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1.发明申请公开(公告)号：US20100180165A1
公开(公告)日：2010-07-15
申请号：US12708756
申请日：2010-02-19
IPC分类号： G06F11/00
CPC分类号： H04B1/69 , H04J13/0074
摘要： A system and method are used to provide uncorrelated code hopping in a communications system. A shift register receives data. The shift register is clocked to shift the data. A scaler performs a scaling operation on the data with a numerical value of active codes. A truncator truncates the scaled data to its seven most significant bits to produce a pseudo random hop number. A code matrix shifter circularly shifts the active codes in a code matrix based on the pseudo random hop number to produce a circularly shifted code. A transmitter transmits the circularly shifted code.
摘要翻译： 系统和方法用于在通信系统中提供不相关的跳码。 移位寄存器接收数据。 移位寄存器用于移位数据。 缩放器使用活动代码的数值对数据执行缩放操作。 截断器将缩放的数据截断为其七个最高有效位以产生伪随机跳数。 码矩阵移位器基于伪随机跳数循环移位代码矩阵中的活动代码，以产生循环移位代码。 发射机发送循环码。
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2.发明授权公开(公告)号：US07673192B2
公开(公告)日：2010-03-02
申请号：US11489538
申请日：2006-07-20
IPC分类号： H04J13/06
CPC分类号： H04B1/69 , H04J13/0074
摘要： A system and method are used to provide uncorrelated code hopping in a communications system. A multi-bit linear shift register receives data and clocks the data fifteen times. A word assembler receives the shifted data and outputs a fifteen bit word. A mixer mixes the fifteen bit word with an numerical value of active codes to generate a mixed signal. A divider divides the mixed signal to produce a divided signal. A truncator truncates the divided signal to its seven most significant bits to produce a pseudo random hop number. A code matrix shifter circularly shifts the active codes in a code matrix based on the pseudo random hop number to produce a circularly shifted code. A transmitter transmits the circularly shifted code matrix.
摘要翻译： 系统和方法用于在通信系统中提供不相关的跳码。 多位线性移位寄存器接收数据并对数据进行十五次计时。 字汇编器接收移位数据并输出十五位字。 混频器将十五位字与有效码的数值混合以产生混合信号。 分频器分割混合信号以产生分频信号。 截断器将分割的信号截断为其七个最高有效位以产生伪随机跳数。 码矩阵移位器基于伪随机跳数循环移位代码矩阵中的活动代码，以产生循环移位代码。 发射机发送循环移位码矩阵。
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3.发明授权公开(公告)号：US07941710B2
公开(公告)日：2011-05-10
申请号：US12708756
申请日：2010-02-19
IPC分类号： H04J13/06
CPC分类号： H04B1/69 , H04J13/0074
摘要： A system and method are used to provide uncorrelated code hopping in a communications system. A shift register receives data. The shift register is clocked to shift the data. A scaler performs a scaling operation on the data with a numerical value of active codes. A truncator truncates the scaled data to its seven most significant bits to produce a pseudo random hop number. A code matrix shifter circularly shifts the active codes in a code matrix based on the pseudo random hop number to produce a circularly shifted code. A transmitter transmits the circularly shifted code.
摘要翻译： 系统和方法用于在通信系统中提供不相关的跳码。 移位寄存器接收数据。 移位寄存器用于移位数据。 缩放器使用活动代码的数值对数据执行缩放操作。 截断器将缩放的数据截断为其七个最高有效位以产生伪随机跳数。 码矩阵移位器基于伪随机跳数循环移位代码矩阵中的活动代码，以产生循环移位代码。 发射机发送循环码。
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公开(公告)号：US07203227B1
公开(公告)日：2007-04-10
申请号：US10294048
申请日：2002-11-14
申请人： Bruce J. Currivan , Ravi Bhaskaran , Thomas J. Kolze , Kevin Lee Miller , Jeffrey S. Putnam , Fang Lu , Tak K. Lee , Thuji S. Lin , Loke Kun Tan , Gopal Triplicane Venkatesan , Hsin-An Liu , Jonathan S. Min , James P. Cavallo
发明人： Bruce J. Currivan , Ravi Bhaskaran , Thomas J. Kolze , Kevin Lee Miller , Jeffrey S. Putnam , Fang Lu , Tak K. Lee , Thuji S. Lin , Loke Kun Tan , Gopal Triplicane Venkatesan , Hsin-An Liu , Jonathan S. Min , James P. Cavallo
IPC分类号： H04B1/38
CPC分类号： H04L12/2801
摘要： All digital reference frequency locking. An all digital approach is provided for operation within one or more CMs within a cable modem communication system to lock the upstream of the one or more CMs to the downstream symbol clock provided from a CMTS. The locking of the CM's upstream may be performed using one of at least three different functions: (1) Locking the upstream symbol clock phase to the downstream symbol clock phase, (2) Locking the downstream symbol clock phase to the headend reference clock phase (typically 10.24 MHz or integer multiple thereof), and (3) Locking the upstream carrier frequency to the downstream symbol clock frequency. The all-digital techniques for supporting all digital reference frequency locking functionality provide high performance to support S-CDMA and other synchronous modulation techniques.
摘要翻译： 全数字参考频率锁定。 提供全数字方法以在电缆调制解调器通信系统内的一个或多个CM内操作，以将一个或多个CM的上游锁定到从CMTS提供的下游符号时钟。 CM的上游的锁定可以使用至少三种不同的功能中的一种执行：（1）将上游符号时钟相位锁定到下游符号时钟相位，（2）将下游符号时钟相位锁定到前端参考时钟相位 通常为10.24MHz或其整数倍），以及（3）将上游载波频率锁定到下游符号时钟频率。 用于支持所有数字参考频率锁定功能的全数字技术提供了高性能以支持S-CDMA和其他同步调制技术。
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5.发明授权公开(公告)号：US08891699B2
公开(公告)日：2014-11-18
申请号：US13428698
申请日：2012-03-23
IPC分类号： H03D1/04
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：US08279987B2
公开(公告)日：2012-10-02
申请号：US13026608
申请日：2011-02-14
申请人： Thomas J. Kolze , Bruce J. Currivan , Jonathan S. Min , Eric J. Ojard , James Chi Thi , Daniel H. Howard
发明人： Thomas J. Kolze , Bruce J. Currivan , Jonathan S. Min , Eric J. Ojard , James Chi Thi , Daniel H. Howard
IPC分类号： H04B1/10
CPC分类号： H04B1/1036 , H04B1/1027 , H04B1/123 , H04L1/0001 , H04L25/03006
摘要： A filter settings generation operation includes sampling a communication channel to produce a sampled signal. The sampled signal is spectrally characterized across a frequency band of interest to produce a spectral characterization of the sampled signal. This spectral characterization may not include a signal of interest. The spectral characterization is then modified to produce a modified spectral characterization. Filter settings are then generated based upon the modified spectral characterization. Finally, the communication channel is filtered using the filter settings when the signal of interest is present on the communication channel. In modifying the spectral characterization, pluralities of spectral characteristics of the spectral characterization are independently modified to produce the modified spectral characterization. Modifications to the spectral characterization may be performed in the frequency domain and/or the time domain. One particular spectral modification that is performed is raising of the noise floor of the spectral characterization to meet a budgeted signal-to-noise ratio. Other spectral modifications include modifying spectral components corresponding to an expected interfering signal. In modifying these spectral characterizations, spectral components corresponding to a plurality of expected interfering signals may be modified.
摘要翻译： 滤波器设置生成操作包括对通信信道进行采样以产生采样信号。 采样信号在感兴趣的频带上进行频谱表征，以产生采样信号的频谱表征。 该光谱特性可能不包括感兴趣的信号。 然后修改光谱表征以产生修改的光谱表征。 然后基于修改的光谱表征生成滤波器设置。 最后，当感兴趣的信号存在于通信信道上时，使用滤波器设置对通信信道进行滤波。 在修改光谱表征时，光谱特性的多个光谱特征被独立地修改以产生修改的光谱表征。 频谱表征的修改可以在频域和/或时域中执行。 执行的一个特定频谱修改是提高频谱表征的本底噪声以满足预算的信噪比。 其他频谱修改包括修改对应于预期干扰信号的频谱分量。 在修改这些频谱表征时，可以修改对应于多个预期干扰信号的频谱分量。
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公开(公告)号：US20120243527A1
公开(公告)日：2012-09-27
申请号：US13428357
申请日：2012-03-23
CPC分类号： H04L1/004 , H04L1/20 , H04L2001/0096
摘要： Upstream burst noise measurement and characterization. One or more communication devices is implemented to detect and measure burst noise event(s) within channel(s) associated with communication link(s) within communication system(s) or network(s). Detection and measurement of a burst noise event may be made during active communications on one or more other channels, and may be made during active communications on two channels respectively adjacent to the channel on which the burst noise event is being detected and measured. The channel on which the burst noise event is detected and measured may be an unused channel. The detection and measurement of the burst noise event may be made during a quiet time slot within one of the channels. Correlation (e.g., with respect time) may be determined with respect to different respective layers within a communication device (e.g., with respect to MAC and PHY layers).
摘要翻译： 上游突发噪声测量和表征。 实现一个或多个通信设备以检测和测量与通信系统或网络内的通信链路相关联的信道内的突发噪声事件。 突发噪声事件的检测和测量可以在一个或多个其它信道上的有效通信期间进行，并且可以在与在其上检测和测量突发噪声事件的信道相邻的两个信道上的有效通信期间进行。 检测和测量突发噪声事件的信道可以是未使用的信道。 突发噪声事件的检测和测量可以在一个信道内的安静时隙内进行。 相关性（例如，相对于时间）可以针对通信设备内的不同相应层（例如，相对于MAC层和PHY层）来确定。
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公开(公告)号：US07567638B2
公开(公告)日：2009-07-28
申请号：US11789764
申请日：2007-04-24
申请人： Thomas J. Kolze , Bruce J. Currivan , Jonathan S. Min , Eric J. Ojard , James Chi Thi , Daniel Howard
发明人： Thomas J. Kolze , Bruce J. Currivan , Jonathan S. Min , Eric J. Ojard , James Chi Thi , Daniel Howard
IPC分类号： H03D1/04
CPC分类号： H04B1/1036 , H04B1/1027 , H04B1/123 , H04L1/0001 , H04L25/03006
摘要： A filter settings generation operation includes sampling a communication channel to produce a sampled signal. The sampled signal is spectrally characterized across a frequency band of interest to produce a spectral characterization of the sampled signal. This spectral characterization may not include a signal of interest. The spectral characterization is then modified to produce a modified spectral characterization. Filter settings are then generated based upon the modified spectral characterization. Finally, the communication channel is filtered using the filter settings when the signal of interest is present on the communication channel. In modifying the spectral characterization, pluralities of spectral characteristics of the spectral characterization are independently modified to produce the modified spectral characterization. Modifications to the spectral characterization may be performed in the frequency domain and/or the time domain. One particular spectral modification that is performed is raising of the noise floor of the spectral characterization to meet a budgeted signal-to-noise ratio. Other spectral modifications include modifying spectral components corresponding to an expected interfering signal. In modifying these spectral characterizations, spectral components corresponding to a plurality of expected interfering signals may be modified.
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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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10.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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