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1. 发明申请

US20060041821A1 Short length LDPC (Low Density Parity Check) code and modulation adapted for high speed Ethernet applications 失效
标题翻译：适用于高速以太网应用的短长度LDPC（低密度奇偶校验）码和调制
公开(公告)号：US20060041821A1
公开(公告)日：2006-02-23
申请号：US11190657
申请日：2005-07-27
申请人： Ba-Zhong Shen , Kelly Cameron , Hau Tran , Scott Powell
发明人： Ba-Zhong Shen , Kelly Cameron , Hau Tran , Scott Powell
IPC分类号： H03M13/00
CPC分类号： H04L27/04 , H03M13/118 , H03M13/255 , H04L25/4917 , H04L27/3416
摘要： A short length LDPC (Low Density Parity Check) code and modulation adapted for high speed Ethernet applications. In some instances, the short length-LDPC code and modulation may be employed within the recommended practices currently being developed by the IEEE 802.3an (10GBASE-T) Task Force. The IEEE 802.3an (10GBASE-T) Task Force has been commissioned to develop and standardize communications protocol adapted particularly for Ethernet operation over 4 wire twisted pair cables. A new LDPC code, some possible embodiments of constellations and the corresponding mappings, as well as possible embodiments of various parity check matrices, H, of the LDPC code are presented herein to provide for better overall performance than other proposed LDPC codes existent in the art of high speed Ethernet applications. Moreover, this proposed LDPC code may be decoded using a communication device having much less complexity than required to decode other proposed LDPC codes existent in this technology space.
摘要翻译：适用于高速以太网应用的短长度LDPC（低密度奇偶校验）码和调制。在一些情况下，可以在IEEE 802.3an（10GBASE-T）工作组当前正在开发的推荐做法中采用短长度LDPC码和调制。 IEEE 802.3an（10GBASE-T）工作组已委托开发和标准化通信协议，特别适用于通过4线双绞线电缆进行以太网操作。本文中呈现了新的LDPC码，星座的一些可能的实施例和对应的映射以及LDPC码的各种奇偶校验矩阵H的可能实施例，以提供比本领域中存在的其它提出的LDPC码更好的总体性能的高速以太网应用。此外，该提出的LDPC码可以使用比在该技术空间中存在的其它提出的LDPC码要求更低的复杂度的通信设备进行解码。

2. 发明申请

US20060156179A1 Construction of LDPC (Low Density Parity Check) codes using GRS (Generalized Reed-Solomon) code 有权
公开(公告)号：US20060156179A1
公开(公告)日：2006-07-13
申请号：US11190333
申请日：2005-07-27
申请人： Ba-Zhong Shen , Scott Powell , Kelly Cameron , Hau Tran
发明人： Ba-Zhong Shen , Scott Powell , Kelly Cameron , Hau Tran
IPC分类号： H03M13/00
CPC分类号： H03M13/255 , H03M7/30 , H03M13/03 , H03M13/033 , H03M13/1102 , H03M13/15 , H03M13/1515
摘要： Construction of LDPC (Low Density Parity Check) codes using GRS (Generalized Reed-Solomon) code. A novel approach is presented by which a GRS code may be employed to generate a wide variety of types of LDPC codes. Such GRS based LDPC codes may be employed within various types of transceiver devices implemented within communication systems. This approach may be employed to generate GRS based LDPC codes particular designed for various application arenas. As one example, such a GRS based LDPC code may be specifically designed for use in communication systems that operate in accordance with any standards and/or recommended practices of the IEEE P802.3an (10GBASE-T) Task Force.

3. 发明申请

US20060107179A1 Amplifying magnitude metric of received signals during iterative decoding of LDPC (Low Density Parity Check) code and LDPC coded modulation 有权
标题翻译：在LDPC（低密度奇偶校验）码和LDPC编码调制的迭代解码期间，放大接收信号的幅度度量
公开(公告)号：US20060107179A1
公开(公告)日：2006-05-18
申请号：US11190334
申请日：2005-07-27
申请人： Ba-Zhong Shen , Kelly Cameron , Scott Powell , Hau Tran
发明人： Ba-Zhong Shen , Kelly Cameron , Scott Powell , Hau Tran
IPC分类号： H03M13/00
CPC分类号： H03M13/658 , H03M13/1111
摘要： Amplifying magnitude metric of received signals during iterative decoding of LDPC code and LDPC coded modulation. By appropriately selecting a metric coefficient value that is used to calculate the initial conditions when decoding LDPC coded signals, a significant reduction in BER may be achieved at certain SNRs. The appropriate selection of the metric coefficient value may be performed depending on the particular SNR at which a communication system is operating. By adjusting this metric coefficient value according to the given LDPC code, modulation, and noise variance, the overall performance of the decoding may be significantly improved. The convergence speed is slowed down so that the decoder will not go to the wrong codeword, and the moving range of the outputs of the decoder is restricted so that the output will not oscillate too much and will eventually move to the correct codeword.
摘要翻译：在LDPC码和LDPC编码调制的迭代解码期间放大接收信号的幅度度量。通过在解码LDPC编码信号时适当地选择用于计算初始条件的度量系数值，可以在某些SNR下实现BER的显着降低。可以根据通信系统正在操作的特定SNR来执行度量系数值的适当选择。通过根据给定的LDPC码，调制和噪声方差调整该度量系数值，可以显着提高解码的整体性能。收敛速度变慢，因此解码器不会进入错误的码字，解码器的输出的移动范围受到限制，使得输出不会振荡太多，最终会移动到正确的码字。

4. 发明申请

US20060045197A1 LDPC (Low Density Parity Check) coded 128 DSQ (Double Square QAM) constellation modulation and associated labeling 失效
公开(公告)号：US20060045197A1
公开(公告)日：2006-03-02
申请号：US11211210
申请日：2005-08-25
申请人： Gottfried Ungerboeck , Ba-Zhong Shen , Scott Powell , Kelly Cameron , Hau Tran
发明人： Gottfried Ungerboeck , Ba-Zhong Shen , Scott Powell , Kelly Cameron , Hau Tran
IPC分类号： H04L5/12
CPC分类号： H03M13/255 , H03M13/11 , H04L25/4975 , H04L27/3405 , H04L27/3427
摘要： LDPC (Low Density Parity Check) coded 128 DSQ (Double Square QAM) constellation modulation and its associated labeling. A novel means is introduced by which a constellation may be arranged and mapping in its symbols may be determined to provide for improved performance. One application area in which this may be employed is transmission over twisted pair (typically copper) cabling existent within data centers of various networks. The operation of the IEEE 802.3 Ethernet local area networks currently being used (as well as those currently under development) would benefit greatly by employing the various principles presented herein. When this novel approach of an LDPC coded 128 DSQ constellation modulation combined with TH (Tomlinson-Harashima) preceding is employed within a communication device at a transmitter end of a communication channel (i.e., in a transmitter and/or a transceiver), the overall operation of a communication system may improve significantly when compared to prior techniques.

5. 发明申请

US20060045213A1 Decoding error correcting codes transmitted through multiple wire twisted pair cables with uneven noise on the wires 有权
公开(公告)号：US20060045213A1
公开(公告)日：2006-03-02
申请号：US11172551
申请日：2005-06-30
申请人： Ba-Zhong Shen , Scott Powell , Kelly Cameron
发明人： Ba-Zhong Shen , Scott Powell , Kelly Cameron
IPC分类号： H04L27/06
CPC分类号： H04L1/0045 , H03M13/45 , H04L1/02 , H04L25/14 , H04L2001/0096
摘要： Decoding error correcting codes transmitted through multiple wire twisted pair cables with uneven noise on the wires. A novel approach is presented by which the metrics may be calculated for signals received over multi-wire (or alternatively referred to as multi-channel, and/or multi-path) communication channels to exploit an uneven distribution of noise among those wires for improved performance. In addition, this approach may also be performed in combination with employing an amplification factor to modify the metrics employed when performing ECC (Error Correcting Code) decoding. Moreover, when information is known concerning which 1 or more paths (e.g., wires) has an SNR that is different (e.g., lower in some cases) from the others, an even better adapted means of calculating the metrics associated with each of the paths (e.g., wires) may be employed to provide for improved performance with respect to iterative decoding processing of signals encoded using ECCs.

6. 发明申请

US20060093146A1 Two-stage block synchronization and scrambling 有权
标题翻译：两级块同步和加扰
公开(公告)号：US20060093146A1
公开(公告)日：2006-05-04
申请号：US11255698
申请日：2005-10-21
申请人： Gottfried Ungerboeck , Scott Powell , Ba-Zhong Shen
发明人： Gottfried Ungerboeck , Scott Powell , Ba-Zhong Shen
IPC分类号： H04L9/00
CPC分类号： H04L25/03866
摘要： A two-stage block synchronization and scrambling module includes a synchronization PRNG module, a scramble PRNG module, a summing module, and a storage module. The synchronization PRNG module is clocked once per N+1 bit PCS frame (N arbitrary) to produce a synchronization bit and a pseudo-random starting state for the scramble PRNG. The scramble PRNG module is clocked N times per PCS frame to produce a cipher stream starting with a pseudo-random state from the synchronization PRNG. The summing module is operably coupled to sum the cipher stream and a PCS frame payload to produce scrambled payload. The storage module is operably coupled to store the scrambled payload with the synchronization bit. Synchronization bits from successive frames are a running bit-serial representation of the synchronization PRNG state and are used by the receiver to synchronize with the transmit scrambler.
摘要翻译：两级块同步和加扰模块包括同步PRNG模块，加扰PRNG模块，求和模块和存储模块。每N + 1位PCS帧（N任意）为同步PRNG模块计时一次，以产生用于加扰PRNG的同步位和伪随机起始状态。加扰PRNG模块按照PCS帧为N次计时，以产生从同步PRNG开始的伪随机状态的密码流。求和模块可操作地耦合以对加密流和PCS帧有效载荷求和以产生加扰有效载荷。存储模块可操作地耦合以存储具有同步位的加扰有效载荷。来自连续帧的同步位是同步PRNG状态的运行位串行表示，并被接收机用于与发送扰频器同步。

7. 发明授权

US09080992B2 Adjustable variable resolution inspection systems and methods 有权
标题翻译：可调式可变分辨率检测系统及方法
公开(公告)号：US09080992B2
公开(公告)日：2015-07-14
申请号：US13754767
申请日：2013-01-30
申请人： Mark S. Olsson , Scott Powell , Roger Shaffer , Stephanie Bench , Ray Merewhether , David Cox , Eric Chapman
发明人： Mark S. Olsson , Scott Powell , Roger Shaffer , Stephanie Bench , Ray Merewhether , David Cox , Eric Chapman
IPC分类号： G01N21/954 , H04N5/225 , H04N5/335 , G03B37/00 , H04N5/345 , H04N5/232
CPC分类号： G01N21/954 , G03B37/005 , H04N5/2252 , H04N5/2259 , H04N5/232 , H04N5/345 , H04N2005/2255
摘要： Camera heads configured to provide digitally articulated images or video, at adjustable resolutions and/or offsets and orientations, to a camera control unit (CCU) or other electronic computing system for display, storage, and/or transmission to other systems are disclosed.
摘要翻译：公开了一种被配置为以可调节的分辨率和/或偏移和取向将数字关节式图像或视频提供给相机控制单元（CCU）或用于显示，存储和/或传输到其他系统的其他电子计算系统的相机头。

8. 发明授权

US09071328B2 Transceiver with automatic detection of unshielded twisted pair or shielded twisted pair cabling 有权
标题翻译：收发器具有自动检测非屏蔽双绞线或屏蔽双绞线布线
公开(公告)号：US09071328B2
公开(公告)日：2015-06-30
申请号：US13614725
申请日：2012-09-13
申请人： Scott Powell
发明人： Scott Powell
IPC分类号： H04B1/38 , H04B3/20 , H04B3/32 , H04L12/40
CPC分类号： H04B3/20 , H04B3/32 , H04L12/40032
摘要： Typical transceivers have multiple near-end and multiple far-end crosstalk cancellation filters. Crosstalk cancellation is one of the largest contributors to power dissipation in the DSP portion of high speed Ethernet transceivers. By detecting the cable type, a transceiver could automatically turn off its crosstalk cancellation filters when driving shielded twisted pair (STP) cables and substantially reduce the overall power dissipation in this configuration. Adaptive digital crosstalk cancellers automatically adjust the coefficients of a digital filter to match the coupling function between two channels. The impulse response of an optimal crosstalk cancellation filter can be used to determine a metric indicating the amount of coupling between the two channels. STP cables will have a much lower amount of coupling between wire-pairs than unshielded twisted pair cables.
摘要翻译：典型的收发器具有多个近端和多个远端串扰消除滤波器。串扰消除是高速以太网收发器DSP部分功耗最大的因素之一。通过检测电缆类型，收发器可以在驱动屏蔽双绞线（STP）电缆时自动关闭其串扰消除滤波器，并在此配置中大大降低总体功耗。自适应数字串扰消除器自动调整数字滤波器的系数以匹配两个通道之间的耦合功能。可以使用最佳串扰消除滤波器的脉冲响应来确定指示两个信道之间的耦合量的度量。 STP电缆与非屏蔽双绞线电缆之间的线对耦合数量要少得多。

9. 发明授权

US09008244B2 Method and system for a combined signal detection for physical layer communication devices 有权
公开(公告)号：US09008244B2
公开(公告)日：2015-04-14
申请号：US12536172
申请日：2009-08-05
申请人： Mehmet Tazebay , Scott Powell , Peiqing Wang , Bruce Conway , Sang Bui
发明人： Mehmet Tazebay , Scott Powell , Peiqing Wang , Bruce Conway , Sang Bui
IPC分类号： H03D1/04 , H04B3/23 , H04B1/7097 , H04B3/32
CPC分类号： H04B1/12 , H04B1/7097 , H04B3/23 , H04B3/32
摘要： Communication devices coupled via a communication link may comprise physical layer devices that may be operable to determine presence of a received signal and to mitigate noise in the signal prior to processing and/or validating the signal. Analog and/or digital signal processing may be utilized to process the signal and/or mitigate noise in the signal. Noise mitigation may comprise near-end crosstalk cancelling and/or echo cancelling and/or may utilize local transmit signal information. Subsequent to noise mitigation, samples of the noise reduced signal may be accumulated and/or an average signal strength and/or average signal power level may be determined. The average signal strength and/or average signal power level may be compared to one or more thresholds which may be configurable and/or programmable.

10. 发明授权

US08769082B2 Method and system for PHY initiated wake-up in energy efficient ethernet networks 有权
标题翻译：在节能以太网网络中PHY启动唤醒的方法和系统
公开(公告)号：US08769082B2
公开(公告)日：2014-07-01
申请号：US12508999
申请日：2009-07-24
申请人： Scott Powell , Peiqing Wang
发明人： Scott Powell , Peiqing Wang
IPC分类号： G06F15/173
CPC分类号： G06F1/3209 , H04L12/40039 , Y02D50/42
摘要： One or both link partners coupled via an Ethernet link may comprise a PHY device operable to initiate a wake-up interval. The PHY device may monitor parameters that may indicate Ethernet link status. Exemplary parameters may comprise a timer, communication performance metrics and/or configuration parameters. From a low power mode, the PHY device may generate a wake state idle symbol based on the monitoring and may communicate it to a local and/or a remote MAC. The local and/or remote MAC may establish a wake-up interval. The wake-up interval may comprise synchronization, circuit adaption and updating of communication parameters, which may enable control of noise cancellation functions and/or equalization functions. One or both of the link partners may transition to a low power mode after the wake-up interval and/or to an active state after the wake-up interval.
摘要翻译：通过以太网链路耦合的一个或两个链路伙伴可以包括可操作以启动唤醒间隔的PHY设备。 PHY设备可以监视可能指示以太网链路状态的参数。示例性参数可以包括定时器，通信性能度量和/或配置参数。从低功率模式，PHY设备可以基于监视产生唤醒状态空闲符号，并且可以将其传送到本地和/或远程MAC。本地和/或远程MAC可以建立唤醒间隔。唤醒间隔可以包括通信参数的同步，电路适配和更新，其可以实现噪声消除功能和/或均衡功能的控制。一个或两个链路伙伴可以在唤醒间隔之后转换到低功率模式和/或在唤醒间隔之后转换到活动状态。

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