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51.发明授权System and method for linear distortion estimation by way of equalizer coefficients 有权通过均衡器系数进行线性失真估计的系统和方法公开(公告)号：US07602867B2
公开(公告)日：2009-10-13
申请号：US11046783
申请日：2005-02-01
申请人： Thomas J. Kolze , Bruce J. Currivan
发明人： Thomas J. Kolze , Bruce J. Currivan
IPC分类号： H04B1/10
CPC分类号： H04L25/03019 , H04B1/1027 , H04B1/123 , H04L25/022 , H04L25/03343 , H04L2025/03617
摘要： Provided is a method and system for estimating distortion in a communications channel including an adaptive equalizer. The method includes determining one or more adaptive filter coefficients associated with a signal passed through the equalizer. The method also includes estimating un-equalized channel distortion based upon the determined adaptive filter coefficients.
摘要翻译： 提供了一种用于估计包括自适应均衡器的通信信道中的失真的方法和系统。 该方法包括确定与通过均衡器的信号相关联的一个或多个自适应滤波器系数。 该方法还包括基于所确定的自适应滤波器系数估计不均衡的信道失真。
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公开(公告)号：US07313122B2
公开(公告)日：2007-12-25
申请号：US10225963
申请日：2002-08-22
IPC分类号： H04B7/216
CPC分类号： H04L5/026 , H04B1/7103 , H04L2027/0065
摘要： “Multiple approaches are presented herein to perform CFO correction within CDMA systems having multiple users. Any communication receiver may be adapted to perform the CFO correction in this manner CDM. One approach assumes a diagonal CFO matrix to decouple the different codes' soft symbol decisions, and each soft symbol decision is independently corrected to obtain hard decisions. Another approach employs direct CFO matrix inversion and multiplies it by a despread soft symbol decision vector to obtain corrected soft symbol decisions. Another approach first performs a single-user correction on the despread soft symbol decisions so, which are then sliced to obtain initial hard decisions. In the next step of this particular approach the initial hard decisions are multiplied by the CFO coefficients to obtain an estimate for the undesired ICI, which is then subtracted from the despread soft symbol decisions to obtain cleaner soft symbol decisions, which then can undergo slicing.”
摘要翻译： 本文提出了多种方法来执行具有多个用户的CDMA系统内的CFO校正。 任何通信接收机可以适于以这种方式执行CFO校正。 一种方法假设对角线CFO矩阵来解耦不同码的软符号决定，并且每个软符号决定被独立地校正以获得硬判决。 另一种方法采用直接CFO矩阵反演，并将其乘以去扩展的软符号决策矢量以获得校正的软符号决定。 另一种方法首先对解扩的软符号决定进行单用户校正，然后对其进行切片以获得初始硬判决。 在该特定方法的下一步骤中，将初始硬判决乘以CFO系数以获得不期望的ICI的估计，然后从解扩的软符号决定中减去该估计，以获得更清洁的软符号决定，然后可以进行切片 。
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公开(公告)号：US20070263754A1
公开(公告)日：2007-11-15
申请号：US11798439
申请日：2007-05-14
申请人： Bruce J. Currivan , Thomas J. Kolze , Loke K. Tan , Hanli Zou , Johnathan S. Min
发明人： Bruce J. Currivan , Thomas J. Kolze , Loke K. Tan , Hanli Zou , Johnathan S. Min
IPC分类号： H04B1/10
CPC分类号： H04B1/406 , H04B1/0003 , H04B1/001
摘要： Hardware allocation techniques are described for use in a multi-channel communication environment. The techniques may be used to reduce the number of gates needed for processing and/or to improve the efficiency and/or speed of a communication system. For example, resources that are under-utilized may be removed or allocated to another operation or user. In an exemplary implementation, a receiver includes a plurality of signal processing modules corresponding to respective channels and a hardware allocation module. The hardware allocation module allocates resources in the signal processing modules based on utilization of at least one of the resources.
摘要翻译： 硬件分配技术被描述用于在多信道通信环境中使用。 这些技术可以用于减少处理所需的门的数量和/或提高通信系统的效率和/或速度。 例如，未充分利用的资源可能被删除或分配给另一个操作或用户。 在示例性实现中，接收机包括对应于各个信道的多个信号处理模块和硬件分配模块。 硬件分配模块基于至少一个资源的利用来分配信号处理模块中的资源。
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公开(公告)号：US07104534B2
公开(公告)日：2006-09-12
申请号：US09916576
申请日：2001-07-30
申请人： Bruce J. Currivan , Jonathan S. Min , Fang Lu
发明人： Bruce J. Currivan , Jonathan S. Min , Fang Lu
IPC分类号： B23Q3/08
CPC分类号： H04L12/44 , H04L12/2801
摘要： A system for detecting collisions in a shared communications medium, such as a TDMA medium, includes a receive path adapted to generate a first intermediate signal, a second intermediate signal, and a data symbol sequence from an input signal. A preamble detection module generates a correlation metric from the first intermediate signal. A power measurement module generates a power indication signal from the second intermediate signal. A noise measurement module generates a noise indication signal from the second intermediate signal and the data symbol sequence. A processing module is adapted to characterize the input signal as a collision for certain values of correlation metric, power indication signal, and noise indication signal.
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55.发明授权公开(公告)号：US07050516B2
公开(公告)日：2006-05-23
申请号：US10391555
申请日：2003-03-20
CPC分类号： H04L1/20 , H04L1/0003
摘要： A system for periodic noise avoidance including a timing discriminator receiving an input signal from a communications channel. The input signal includes data packets and empty slots with periodic noise. The timing discriminator outputs a first error measurement of periodic noise width and a second error measurement of periodic noise position. A first loop filter inputs the first error measurement and outputs a width of the empty slots. A second loop filter inputs the second error measurement and outputs a frequency of the periodic noise. An oscillator inputs the width of the empty slots and the frequency, and outputs an empty slot waveform to the timing discriminator.
摘要翻译： 一种用于周期性噪声回避的系统，包括接收来自通信信道的输入信号的定时鉴别器。 输入信号包括具有周期性噪声的数据包和空槽。 定时鉴别器输出周期性噪声宽度的第一误差测量值和周期噪声位置的第二误差测量值。 第一个环路滤波器输入第一个误差测量值，并输出空时隙的宽度。 第二个环路滤波器输入第二个误差测量并输出周期性噪声的频率。 振荡器输入空插槽的宽度和频率，并将空槽波形输出到定时鉴频器。
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公开(公告)号：US08948316B2
公开(公告)日：2015-02-03
申请号：US13428309
申请日：2012-03-23
CPC分类号： H04L25/022 , H04L25/03 , H04L25/03006
摘要： Upstream frequency response measurement and characterization. Signaling is provided between respective communication devices within a communication system. Based upon at least one of these signals, one of the communication devices captures a number of sample sets corresponding thereto at different respective frequencies (e.g., a different respective center frequencies, frequency bands, etc.). Then, spectral analysis is performed with respect to each of the sample sets to generate a respective and corresponding channel response estimate there from. After this number of channel response estimates is determined, they are combined or splice together to generate a full channel response estimate. In implementations including an equalizer, different respective sample sets may correspond to those that have undergone equalization processing and those that have not.
摘要翻译： 上行频率响应测量和表征。 在通信系统内的各个通信设备之间提供信令。 基于这些信号中的至少一个，通信设备之一以不同的相应频率（例如，不同的相应中心频率，频带等）捕获与其对应的多个采样集。 然后，相对于每个样本集执行频谱分析，以从其中产生相应和相应的信道响应估计。 在确定了这个数量的信道响应估计之后，将它们组合或拼接在一起以产生全信道响应估计。 在包括均衡器的实现中，不同的相应样本集可以对应于已经经历均衡处理的那些样本集合，以及未经均衡处理的那些。
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公开(公告)号：US08774332B2
公开(公告)日：2014-07-08
申请号：US12340603
申请日：2008-12-19
申请人： Thomas J. Kolze , Bruce J. Currivan
发明人： Thomas J. Kolze , Bruce J. Currivan
IPC分类号： H04L1/00
CPC分类号： H04L25/061 , H04L25/022 , H04L25/0228 , H04L25/0236 , H04L25/03292 , H04L27/2647
摘要： Based on tracked amplitude modulation (e.g., which may be hum modulation), compensation for amplitude modulation is applied across all orthogonal signal components of a non-time based orthogonal coded signal. Some examples of such non-time based orthogonal coded signals include an orthogonal frequency division multiplexing (OFDM) signal, a synchronous code division multiple access (S-CDMA) signal, or a code division multiple access (CDMA) signal, etc. The compensation may be applied to the signal across multiple frames, on a frame by frame basis, or intra-frame (i.e., changing and compensating differently within a frame). This compensation for amplitude modulation may be applied in conjunction with adaptive equalization in which different filter taps are applied to each respective orthogonal signal component of the signal. Also, automatic gain control (AGC) may be performed (e.g., before digital sampling) of a received signal in conjunction with the amplitude modulation compensation.
摘要翻译： 基于跟踪的幅度调制（例如，其可以是哼声调制），对于基于非时间的正交编码信号的所有正交信号分量施加幅度调制的补偿。 这种非时间正交编码信号的一些示例包括正交频分复用（OFDM）信号，同步码分多址（S-CDMA）信号或码分多址（CDMA）信号等）。 可以跨越多个帧，逐帧地应用于信号，或者帧内（即在一帧内不同地改变和补偿）。 对幅度调制的这种补偿可以结合自适应均衡来应用，其中不同的滤波器抽头被应用于信号的每个相应的正交信号分量。 此外，结合幅度调制补偿，可以对接收信号进行自动增益控制（AGC）（例如，在数字采样之前）。
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58.发明授权公开(公告)号：US08724689B2
公开(公告)日：2014-05-13
申请号：US13406877
申请日：2012-02-28
申请人： Bruce J. Currivan , Thomas J. Kolze , Roger Fish , Victor T. Hou
发明人： Bruce J. Currivan , Thomas J. Kolze , Roger Fish , Victor T. Hou
IPC分类号： H04L27/01
CPC分类号： H04L25/03057 , H04L25/022
摘要： Narrowband ingress estimation and characterization using equalizer taps. A equalizer including a feed forward equalizer (FFE) and a decision feedback equalizer (DFE) is implemented to process an input signal thereby generating an output signal. Analysis of the frequency response of the equalizer including the FFE and the DFE of the equalizer allows for the determination of whether or not narrowband ingress exists within the signal received by the equalizer. For example, analysis of the signal output from the equalizer provides for determination of the overall frequency response of the equalizer. In addition, analysis of the respective equalizer coefficients within one or both of the FFE and the DFE of the equalizer may be used to determine the overall frequency response of the equalizer. Narrowband ingress may be identified when the combination of the FFE (having a notch therein) and the DFE provides for an overall flat frequency response.
摘要翻译： 使用均衡器抽头的窄带入口估计和表征。 实现包括前馈均衡器（FFE）和判决反馈均衡器（DFE）的均衡器来处理输入信号从而产生输出信号。 对包括均衡器的FFE和DFE的均衡器的频率响应的分析允许确定在均衡器接收到的信号内是否存在窄带入口。 例如，从均衡器输出的信号的分析提供了均衡器的总频率响应的确定。 此外，可以使用均衡器的FFE和DFE中的一个或两个内的相应均衡器系数的分析来确定均衡器的总体频率响应。 当FFE（其中有凹口）和DFE的组合提供整体平坦的频率响应时，可以识别窄带入口。
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公开(公告)号：US08571137B2
公开(公告)日：2013-10-29
申请号：US13223094
申请日：2011-08-31
CPC分类号： H04B1/10 , H03M1/0614 , H03M1/68
摘要： Distortion and aliasing reduction for digital to analog conversion. Synthesis of one or more distortion terms made based on a digital signal (e.g., one or more digital codewords) is performed in accordance with digital to analog conversion. The one or more distortion terms may correspond to aliased higher-order harmonics, distortion, nonlinearities, clipping, etc. Such distortion terms may be known a priori, such as based upon particular characteristics of a given device, operational history, etc. Alternatively, such distortion terms may be determined based upon operation of a device and/or based upon an analog signal generated from the analog to conversion process. For example, frequency selective measurements made based on an analog signal generated from the digital to analog conversion may be used for determination of and/or adaptation of the one or more distortion terms. One or more DACs may be employed within various architectures operative to perform digital to analog conversion.
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公开(公告)号：US08457584B2
公开(公告)日：2013-06-04
申请号：US11218596
申请日：2005-09-06
申请人： Bruce J. Currivan
发明人： Bruce J. Currivan
IPC分类号： H04B1/10
CPC分类号： H04N21/61 , H04B1/1018
摘要： The present invention is directed to systems and method for attenuating intermodulation interference. In particular, methods and systems to attenuate intermodulation interference contained within an aggregate signal having a transmitted signal that was transmitted over a communications channel having channel effects that produce the intermodulation interference are provided. The communications channel may be a cable television distribution network and the signal may be a cable television signal. A method is provided to predict when intermodulation interference will be large, so that actions within a receiver can be taken to reduce the impact of the interference and improve overall receiver performance.
摘要翻译： 本发明涉及用于衰减互调干扰的系统和方法。 特别地，提供了衰减包含在具有通过具有产生互调干扰的信道效应的通信信道的发送信号的聚合信号内的互调干扰的方法和系统。 通信信道可以是有线电视分配网络，并且该信号可以是有线电视信号。 提供了一种预测互调干扰何时较大的方法，从而可以采取接收机内的动作来减少干扰的影响并提高整体接收机性能。
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