公开(公告)号：US20050031064A1

公开(公告)日：2005-02-10

申请号：US10940136

申请日：2004-09-14

申请人： Thomas Kolze ,  Bruce Currivan ,  Jonathan Min ,  Eric Ojard ,  James Thi ,  Daniel Howard

发明人： Thomas Kolze ,  Bruce Currivan ,  Jonathan Min ,  Eric Ojard ,  James Thi ,  Daniel Howard

IPC分类号： H04B1/10 ,  H04B1/12 ,  H04L1/00 ,  H04L25/03

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。

公开(公告)号：US08498365B2

公开(公告)日：2013-07-30

申请号：US13306400

申请日：2011-11-29

申请人： Thomas Kolze ,  Bruce Currivan ,  Jonathan Min

发明人： Thomas Kolze ,  Bruce Currivan ,  Jonathan Min

IPC分类号： H04L27/06

CPC分类号： H04L1/005 ,  H04B1/71 ,  H04B1/7102 ,  H04B1/7103 ,  H04B1/71055 ,  H04B1/71072 ,  H04B2201/709709 ,  H04L1/0009 ,  H04L1/0045 ,  H04L1/0057 ,  H04N21/6168

摘要： Systems and methods are disclosed for detecting temporary high level impairments, such as noise or interference, for example, in a communications channel, and subsequently, mitigating the deleterious effects of the dynamic impairments. In one embodiment, the method not only performs dynamic characterization of channel fidelity against impairments, but also uses this dynamic characterization of the channel fidelity to adapt the receiver processing and to affect an improvement in the performance of the receiver. For example, in this embodiment, the method increases the accuracy of the estimation of the transmitted information, or similarly, increases the probability of making the correct estimates of the transmitted information, even in the presence of temporary severe levels of impairment. The channel fidelity history may also be stored and catalogued for use in, for example, future optimization of the transmit waveform.

公开(公告)号：US08457040B2

公开(公告)日：2013-06-04

申请号：US10809685

申请日：2004-03-26

申请人： Thomas Kolze ,  Bruce Currivan ,  Niki Pantelias

发明人： Thomas Kolze ,  Bruce Currivan ,  Niki Pantelias

IPC分类号： H04B7/212

CPC分类号： H04L7/048 ,  H04J3/0638 ,  H04J3/0688 ,  H04L1/004

摘要： A central entity and/or a remote device in a communication system are designed to address the problem of maintaining upstream synchronization in the remote device after loss of the downstream signal. One issue of particular importance is maintaining upstream transmissions from the remote device in an S-CDMA (or perhaps S-TDMA) mode that do not degrade performance of the communication system via poor upstream timing or a need for re-ranging. By providing novel functionality at the central entity for synchronizing first and second downstream signals and/or by providing novel functionality at the remote device for determining a symbol clock offset between a first terminated downstream signal and a second re-acquired downstream signal, embodiments of the present invention facilitate maintenance of synchronization through the loss of the downstream signal, thereby minimizing the need for re-ranging and avoiding poorly timed upstream bursts.

摘要翻译： 通信系统中的中央实体和/或远程设备被设计为解决在丢失下行信号之后维护远程设备中的上行同步的问题。 一个特别重要的问题是在S-CDMA（或可能的S-TDMA）模式中维护来自远程设备的上行传输，其不会通过差的上行时序或重新测距的需要来降低通信系统的性能。 通过在中央实体提供用于同步第一和第二下游信号的新颖功能和/或通过在远程设备处提供新颖的功能来确定第一终止的下行信号和第二重新获得的下行信号之间的符号时钟偏移， 本发明便于通过丢失下行信号来维持同步，从而最小化对重新测距的需要，并避免不良定时的上行脉冲串。

公开(公告)号：US08437406B2

公开(公告)日：2013-05-07

申请号：US12269865

申请日：2008-11-12

申请人： Thomas Kolze ,  Robbert van der Wal ,  Bruce Currivan

发明人： Thomas Kolze ,  Robbert van der Wal ,  Bruce Currivan

IPC分类号： H04N7/12 ,  H04N11/02 ,  H04J3/24 ,  H03M13/00 ,  A61F2/48

CPC分类号： H04N21/63 ,  H04H20/69 ,  H04H20/78

摘要： Methods and systems for DVB-C2 are disclosed and may include receiving data encoded utilizing variable encoding, variable modulation and outer codes via a physical layer matched to a desired quality of service. An error probability may be determined for said received data and retransmission of portions of said data with error probability above an error threshold may be requested. The variable modulation may include single carrier modulation, orthogonal frequency division modulation, synchronous code division multiple access, and/or from 256 QAM to 2048 QAM or greater. The variable encoding may include forward error correction code, which may include low density parity check code.

摘要翻译： 公开了DVB-C2的方法和系统，并且可以包括通过与期望的服务质量匹配的物理层来接收利用可变编码，可变调制和外部码编码的数据。 可以针对所述接收的数据确定错误概率，并且可以请求误差概率高于误差阈值的所述数据的部分的重传。 可变调制可以包括单载波调制，正交频分调制，同步码分多址，和/或从256QAM到2048QAM或更大。 可变编码可以包括前向纠错码，其可以包括低密度奇偶校验码。

公开(公告)号：US20100046601A1

公开(公告)日：2010-02-25

申请号：US12606751

申请日：2009-10-27

申请人： Afshin Momtaz ,  Mario Caresosa ,  David Chung ,  Davide Tonietto ,  Guangming Yin ,  Bruce Currivan ,  Thomas Kolze ,  Ichiro Fujimori

发明人： Afshin Momtaz ,  Mario Caresosa ,  David Chung ,  Davide Tonietto ,  Guangming Yin ,  Bruce Currivan ,  Thomas Kolze ,  Ichiro Fujimori

IPC分类号： H03K5/159

CPC分类号： H04L7/033 ,  H03G3/3084 ,  H03L7/091 ,  H04L25/03057 ,  H04L2025/03375 ,  H04L2025/03617

摘要： Various example embodiments are disclosed. According to an example embodiment, an apparatus may include a continuous time filter, a decision feedback equalizer, a clock and data recovery circuit, and an adaptation circuit. The adaptation circuit may be configured to adapt equalization according to at least one dithering algorithm by adjusting a delay adjust signal based on a mean square error of equalized data signals.

摘要翻译： 公开了各种示例性实施例。 根据示例实施例，设备可以包括连续时间滤波器，判决反馈均衡器，时钟和数据恢复电路以及适配电路。 适配电路可以被配置为通过基于均衡数据信号的均方误差调整延迟调整信号来根据至少一个抖动算法来适应均衡。

公开(公告)号：US07623600B2

公开(公告)日：2009-11-24

申请号：US10880959

申请日：2004-06-30

申请人： Afshin Momtaz ,  Mario Caresosa ,  David Chung ,  Davide Tonietto ,  Guangming Yin ,  Bruce Currivan ,  Thomas Kolze ,  Ichiro Fujimori

发明人： Afshin Momtaz ,  Mario Caresosa ,  David Chung ,  Davide Tonietto ,  Guangming Yin ,  Bruce Currivan ,  Thomas Kolze ,  Ichiro Fujimori

IPC分类号： H04L27/08

CPC分类号： H04L7/033 ,  H03G3/3084 ,  H03L7/091 ,  H04L25/03057 ,  H04L2025/03375 ,  H04L2025/03617

摘要： Equalization is provided in a high speed communication receiver that includes in various aspects an automatic gain control input stage, a decision feedback equalizer, a clock and data recovery circuit and equalization control circuits. The automatic gain control stage may include a continuous time filter with an adjustable bandwidth. A threshold adjust signal may be applied to the output of the automatic gain control stage. The equalization control circuits may be implemented in the digital domain and operate at a lower clock speed than the data path.

摘要翻译： 在高速通信接收机中提供均衡，其包括各种方面的自动增益控制输入级，判决反馈均衡器，时钟和数据恢复电路以及均衡控制电路。 自动增益控制级可以包括具有可调节带宽的连续时间滤波器。 阈值调整信号可以应用于自动增益控制级的输出。 均衡控制电路可以在数字域中实现并且以比数据路径更低的时钟速度工作。

公开(公告)号：US20070115349A1

公开(公告)日：2007-05-24

申请号：US11266442

申请日：2005-11-03

申请人： Bruce Currivan ,  Xuemin Chen

发明人： Bruce Currivan ,  Xuemin Chen

IPC分类号： H04N7/14

CPC分类号： H04N7/141

摘要： Herein described is a system and method that tracks the face of a person engaged in a videophone conversation. In addition to performing facial tracking, the invention provides stabilization of facial images that are transmitted during the videophone conversation. The face is tracked by employing one or more algorithms that correlate videophone captured facial images against a stored facial image. The face may be better identified by way of employing one or more voice recognition algorithms. The one or more voice recognition algorithms may correlate utterances of the person engaged in a conversation to one or more stored utterances. The identified utterances are subsequently mapped to a stored facial image. In a representative embodiment, the system used for performing facial tracking and image stabilization comprises an image sensor, a lens, an actuator, and a controller/processor.

摘要翻译： 这里描述了跟踪参与可视电话会话的人的面部的系统和方法。 除了执行面部跟踪之外，本发明提供了在可视电话会话期间传送的面部图像的稳定性。 通过采用将可视电话捕获的面部图像与存储的面部图像相关联的一种或多种算法来跟踪面部。 可以通过采用一种或多种语音识别算法来更好地识别脸部。 一个或多个语音识别算法可以将从事对话的人的话语与一个或多个存储的话语相关联。 所识别的话语随后映射到存储的面部图像。 在代表性的实施例中，用于执行面部跟踪和图像稳定的系统包括图像传感器，透镜，致动器和控制器/处理器。

公开(公告)号：US20060274778A1

公开(公告)日：2006-12-07

申请号：US11489525

申请日：2006-07-20

申请人： Bruce Currivan ,  Jonathan Min ,  Fang Lu

发明人： Bruce Currivan ,  Jonathan Min ,  Fang Lu

IPC分类号： H04L12/413

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.

公开(公告)号：US20060056461A1

公开(公告)日：2006-03-16

申请号：US11061147

申请日：2005-02-18

申请人： Bruce Currivan ,  Alexander MacInnis ,  Thomas Kolze ,  Richard Prodan

发明人： Bruce Currivan ,  Alexander MacInnis ,  Thomas Kolze ,  Richard Prodan

IPC分类号： H04J3/06

CPC分类号： H04J3/0682

摘要： A distributed cable modem termination system of the present invention includes a downstream transmitter hub, an upstream receiver hub, and a head end that communicatively couples to the downstream transmitter hub and to the upstream receiver hub via a packet data network. The head end and the downstream transmitter hub are operable to synchronize a clock of the downstream transmitter hub with a clock of the head end. Further, the upstream receiver hub and the downstream transmitter hub are operable to synchronize a clock of the upstream receiver hub with the clock of the downstream transmitter hub. Clock synchronization between the upstream receiver hub and the downstream transmitter hub are performed using ranging operations supported by at least one cable modem communicatively coupled to both the upstream receiver hub and the downstream transmitter hub via cable modem network plant.

摘要翻译： 本发明的分布式电缆调制解调器终端系统包括下行发射机集线器，上游接收集线器和头端，其通过分组数据网络通信耦合到下游发射机集线器和上游接收集线器。 头端和下游发射器集线器可操作以使下游发射器集线器的时钟与头端的时钟同步。 此外，上游接收器集线器和下游发射器集线器可操作以将上游接收器集线器的时钟与下游发射器集线器的时钟同步。 上游接收器集线器和下游发射器集线器之间的时钟同步使用通过电缆调制解调器网络设备通信地耦合到上游接收器集线器和下游发射机集线器的至少一个电缆调制解调器支持的测距操作来执行。

公开(公告)号：US20060056460A1

公开(公告)日：2006-03-16

申请号：US11031568

申请日：2005-01-06

申请人： Bruce Currivan

发明人： Bruce Currivan

IPC分类号： H04J3/06

CPC分类号： H04J3/0682

摘要： A distributed CMTS includes a head end, a downstream transmitter hub, and an upstream receiver hub. The head end transmits data packets to the downstream transmitter via a coupling packet data network. Each data packet is marked with a “measured delay” Quality of Service (QOS) and includes a time stamp that is based upon a clock of the head end and a delay tag. The downstream transmitter hub receives the plurality of data, adjusts the time stamps based upon the delay tags, smoothes the time stamps of the plurality of data packets and, based upon the smoothed time stamps, synchronizes its clock with the clock of the head end. The downstream transmitter hub then synchronizes a clock of the upstream receiver hub with the clock of the downstream transmitter hub. The upstream receiver hub may synchronize its clock to the clock of the head end using this technique.