptive filter, the method may determine the autocorrelation function of the received signal. The noise estimated values for the noise contained in the received signal may be computed on a basis of the autocorrelation function of the received signal. The embodiment also may facilitate noise prediction when heavy correlated noise is present.

Abstract translation: 提供了一种用于预测由数字接收机接收的信号中的噪声的装置和方法。 该装置包括自相关函数确定装置和噪声预测装置。 还包括在装置中的是自适应滤波器，其产生接收信号的预测误差值，并且自适应滤波器根据自适应滤波器的预测误差调整滤波器系数。 使用自适应滤波器的滤波器系数，该方法可以确定接收信号的自相关函数。 可以基于接收信号的自相关函数来计算包含在接收信号中的噪声的噪声估计值。 当存在大的相关噪声时，该实施例还可以促进噪声预测。

公开(公告)号：US07599455B2

公开(公告)日：2009-10-06

申请号：US11361666

申请日：2006-02-24

Applicant: Norbert Neurohr ,  Matthias Schöbinger

Inventor： Norbert Neurohr ,  Matthias Schöbinger

IPC: H04B1/10

CPC classification number: H04L25/03057 ,  H04L2025/03496

Abstract: A method and a device for determining an output sequence of output elements from an input sequence of input elements is provided, the method or the device being implemented according to a decision feedback equalizer. The adaptation of coefficients of the equalizer is performed on the basis of an estimated error determined as a function of a scaling (a, c0). According to the invention the scaling (a, c0) is determined such that it differs from a nominal input value by a deviation value during transmission without symbol interference. The deviation value is dependent on non-compensatable inter-symbol interference.

Abstract translation: 提供了一种用于从输入元件的输入序列确定输出元件的输出序列的方法和装置，所述方法或装置根据判决反馈均衡器来实现。 基于作为缩放（a，c0）的函数确定的估计误差来执行均衡器的系数的适配。 根据本发明，缩放（a，c0）被确定为使得其在标称输入值与传输之间的偏差值不同，而没有符号干扰。 偏差值取决于不可补偿的符号间干扰。

公开(公告)号：US20090199035A1

公开(公告)日：2009-08-06

申请号：US12364530

申请日：2009-02-03

Applicant: Liang-Wei Huang ,  Chih-Yung Shih ,  Shieh-Hsing Kuo

Inventor： Liang-Wei Huang ,  Chih-Yung Shih ,  Shieh-Hsing Kuo

IPC: G06F1/12

CPC classification number: H04L7/0062 ,  H04L7/0029 ,  H04L25/03057 ,  H04L25/05 ,  H04L2025/03496

Abstract: A network signal processing circuit includes a first signal processing module, a first sampling rate converter, a second signal processing module, a second sampling rate converter and a timing controller. The first signal processing module is utilized for processing a network signal to output a first processed signal. The first sampling rate converter is utilized for performing signal frequency conversion on the first processed signal according to a first clock timing adjusting signal and outputting a first converted signal. The second signal processing module is utilized for processing the first converted signal to output a second processed signal. The second sampling rate converter is utilized for performing signal frequency conversion on the second processed signal according to a second clock timing adjusting signal and outputting a second converted signal. The timing controller is utilized for generating the first and second clock timing adjusting signals.

Abstract translation: 网络信号处理电路包括第一信号处理模块，第一采样率转换器，第二信号处理模块，第二采样率转换器和定时控制器。 第一信号处理模块用于处理网络信号以输出第一处理信号。 第一采样率转换器用于根据第一时钟定时调整信号对第一处理信号进行信号频率转换并输出第一转换信号。 第二信号处理模块用于处理第一转换信号以输出第二处理信号。 第二采样率转换器用于根据第二时钟定时调整信号对第二处理信号执行信号频率转换，并输出第二转换信号。 定时控制器用于产生第一和第二时钟定时调整信号。

公开(公告)号：US20090103669A1

公开(公告)日：2009-04-23

申请号：US12078923

申请日：2008-04-08

Applicant: Thomas Joseph Kolze ,  Bruce J. Currivan

Inventor： Thomas Joseph Kolze ,  Bruce J. Currivan

IPC: H03D1/04 ,  H03H7/30

CPC classification number: H04L25/03019 ,  H04L1/0056 ,  H04L25/03038 ,  H04L25/03057 ,  H04L25/03286 ,  H04L25/067 ,  H04L2025/03496 ,  H04L2025/03617

Abstract: A method and apparatus is disclosed to compensate for interference and/or distortion impressed onto a transmitted communication signal in the presence of one or more time-varying noise and/or interference conditions. A communications receiver includes a noise analyzer to characterize the composition of the interference and/or the distortion impressed onto a transmitted communication signal in the presence of one or more time-varying noise and/or interference conditions. The noise analyzer produces a selection signal indicating the composition of the interference and/or the distortion impressed onto a transmitted communication signal in the presence of one or more time-varying noise and/or interference conditions to be used by the communications receiver. In an exemplary embodiment, the communications receiver selects at least one set of equalization coefficients and/or updates at least one parameter of a least-squares algorithm or the suitable equivalent algorithm to compensate for the interference and/or the distortion impressed onto a transmitted communication signal in the presence of a particular time-varying noise and/or interference condition. In another exemplary embodiment, the communications receiver selects a corresponding adaptive equalizer from an adaptive equalizer bank to compensate for the interference and/or the distortion impressed onto a transmitted communication signal in the presence of the particular time-varying noise and/or interference condition.

Abstract translation: 公开了一种方法和装置，用于在存在一个或多个时变噪声和/或干扰条件的情况下，补偿所发送的通信信号上的干扰和/或失真。 通信接收机包括噪声分析器，用于在存在一个或多个时变噪声和/或干扰条件的情况下表征干扰的组成和/或在发射的通信信号上所施加的失真。 在由通信接收机使用的一个或多个时变噪声和/或干扰条件的情况下，噪声分析器产生指示干扰的组成和/或被施加到发射的通信信号上的失真的选择信号。 在示例性实施例中，通信接收器选择至少一组均衡系数和/或更新最小二乘法算法或合适的等效算法的至少一个参数以补偿被施加到发送通信上的干扰和/或失真 在存在特定的时变噪声和/或干扰条件的情况下发出信号。 在另一个示例性实施例中，通信接收机从自适应均衡器组中选择相应的自适应均衡器，以在存在特定的时变噪声和/或干扰条件的情况下补偿被施加到所发送的通信信号上的干扰和/或失真。