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81. 发明授权

US08411733B2 Signal equalizer for a signal transmission network 有权
标题翻译：用于信号传输网络的信号均衡器
公开(公告)号：US08411733B2
公开(公告)日：2013-04-02
申请号：US12815611
申请日：2010-06-15
申请人： Brian Berscheid , Zohreh Andalibi , Eric Salt
发明人： Brian Berscheid , Zohreh Andalibi , Eric Salt
IPC分类号： H03H7/30
CPC分类号： H04L25/03038 , H04L2025/03617 , H04L2025/03681
摘要： In an RF signal transmission network such as the reverse channels of a coaxial cable network, there is provided at least one adaptive equalizer for pre- or post-filtering inter-symbol interference in the transmitted signals, the adaptive equalizer having a series of coefficients for which values are required. In order to improve the transmission efficiency the preamble used in these channels is shortened by coarsely estimating the channel using a short “unique word’ placed at the beginning of the equalizer training sequence. The coarse channel estimate is crudely inverted to produce a set of equalizer coefficients which partially equalize the channel. By initializing the adaptive equalizer with these approximate coefficients, it is possible to reduce the length of the training sequence needed for the equalizer to converge.
摘要翻译：在诸如同轴电缆网络的反向信道的RF信号传输网络中，提供了至少一个自适应均衡器，用于在所发送的信号中对符号间干扰进行前或后滤波，所述自适应均衡器具有一系列系数需要哪些值。为了提高传输效率，通过使用放置在均衡器训练序列开始处的短独特字来粗略估计信道来缩短在这些信道中使用的前同步码。粗略的信道估计被粗略地反转以产生使信道部分均衡的一组均衡器系数。通过用这些近似系数初始化自适应均衡器，可以减少均衡器收敛所需的训练序列的长度。

82. 发明申请

US20120195346A1 COMMUNICATION DEVICE AND METHOD FOR PACKET-BASED OFDM COMMUNICATIONS WITH DIFFERING LENGTH CYCLIC PREFIXES 有权
标题翻译：具有不同长度循环前缀的基于分组的OFDM通信的通信设备和方法
公开(公告)号：US20120195346A1
公开(公告)日：2012-08-02
申请号：US13357747
申请日：2012-01-25
申请人： Kennan Laudel , Yongfang Guo
发明人： Kennan Laudel , Yongfang Guo
IPC分类号： H04B1/69 , H04B1/692
CPC分类号： H04L5/0048 , H04L25/03019 , H04L27/2607 , H04L2025/03414 , H04L2025/03681 , H04L2025/03777 , H04W72/0406
摘要： A network communication device is receive packet-based orthogonal frequency division multiplexed (OFDM) transmissions from one or more other devices in a network over a communication channel. The network communication device may determine a delay spread of the communication channel based on receipt of a probe signal from a transmitting device, configure a channel filter to effectively shorten the channel based on the delay spread, and instruct the transmitting device to shorten a length of a cyclic prefix for subsequent packet-based OFDM transmissions to be received from the transmitting device over the channel.
摘要翻译：网络通信设备将通过通信信道从网络中的一个或多个其他设备接收基于分组的正交频分复用（OFDM）传输。网络通信设备可以基于从发送设备接收到探测信号来确定通信信道的延迟扩展，配置信道滤波器以根据延迟扩展来有效地缩短信道，并指示发送设备缩短用于通过信道从发射设备接收的用于后续基于分组的OFDM传输的循环前缀。

83. 发明授权

US08213494B2 Sign-based general zero-forcing adaptive equalizer control 有权
标题翻译：基于符号的通用强制自适应均衡器控制
公开(公告)号：US08213494B2
公开(公告)日：2012-07-03
申请号：US12489356
申请日：2009-06-22
申请人： Yasuo Hidaka
发明人： Yasuo Hidaka
IPC分类号： H04L27/10
CPC分类号： H04L25/03057 , H04L7/0025 , H04L2025/0349 , H04L2025/03681 , H04L2025/03783
摘要： In one embodiment, a system includes one or more digital feedback equalizers (DFEs) that include one or more residual intersymbol interference (ISI) detectors, one or more column balancers, and one or more weight selectors. The residual ISI detectors produce a first output signal indicating whether the residual ISI of a received input signal has a positive sign or a negative sign. The column balancers select one of the first output signals to produce a second output signal. The weight selectors access one of the weight values. The weight value corresponds to the column balancer that produced the second output signal and the residual ISI detector that produced the first output signal, and has a magnitude that is substantially independent of the sign of the residual ISI. The weight selectors produce a third output signal based on the weight value and the sign of the residual ISI.
摘要翻译：在一个实施例中，系统包括一个或多个数字反馈均衡器（DFE），其包括一个或多个残余符号间干扰（ISI）检测器，一个或多个列平衡器和一个或多个权重选择器。剩余的ISI检测器产生指示接收的输入信号的剩余ISI是否具有正号或负号的第一输出信号。列平衡器选择第一输出信号之一以产生第二输出信号。重量选择器访问其中一个重量值。重量值对应于产生第二输出信号的列平衡器和产生第一输出信号的残余ISI检测器，并且具有基本上与剩余ISI的符号无关的幅度。重量选择器基于重量值和剩余ISI的符号产生第三输出信号。

84. 发明申请

US20120134407A1 ADAPTIVE EQUALIZATION WITH GROUP DELAY 有权
标题翻译：具有组延迟的自适应均衡
公开(公告)号：US20120134407A1
公开(公告)日：2012-05-31
申请号：US13071935
申请日：2011-03-25
申请人： Sudeep Bhoja , John S. Wang , Hai Tao
发明人： Sudeep Bhoja , John S. Wang , Hai Tao
IPC分类号： H04L27/01 , H04L27/06
CPC分类号： H04L25/03057 , H03H15/00 , H03H21/0012 , H04L7/0062 , H04L12/66 , H04L2025/0349 , H04L2025/03509 , H04L2025/03681
摘要： Methods, apparatuses, and systems are presented for performing adaptive equalization involving receiving a signal originating from a channel associated with inter-symbol interference, filtering the signal using a filter having a plurality of adjustable tap weights to produce a filtered signal, and adaptively updating each of the plurality of adjustable tap weights to a new value to reduce effects of inter-symbol interference, wherein each of the plurality of adjustable tap weights is adaptively updated to take into account a constraint relating to a measure of error in the filtered signal and a constraint relating to group delay associated with the filter. Each of the plurality of adjustable tap weights may be adaptively updated to drive group delay associated with the filter toward a target group delay.
摘要翻译：呈现用于执行自适应均衡的方法，装置和系统，该自适应均衡涉及接收与符号间干扰相关联的信道的信号，使用具有多个可调抽头权重的滤波器对该信号进行滤波以产生滤波信号，以及自适应地更新每个将多个可调节抽头权重分配到新值以减少符号间干扰的影响，其中多个可调节抽头权重中的每一个被自适应地更新以考虑与滤波信号中的误差测量有关的约束，以及与过滤器相关的组延迟有关的约束。可以自适应地更新多个可调节抽头权重中的每一个以将与过滤器相关联的群组延迟朝向目标组延迟。

85. 发明申请

US20110069605A1 COAXIAL NETWORK COMMUNICATION NODE AND METHODS FOR COMMUNICATING MULTIMEDIA OVER A COAXIAL NETWORK WITH REDUCED-LENGTH CYCLIC PREFIXES 失效
标题翻译：同轴网络通信节点和方法用于在具有减少长度循环前缀的同轴网络中通信多媒体
公开(公告)号：US20110069605A1
公开(公告)日：2011-03-24
申请号：US12563280
申请日：2009-09-21
申请人： Kennan Laudel , Yongfang Guo
发明人： Kennan Laudel , Yongfang Guo
IPC分类号： H04J11/00 , H04L27/28 , H04J4/00
CPC分类号： H04L5/0048 , H04L25/03019 , H04L27/2607 , H04L2025/03414 , H04L2025/03681 , H04L2025/03777 , H04W72/0406
摘要： A coaxial network communication node receives multimedia content with one or more other nodes in a coaxial network. The node determines a delay-spread of a coaxial channel based on receipt of a probe from a transmitting node and configures a channel-shortening time-domain equalizer (TEQ) filter to effectively shorten the channel based on the delay spread. The node instructs the transmitting node to shorten a length of a cyclic prefix for subsequent packet-based transmissions to be received from the transmitting node. The probe is stored and reused until the channel-shortening TEQ filter converges. The nodes may be configured to communicate in accordance with the Multimedia over Coax Alliance (MoCA®) specifications.
摘要翻译：同轴网络通信节点在同轴网络中与一个或多个其他节点接收多媒体内容。该节点基于从发送节点接收探测器来确定同轴信道的延迟扩展，并且配置信道缩短时域均衡器（TEQ）滤波器，以基于延迟扩展来有效地缩短信道。节点指示发送节点缩短用于从发送节点接收的后续基于分组的传输的循环前缀的长度。探头被存储并重复使用，直到通道缩短TEQ滤波器收敛。节点可以被配置为根据多媒体同轴联盟（MoCA）规范进行通信。

86. 发明申请

US20100316111A1 SIGNAL EQUALIZER FOR A SIGNAL TRANSMISSION NETWORK 有权
标题翻译：用于信号传输网络的信号均衡器
公开(公告)号：US20100316111A1
公开(公告)日：2010-12-16
申请号：US12815611
申请日：2010-06-15
申请人： Brian Berscheid , Zohreh Andalibi , Eric Salt
发明人： Brian Berscheid , Zohreh Andalibi , Eric Salt
IPC分类号： H04L27/01
CPC分类号： H04L25/03038 , H04L2025/03617 , H04L2025/03681
摘要： In an RF signal transmission network such as the reverse channels of a coaxial cable network, there is provided at least one adaptive equalizer for pre- or post-filtering inter-symbol interference in the transmitted signals, the adaptive equalizer having a series of coefficients for which values are required. In order to improve the transmission efficiency the preamble used in these channels is shortened by coarsely estimating the channel using a short “unique word’ placed at the beginning of the equalizer training sequence. The coarse channel estimate is crudely inverted to produce a set of equalizer coefficients which partially equalize the channel. By initializing the adaptive equalizer with these approximate coefficients, it is possible to reduce the length of the training sequence needed for the equalizer to converge.
摘要翻译：在诸如同轴电缆网络的反向信道的RF信号传输网络中，提供了至少一个自适应均衡器，用于在所发送的信号中对符号间干扰进行前或后滤波，所述自适应均衡器具有一系列系数需要哪些值。为了提高传输效率，通过使用放置在均衡器训练序列开始处的短的“唯一字”来粗略地估计信道来缩短在这些信道中使用的前同步码。粗略的信道估计被粗略地反转以产生使信道部分均衡的一组均衡器系数。通过用这些近似系数初始化自适应均衡器，可以减少均衡器收敛所需的训练序列的长度。

87. 发明授权

US07706436B2 Decision-feedback equalizer and method of updating filter coefficients 有权
标题翻译：决策反馈均衡器和更新滤波器系数的方法
公开(公告)号：US07706436B2
公开(公告)日：2010-04-27
申请号：US10990436
申请日：2004-11-18
申请人： Sergey Zhidkov
发明人： Sergey Zhidkov
IPC分类号： H03H7/30
CPC分类号： H04L1/0054 , H04L1/006 , H04L1/0071 , H04L25/03267 , H04L2025/0349 , H04L2025/03617 , H04L2025/03681
摘要： Exemplary embodiments of the present invention provide an equalizer combined with a decoder and a method of updating filter coefficients. The method may include calculating output error signals ek, multiplying the output error signals by a parameter, obtaining a partial value by multiplying a delayed decoder decision stored in a filter delay line corresponding to an i-th filter coefficient by the result obtaining a partial value by multiplying a constant by a feedback coefficient and obtaining an updated value by adding the two partial values.
摘要翻译：本发明的示例性实施例提供了与解码器组合的均衡器和更新滤波器系数的方法。该方法可以包括计算输出误差信号ek，将输出误差信号乘以参数，通过将存储在与第i个滤波器系数相对应的滤波器延迟线中的延迟解码器判定乘以结果获得部分值来获得部分值，获得部分值通过将常数乘以反馈系数，并通过将两个部分值相加来获得更新的值。

88. 发明申请

US20100080282A1 RE-ADAPTION OF EQUALIZER PARAMETER TO CENTER A SAMPLE POINT IN A BAUD-RATE CLOCK AND DATA RECOVERY RECEIVER 失效
标题翻译：平衡参数的重新适应中心在波特率时钟和数据恢复接收器中的一个示例点
公开(公告)号：US20100080282A1
公开(公告)日：2010-04-01
申请号：US12240046
申请日：2008-09-29
申请人： Freeman Y. Zhong , Amaresh V. Malipatil , Hollis H. Poche, JR. , Yikui Dong , Venkata Naga Madhavapeddy
发明人： Freeman Y. Zhong , Amaresh V. Malipatil , Hollis H. Poche, JR. , Yikui Dong , Venkata Naga Madhavapeddy
IPC分类号： H04L27/01
CPC分类号： H04L25/03057 , H04L7/0058 , H04L7/033 , H04L2025/0349 , H04L2025/03681
摘要： An apparatus generally having a first circuit and a second circuit. The first circuit may be configured to (i) generate an equalizer parameter in response to an input signal, the equalizer parameter causing a cancellation of post-cursor inter-symbol interference from a plurality of symbols in the input signal and (ii) generate an output signal in response to both the input signal and the equalizer parameter. The second circuit may be configured to (i) generate a target parameter signal in response to the input signal, the target parameter signal representing a mean value of a plurality of sample points of the symbols and (ii) generate a control signal in response to the target parameter signal, the control signal causing a reduction of the equalizer parameter, the reduction causing a decrease in the cancellation of the post-cursor inter-symbol interference from the symbols, wherein the apparatus does not cancel pre-cursor inter-symbol interference.
摘要翻译：通常具有第一电路和第二电路的装置。第一电路可以被配置为（i）响应于输入信号产生均衡器参数，均衡器参数导致来自输入信号中的多个符号的后标记符号间干扰的消除，并且（ii）生成响应于输入信号和均衡器参数的输出信号。第二电路可以被配置为（i）响应于输入信号产生目标参数信号，目标参数信号表示符号的多个采样点的平均值，并且（ii）响应于所述目标参数信号，所述控制信号导致所述均衡器参数的减小，所述减小导致从所述符号中消除后标记符号间干扰的减少，其中所述设备不取消前标符号间干扰。

89. 发明申请

US20100054323A1 Adaptive Receive-Side Equalization 有权
公开(公告)号：US20100054323A1
公开(公告)日：2010-03-04
申请号：US12615824
申请日：2009-11-10
申请人： Ramin Farjad-rad
发明人： Ramin Farjad-rad
IPC分类号： H04L27/01
CPC分类号： H04L25/03159 , H04L25/03019 , H04L25/03343 , H04L25/03885 , H04L25/085 , H04L2025/03681
摘要： An adaptive receiver equalizes incoming data expressed as a series of symbols, the degree of equalization being adjusted by some adaptive control logic. An amplitude detector samples the amplitude of the eye openings of incoming symbols and conveys the resulting measures of eye amplitude to the adaptive control logic. The control logic experiments with different equalization settings while monitoring the resulting eye amplitude to find the equalization setting that provides incoming data eyes of the highest amplitude. A data filter may be included to enable the amplitude detector only in response to particular incoming data patterns.

90. 发明授权

US07672368B2 PHY control module for a multi-pair gigabit transceiver 有权
标题翻译：用于多对千兆位收发器的PHY控制模块
公开(公告)号：US07672368B2
公开(公告)日：2010-03-02
申请号：US10744527
申请日：2003-12-23
申请人： Oscar E. Agazzi
发明人： Oscar E. Agazzi
IPC分类号： H03H7/30 , H03H7/40 , H03K5/159
CPC分类号： H04L7/0062 , G01R31/3004 , G01R31/3008 , G01R31/3016 , G01R31/31715 , G01R31/318502 , G01R31/318552 , G01R31/318594 , H03H21/0067 , H03H2021/007 , H03H2021/0074 , H04B3/23 , H04B3/32 , H04B3/487 , H04L1/0009 , H04L1/0054 , H04L1/08 , H04L1/242 , H04L7/0334 , H04L25/03038 , H04L25/03057 , H04L25/03146 , H04L25/03267 , H04L25/067 , H04L25/14 , H04L25/4917 , H04L25/497 , H04L69/323 , H04L2025/03363 , H04L2025/03369 , H04L2025/03477 , H04L2025/0349 , H04L2025/03496 , H04L2025/03503 , H04L2025/03617 , H04L2025/03681 , H04L2025/03745
摘要： A control module for controlling convergence of cancellers, a decision feedback equalizer (DFE) and a timing recovery module. The control module includes a state machine operable to decouple the timing recovery module from the cancellers and the DFE while converging the cancellers and the DFE at the same time.
摘要翻译：用于控制消除器的收敛的控制模块，判决反馈均衡器（DFE）和定时恢复模块。控制模块包括状态机，可操作以将定时恢复模块与消除器和DFE分离，同时同时收敛消除器和DFE。

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