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公开(公告)号：US20170310361A1
公开(公告)日：2017-10-26
申请号：US15372271
申请日：2016-12-07
Applicant: CISCO TECHNOLOGY, INC.
Inventor： Hang Jin
CPC classification number: H04B3/46 , G01R31/3181 , G01R31/31937 , H04B3/142 , H04B3/493 , H04B3/52 , H04L5/0005 , H04L27/2647 , H04L41/0631 , H04L41/0677 , H04L41/0686 , H04L41/147 , H04L43/10 , H04L43/16 , H04L67/1097 , H04L2012/6421 , H04Q2213/13012
Abstract: An example method for radio frequency (RF) signal fault signature isolation in cable network environments is provided and includes searching in phase domain for an echo in a channel response characterizing a channel in a cable network, the channel facilitating communication of a multi-tone signal in the cable network; identifying a phase in which the echo is found; calculating a tap amplitude corresponding to the identified phase, the calculated tap amplitude being indicative of group delay in the channel; correcting for the group delay in the multi-tone signal, for example, by subtracting the calculated tap amplitude from the multi-tone signal; and identifying a fault signature when amplitude of the corrected signal is greater than a threshold and the identified fault signature triggers operational maintenance of the cable network.
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公开(公告)号：US09735814B1
公开(公告)日：2017-08-15
申请号：US15352438
申请日：2016-11-15
Applicant: CISCO TECHNOLOGY, INC.
Inventor： Hang Jin , John T. Chapman
CPC classification number: H04B1/0475 , H03F1/3247 , H03F1/3258 , H03F1/56 , H03F3/189 , H03F3/245 , H03F2200/222 , H03F2200/387 , H04B2001/0425
Abstract: An example method for facilitating a high power efficient amplifier through digital pre-distortion (DPD) in cable network environments is provided and includes receiving a first signal and a second signal at a DPD coefficient finder in an amplifier module of a cable modem, the second signal including transformations of the first signal from distortions due to channel effects and amplifier nonlinearity, synchronizing the first signal and the second signal, removing the channel effects, computing a first vector representing an inverse of the nonlinearity of the amplifier, computing a second vector representing an inverse of certain channel effects and providing DPD coefficients to a DPD actuator, the DPD coefficients including the first vector and the second vector, the DPD actuator predistorting an input signal to the amplifier module with the DPD coefficients, such that an output signal from the amplifier module retains linearity relative to the input signal.
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公开(公告)号：US09712193B1
公开(公告)日：2017-07-18
申请号：US15247580
申请日：2016-08-25
Applicant: CISCO TECHNOLOGY, INC.
Inventor： Hang Jin
CPC classification number: H04B1/0475 , H03F1/3247 , H03F1/3258 , H03F1/56 , H03F3/189 , H03F3/245 , H03F2200/222 , H03F2200/387 , H04B2001/0425
Abstract: An example method for facilitating a high power efficient amplifier through digital pre-distortion (DPD) in cable network environments is provided and includes receiving a first signal and a second signal at a DPD coefficient finder in an amplifier module, the second signal including transformations of the first signal from distortions due to channel effects and amplifier nonlinearity, synchronizing the first signal and the second signal, thereby removing the channel effects, computing a first vector representing an inverse of the nonlinearity of the amplifier, computing a second vector representing an inverse of some of the channel effects and providing DPD coefficients to a DPD actuator in the amplifier module, the DPD coefficients including the first vector and the second vector, the DPD actuator predistorting an input signal to the amplifier module with the DPD coefficients, such that an output signal from the amplifier module retains linearity relative to the input signal.
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公开(公告)号：US20170019146A1
公开(公告)日：2017-01-19
申请号：US15052499
申请日：2016-02-24
Applicant: CISCO TECHNOLOGY, INC.
Inventor： Hang Jin , John T. Chapman
CPC classification number: H04B3/32 , H04B1/0475 , H04B1/10 , H04B3/20 , H04B3/487
Abstract: An example method for interference suppression in full duplex cable network environments is provided and includes providing a baseband (BB) reference signal on a first pathway to a signal processor, converting the BB reference signal to a first radio frequency (RF) signal, transmitting the first RF signal on the first pathway, the first RF signal being reflected back on a second pathway, receiving a second RF signal on the second pathway, the second RF signal including interferences from the reflections, generating an RF reference signal based on signals on the first pathway, providing the RF reference signal to the signal processor, providing the second RF signal to the signal processor, and reducing, by the signal processor, interferences in the second RF signal from reflections of the first RF signal based on the BB reference signal and the RF reference signal.
Abstract translation: 提供了一种用于全双工有线网络环境中的干扰抑制的示例方法，包括在信号处理器的第一路径上提供基带（BB）参考信号，将BB参考信号转换为第一射频（RF）信号， 第一RF信号在第一路径上反射，第一RF信号被反射回第二路径，在第二路径上接收第二RF信号，第二RF信号包括来自反射的干扰，基于信号产生RF参考信号 第一路径，将RF参考信号提供给信号处理器，向信号处理器提供第二RF信号，并且由信号处理器减少基于BB参考信号的第一RF信号的反射对第二RF信号的干扰 和RF参考信号。
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公开(公告)号：US09313070B2
公开(公告)日：2016-04-12
申请号：US14155859
申请日：2014-01-15
Applicant: Cisco Technology, Inc.
Inventor： Hang Jin
IPC: H04L27/26 , H04B17/345 , H04L5/00
CPC classification number: H04L27/2647 , H04B17/345 , H04L5/0048
Abstract: Techniques are presented herein for detecting burst noise in a received orthogonal frequency division multiplex (OFDM) transmission. An OFDM transmission is received that includes pilots transmitted at different instances of time but on the same subcarrier during a predetermined time interval such that there are a plurality of different pairs of pilots that are on the same subcarriers during the predetermined time interval. For each possible pair of pilots, an equalized pilot is generated using received values for first and second pilots of the pair. A signal-to-noise ratio is computed for each equalized pilot. A determination is made as to which pilots, if any, are affected by burst noise by comparing the signal-to-noise ratio among the plurality of equalized pilots. Pilots determined to be affected by burst noise are removed from a channel response computation.
Abstract translation: 这里提供了用于在接收的正交频分复用（OFDM）传输中检测突发噪声的技术。 接收OFDM传输，该OFDM传输包括在预定时间间隔期间在不同时间但在相同子载波上发射的导频，使得在预定时间间隔期间存在多个不同的导频对在相同子载波上。 对于每个可能的导频对，使用对中的第一和第二导频的接收值来生成均衡导频。 为每个均衡的导频计算信噪比。 通过比较多个均衡飞行员之间的信噪比，确定哪个导频（如果有的话）受到突发噪声的影响。 确定受突发噪声影响的飞行员从通道响应计算中移除。
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Patent Agency Ranking
86.发明授权Encoding techniques using multiple coding strengths within a single LDPC code word 有权在单个LDPC码字内使用多个编码强度的编码技术公开(公告)号：US09172400B2
公开(公告)日：2015-10-27
申请号：US13904094
申请日：2013-05-29
Applicant: Cisco Technology, Inc.
Inventor： Hang Jin
CPC classification number: H03M13/1148 , H03M13/255 , H03M13/356 , H04L1/0041 , H04L1/0058 , H04L1/007
Abstract: Techniques are presented herein to encode information bits. The information bits are partitioned into at least two groups based on inherent reliability and immunity to channel impairments of the respective bits. Each of the groups of information bits is encoded with a different coding strength. The resulting code word may be stored in a storage media or transmitted in a communication channel.
Abstract translation: 这里呈现技术来编码信息比特。 基于相应比特的信道损害的固有可靠性和抗扰度，信息比特被分成至少两个组。 信息比特组中的每一个以不同的编码强度进行编码。 所得到的码字可以存储在存储介质中或者在通信信道中传输。
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87.发明申请UPSTREAM CONTENTION MEASURMENT REPORTING AND MITIGATION IN DOCSIS REMOTE PHY NETWORK ENVIRONMENTS 有权上海远程物理网络环境中的上报内部测量报告和缓解公开(公告)号：US20150295838A1
公开(公告)日：2015-10-15
申请号：US14680873
申请日：2015-04-07
Applicant: CISCO TECHNOLOGY, INC.
IPC: H04L12/807 , H04L12/801
CPC classification number: H04L5/0007 , H04B3/542 , H04J3/0667 , H04J3/0673 , H04L5/006 , H04L12/2801 , H04L27/2697 , H04L27/3405 , H04L27/345 , H04L47/12 , H04L47/27
Abstract: An example method for upstream contention measurement and reporting in Data Over Cable Service Interface Specification (DOCSIS) remote physical layer (R-PHY) network environments is provided and includes receiving, at a Converged Cable Access Platform (CCAP) core from a R-PHY node over a converged interconnect network (CIN) in the DOCSIS R-PHY network environment, an indication of a collision level in an upstream network between the R-PHY node and a plurality of cable modems (CMs), calculating a congestion level in the upstream network based on the collision level indicated by the R-PHY node, adjusting back-off window parameters for cable modem retransmissions based on the calculated congestion level, and adjusting a contention transmission opportunity density in a downstream Media Access Protocol (MAP) message based on the adjusted back-off window parameters.
Abstract translation: 提供了一种用于数据有线服务接口规范（DOCSIS）远程物理层（R-PHY）网络环境中的上游竞争测量和报告的示例方法，包括在R-PHY的融合电缆接入平台（CCAP）核心处接收 在DOCSIS R-PHY网络环境中的融合互连网络（CIN）上的节点，指示R-PHY节点和多个电缆调制解调器（CM）之间的上游网络中的冲突级别，计算在 基于由R-PHY节点指示的冲突级别的上行网络，基于所计算的拥塞级别调整用于电缆调制解调器重传的后退窗口参数，以及基于下游媒体接入协议（MAP）消息中的争用传输机会密度来调整 在调整后的退出窗口参数上。
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公开(公告)号：US20150201422A1
公开(公告)日：2015-07-16
申请号：US14155859
申请日：2014-01-15
Applicant: Cisco Technology, Inc.
Inventor： Hang Jin
CPC classification number: H04L27/2647 , H04B17/345 , H04L5/0048
Abstract: Techniques are presented herein for detecting burst noise in a received orthogonal frequency division multiplex (OFDM) transmission. An OFDM transmission is received that includes pilots transmitted at different instances of time but on the same subcarrier during a predetermined time interval such that there are a plurality of different pairs of pilots that are on the same subcarriers during the predetermined time interval. For each possible pair of pilots, an equalized pilot is generated using received values for first and second pilots of the pair. A signal-to-noise ratio is computed for each equalized pilot. A determination is made as to which pilots, if any, are affected by burst noise by comparing the signal-to-noise ratio among the plurality of equalized pilots. Pilots determined to be affected by burst noise are removed from a channel response computation.
Abstract translation: 这里提供了用于在接收的正交频分复用（OFDM）传输中检测突发噪声的技术。 接收OFDM传输，该OFDM传输包括在预定时间间隔期间在不同时间但在相同子载波上发射的导频，使得在预定时间间隔期间存在多个不同的导频对在相同子载波上。 对于每个可能的导频对，使用对中的第一和第二导频的接收值来生成均衡导频。 为每个均衡的导频计算信噪比。 通过比较多个均衡飞行员之间的信噪比，确定哪个导频（如果有的话）受到突发噪声的影响。 确定受突发噪声影响的飞行员从通道响应计算中移除。
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公开(公告)号：US09071401B2
公开(公告)日：2015-06-30
申请号：US14056300
申请日：2013-10-17
Applicant: Cisco Technology, Inc.
Inventor： Hang Jin , Koen Van Renterghem , Richard Meller , Denis Downey
CPC classification number: H04L1/0054 , H04B1/1027 , H04L1/0045 , H04L1/0057 , H04L25/022 , H04L25/067
Abstract: Presented herein are pilot-less noise estimation techniques that utilize a correlation between attributes of a received signal and the noise to generate signal-to-noise ratio (SNR) estimate for the signal. More specifically, an interval of a digital signal is received a log-likelihood ratio (LLR) value is calculated for a plurality of bits in the interval of the signal. A scalar value that relates to a distribution of the calculated LLR values is computed. The SNR for the interval of the signal is determined based on a predetermined correlation between the scalar value and noise within the received interval of the signal.
Abstract translation: 这里呈现的是无干扰噪声估计技术，其利用接收信号的属性与噪声之间的相关性来生成信号的信噪比（SNR）估计。 更具体地，接收数字信号的间隔，对信号的间隔中的多个位计算对数似然比（LLR）值。 计算与计算的LLR值的分布有关的标量值。 基于信号的接收间隔内的标量值和噪声之间的预定相关性来确定信号间隔的SNR。
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90.发明申请Encoding Techniques Using Multiple Coding Strengths within a Single LDPC Code Word 有权在单个LDPC码字中使用多重编码优势的编码技术公开(公告)号：US20140359390A1
公开(公告)日：2014-12-04
申请号：US13904094
申请日：2013-05-29
Applicant: Cisco Technology, Inc.
Inventor： Hang Jin
IPC: H03M13/11
CPC classification number: H03M13/1148 , H03M13/255 , H03M13/356 , H04L1/0041 , H04L1/0058 , H04L1/007
Abstract: Techniques are presented herein to encode information bits. The information bits are partitioned into at least two groups based on inherent reliability and immunity to channel impairments of the respective bits. Each of the groups of information bits is encoded with a different coding strength. The resulting code word may be stored in a storage media or transmitted in a communication channel.
Abstract translation: 这里呈现技术来编码信息比特。 基于相应比特的信道损害的固有可靠性和抗扰度，信息比特被分成至少两个组。 信息比特组中的每一个以不同的编码强度进行编码。 所得到的码字可以存储在存储介质中或者在通信信道中传输。
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