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公开(公告)号：US08437387B2
公开(公告)日：2013-05-07
申请号：US13439197
申请日：2012-04-04
申请人： Bruce J. Currivan , Loke Kun Tan , Thomas Joseph Kolze , Hanli Zou , Lin He
发明人： Bruce J. Currivan , Loke Kun Tan , Thomas Joseph Kolze , Hanli Zou , Lin He
IPC分类号： H03H7/30
CPC分类号： H04L25/03057 , H04L27/0014 , H04L2027/003 , H04L2027/0038 , H04L2027/0053
摘要： An apparatus is disclosed to compensate for non-linear effects resulting from the transmitter, the receiver, and/or the communication channel in a communication system. A receiver of the communication system contains an image cancellation module that compensates for images generated during the modulation and/or demodulation process. The image cancellation module includes a fine carrier correction loop to correct for frequency offsets between the transmitter and receiver. The image cancellation module includes a coarse acquisition mode and a decision directed mode. The decision directed mode allows for a larger signal-to-noise ratio for the receiver when compared against the coarse acquisition mode.
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62.发明授权Cancellation of burst noise in a communication system with application to S-CDMA 有权在应用于S-CDMA的通信系统中消除突发噪声公开(公告)号：US08411769B2
公开(公告)日：2013-04-02
申请号：US12651945
申请日：2010-01-04
CPC分类号： H04B7/216 , H04B1/71 , H04B1/7107 , H04J13/0003 , H04J13/16 , H04L25/03038 , H04L25/03343 , H04L25/49 , H04L27/3405 , H04L2025/03375 , H04L2025/03477
摘要： A communication system performs burst noise cancellation. A transmitter produces and transmits a spread signal that comprises at least one known-value symbol spread by a plurality of non data-carrying orthogonal codes and data symbols spread by at least one data-carrying orthogonal code. The transmitter transmits the spread signal across a communication link that introduces burst noise. A burst noise detector determines burst noise affected chips of the orthogonal codes. A weight computation functional block calculates a plurality of complex-valued combining weights based upon the burst noise affected chips. A vector de-spreader and a linear combiner operate in combination to use the plurality of non data-carrying orthogonal codes, the at least one data-carrying orthogonal code, and the plurality of complex-valued combining weights to de-spread the received spread signal to produce the data symbols with the burst noise substantially removed.
摘要翻译： 通信系统执行突发噪声消除。 发射机产生并发射扩展信号，该扩展信号包括由多个非数据携带正交码扩展的至少一个已知值符号和由至少一个携带数据的正交码扩展的数据符号。 发射机通过引入突发噪声的通信链路发送扩展信号。 突发噪声检测器确定正交码的突发噪声影响码片。 权重计算功能块基于突发噪声影响的码片计算多个复值组合权重。 向量解扩器和线性组合器组合操作以使用多个非数据携带正交码，所述至少一个数据携带正交码和多个复值组合权重来对接收到的扩展进行解扩展 信号以产生具有基本去除的突发噪声的数据符号。
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63.发明授权公开(公告)号：US08301967B2
公开(公告)日：2012-10-30
申请号：US12843558
申请日：2010-07-26
IPC分类号： G06F11/00
CPC分类号： H04N21/437 , H03M13/29 , H03M13/2957 , H03M13/2966 , H03M13/6511 , H04L12/2801 , H04N7/17309
摘要： A method of transmitting data in a cable modem system includes the steps of encoding the data using forward error correction. The data is then encoded with Turbo encoding. The data is then sent to a modulation scheme. The data is then transmitted over a cable channel. The data is then demodulated. The data is then decoded using a Turbo decoder. An inverse of the forward error correction is then applied to the data.
摘要翻译： 在电缆调制解调器系统中发送数据的方法包括使用前向纠错对数据进行编码的步骤。 然后使用Turbo编码对数据进行编码。 然后将数据发送到调制方案。 然后通过有线信道传输数据。 然后解调数据。 然后使用Turbo解码器对数据进行解码。 然后将前向纠错的逆向应用于数据。
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64.发明申请公开(公告)号：US20120243865A1
公开(公告)日：2012-09-27
申请号：US13428270
申请日：2012-03-23
申请人： Thomas J. Kolze , Bruce J. Currivan
发明人： Thomas J. Kolze , Bruce J. Currivan
IPC分类号： H04B10/08
CPC分类号： H04L1/004 , H04L1/20 , H04L2001/0096
摘要： Detection and characterization of laser clipping within communication devices. Identification of one or more harmonics associated with a fundamental frequency by which signaling is effectuated within the communication system for laser clipping identification. Appropriate spectral signal analysis is made to identify the presence of characteristic(s) (e.g., energy, amplitude, phase, and/or other characteristic(s)), if any, at one or more harmonic frequencies within a received signal. Appropriate time correlation is performed to distinguish whether or not characteristic(s) associated with at one or more of these harmonic bands is a result of laser clipping or from some other source (e.g., such as other signals within a communication system that happened to reside at those respective harmonic bands). Such appropriate identified correlation between characteristic(s) corresponding to a fundamental frequency band of the communication signal and characteristic(s) corresponding to one or more harmonics (e.g., of that fundamental frequency band) indicates laser clipping.
摘要翻译： 通信设备内激光剪切的检测和表征。 识别与用于激光剪切识别的通信系统内实现信令的基频有关的一个或多个谐波。 进行适当的频谱信号分析以识别在接收信号内的一个或多个谐波频率处的特性（例如，能量，幅度，相位和/或其他特性）的存在（如果有的话）。 执行适当的时间相关性以区分与这些谐波频带中的一个或多个相关联的特征是否是激光削波的结果，还是来自某个其他源（例如，诸如恰好存在的通信系统内的其它信号） 在那些相应的谐波频带）。 对应于通信信号的基本频带的特性与对应于一个或多个谐波（例如该基本频带）的特性之间的这种适当的识别的相关性指示激光限幅。
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65.发明申请公开(公告)号：US20120243648A1
公开(公告)日：2012-09-27
申请号：US13428698
申请日：2012-03-23
IPC分类号： H04B1/10
CPC分类号： H04L25/03159 , H04L25/03878
摘要： Characterization and assessment of communication channel average group delay variation. A signal having repeated signal components therein is received by a communication device, and that signal undergoes appropriate processing to determine respective amplitude and phase of a number of frequency bins. The phase difference from bin to bin (including respecting unwrapping, and proper normalization) is used to determine the group delay of a communication channel, or portion thereof, as a function of frequency. Multiple respective group delay measurements may be averaged to generate a wideband group delay of the communication channel as a function of frequency. Overlap between different respective band-edge portions of the communication channel may assist in generating a seamless continuous wideband spectrum estimation for use in determining the wideband group delay of the communication channel.
摘要翻译： 通信信道平均群延迟变化的特征和评估。 其中具有重复信号分量的信号由通信设备接收，并且该信号经过适当的处理以确定多个频率仓的相应振幅和相位。 使用从bin到bin的相位差（包括关于展开和适当的归一化）来确定作为频率的函数的通信信道或其部分的组延迟。 多个相应的组延迟测量可以被平均以产生作为频率的函数的通信信道的宽带组延迟。 通信信道的不同相应带边部分之间的重叠可以有助于产生用于确定通信信道的宽带群延迟的无缝连续宽带频谱估计。
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公开(公告)号：US20120235841A1
公开(公告)日：2012-09-20
申请号：US13228301
申请日：2011-09-08
申请人： Ramon Alejandro Gomez , Loke Kun Tan , Bruce J. Currivan , Steven T. Jaffe , Thomas Joseph Kolze , Lin He
发明人： Ramon Alejandro Gomez , Loke Kun Tan , Bruce J. Currivan , Steven T. Jaffe , Thomas Joseph Kolze , Lin He
IPC分类号： H03M1/06
CPC分类号： H03M1/06 , H03M1/00 , H03M1/0695 , H03M1/1061 , H03M1/12 , H03M1/1215
摘要： A method and apparatus is disclosed to compensate for impairments within a data converter such that its output is a more accurate representation of its input. The data converter includes a main data converter, a reference data converter, and a correction module. The main data converter may be characterized as having the impairments. As a result, the output of the main data converter is not the most accurate representation of its input. The reference data converter is designed such that the impairments are not present. The correction module estimates the impairments present within the main data converter using its output and the reference data converter to generate corrections coefficients. The correction module adjusts the output of the main data converter using the corrections coefficients to improve the performance of the data converter.
摘要翻译： 公开了一种用于补偿数据转换器内的损伤的方法和装置，使得其输出是其输入的更准确的表示。 数据转换器包括主数据转换器，参考数据转换器和校正模块。 主数据转换器可以被表征为具有损伤。 因此，主数据转换器的输出不是其输入的最准确的表示。 参考数据转换器被设计成不存在损伤。 校正模块使用其输出和参考数据转换器来估计存在于主数据转换器内的损伤以产生校正系数。 校正模块使用校正系数调整主数据转换器的输出，以提高数据转换器的性能。
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67.发明申请Linear distortion and interference estimation using decision feedback equalizer coefficients 有权使用判决反馈均衡器系数的线性失真和干扰估计公开(公告)号：US20120230383A1
公开(公告)日：2012-09-13
申请号：US13406777
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： Linear distortion and interference estimation using decision feedback equalizer coefficients. Processing of different respective groups of equalizer coefficients may be made to determine the residual frequency response of an equalizer and/or device in which the equalizer is implemented. Such an equalizer may be in woman within any of a number of respective communication devices including those operative within satellite, wireless, wired, fiber-optic, and/or mobile communication systems. A first group of equalizer coefficients corresponds to certain filtering characteristics of the equalizer and/or device in which the equalizer is implemented. The equalizer is implemented to process a signal to generate a second group of equalizer coefficients. Processing and/or analysis of the first group of equalizer coefficients and the second group of equalizer coefficients will generate a third group of equalizer coefficients corresponding to the residual frequency response of the equalizer and/or device in which the equalizer is implemented.
摘要翻译： 使用判决反馈均衡器系数的线性失真和干扰估计。 可以对不同的各组均衡器系数进行处理，以确定实现均衡器的均衡器和/或设备的残余频率响应。 这种均衡器可以在多个相应通信设备中的任何一个内的女性中，包括在卫星，无线，有线，光纤和/或移动通信系统中可操作的通信设备。 均衡器系数的第一组对应于实现均衡器的均衡器和/或器件的某些滤波特性。 实现均衡器来处理信号以产生第二组均衡器系数。 第一组均衡器系数和第二组均衡器系数的处理和/或分析将产生对应于实现均衡器的均衡器和/或器件的残余频率响应的第三组均衡器系数。
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公开(公告)号：US20120183082A1
公开(公告)日：2012-07-19
申请号：US13223094
申请日：2011-08-31
IPC分类号： H03M1/00
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：US20120183031A1
公开(公告)日：2012-07-19
申请号：US13223124
申请日：2011-08-31
IPC分类号： H04B17/00
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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70.发明申请公开(公告)号：US20120182165A1
公开(公告)日：2012-07-19
申请号：US13349260
申请日：2012-01-12
CPC分类号： H04B1/10 , H03M1/0614 , H03M1/68
摘要： Digital to analog converter (DAC) with ternary or tri-state current source. A DAC including a number of ternary or tri-state devices operates based upon codewords provided thereto. Generally, each respective codeword bit directs operation of one of the respective ternary or tri-state devices within the DAC. Each ternary or tri-state device operates in at least three respective operational states (e.g., based upon the respective values of +1, −1, or 0 being provided thereto). In a current source implementation, each respective current source is implemented to deliver current, draw current, or neither delivered or draw current. In a voltage source implementation, each respective voltage source is implemented to provide a positive voltage, a negative voltage, or provide no voltage. A DAC coding table may be designed based upon characterization of codewords provided to one or more DACs (e.g., based upon a distribution, a probability density function (PDF), etc. of such codewords).
摘要翻译： 具有三态或三态电流源的数模转换器（DAC）。 包括多个三态或三态设备的DAC基于提供给它的码字来操作。 通常，每个相应的码字比特指示DAC内的相应三态或三态设备之一的操作。 每个三态或三态设备以至少三个相应的操作状态（例如，基于向其提供+1，-1或0的相应值）操作。 在当前的源实现中，实现每个相应的电流源以传递电流，绘制电流，或者不传送或绘制电流。 在电压源实现中，实施每个相应的电压源以提供正电压，负电压或不提供电压。 可以基于提供给一个或多个DAC（例如，基于分布，这种码字的概率密度函数（PDF）等）的码字的表征来设计DAC编码表。
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