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1. 发明授权

US08971395B2 Decision feedback equalizer having programmable taps 有权
标题翻译：具有可编程抽头的判决反馈均衡器
公开(公告)号：US08971395B2
公开(公告)日：2015-03-03
申请号：US13293513
申请日：2011-11-10
申请人： Ming-Chieh Huang , Jing Jing Chen , Chan-Hong Chern , Tao Wen Chung , Chih-Chang Lin , Yuwen Swei
发明人： Ming-Chieh Huang , Jing Jing Chen , Chan-Hong Chern , Tao Wen Chung , Chih-Chang Lin , Yuwen Swei
IPC分类号： H03H7/30 , H04L25/03
CPC分类号： H04L25/03057 , H04L2025/0349 , H04L2025/03566 , H04L2025/03617 , H04L2025/03687
摘要： A Decision Feedback Equalizer (DFE) with programmable taps includes a summer configured to receive a DFE input signal. Delay elements are coupled to the summer. The delay elements are connected in series. Each delay element provides a respective delayed signal of an input signal to the delay element. A weight generator is configured to provide tap weights. The DFE is configured to multiply each tap weight to the respective delayed signal from the respective delay element to provide tap outputs. Each tap output is selectively enabled to be added to the summer or disabled based on a first comparison of a first threshold value and each impulse response or each tap weight corresponding to the respective tap output, where the impulse response is the DFE input signal in response to a pulse signal transmitted through a channel.
摘要翻译：具有可编程抽头的判决反馈均衡器（DFE）包括一个加法器，用于接收DFE输入信号。延迟元素与夏天相结合。延迟元件串联连接。每个延迟元件向延迟元件提供输入信号的相应延迟信号。重量发生器被配置成提供抽头重量。 DFE被配置为将每个抽头权重乘以来自相应延迟元件的相应延迟信号以提供抽头输出。基于第一阈值和对应于各抽头输出的每个脉冲响应或每个抽头权重的第一比较，每个抽头输出被选择性地被加到加法器或禁止中，其中脉冲响应是响应中的DFE输入信号通过通道传输的脉冲信号。

2. 发明授权

US08923382B2 Tap adaptation with a fully unrolled decision feedback equalizer 有权
标题翻译：点击适应与完全展开的决策反馈均衡器
公开(公告)号：US08923382B2
公开(公告)日：2014-12-30
申请号：US13422403
申请日：2012-03-16
申请人： Choshu Ito , Erik V. Chmelar
发明人： Choshu Ito , Erik V. Chmelar
IPC分类号： H04L25/03
CPC分类号： H04L27/01 , H04L25/03057 , H04L2025/03687 , H04L2025/037
摘要： Described embodiments adapt one or more taps of a decision feedback equalizer of a receiver by setting a reference voltage for each of one or more data recovery comparators to a corresponding predetermined initial value. The data recovery comparators generate a bit value for each sample of a received signal. A tap adaptation module of the receiver selects a window of n received bit samples. The tap adaptation module iteratively, for each of the one or more data recovery comparators, tracks (i) a detected number of bits having a logic 0 value, and (ii) a detected number of bits having a logic 1 value. The tap adaptation module adjusts, based on a ratio of the detected number of bits having a logic 0 value to the detected number of bits having a logic 1 value, the reference voltage for the corresponding data recovery comparator by a predetermined step amount.
摘要翻译：描述的实施例通过将一个或多个数据恢复比较器中的每一个的参考电压设置为相应的预定初始值来适配接收机的判决反馈均衡器的一个或多个抽头。数据恢复比较器为接收信号的每个采样产生一个位值。接收机的抽头适配模块选择n个接收位样本的窗口。对于一个或多个数据恢复比较器中的每一个，迭代地分接自适应模块，跟踪（i）具有逻辑0值的检测到的比特数，以及（ii）具有逻辑1值的检测到的比特数。抽头适配模块基于检测到的具有逻辑0值的位数与检测到的具有逻辑1值的位数的比率，将相应数据恢复比较器的参考电压调整预定步长量。

3. 发明申请

US20130138375A1 System and Methods for Adaptive Equalization for Optical Modulation Formats 有权
标题翻译：用于光学调制格式的自适应均衡的系统和方法
公开(公告)号：US20130138375A1
公开(公告)日：2013-05-30
申请号：US13307429
申请日：2011-11-30
申请人： Xiang Zhou , Lynn Nelson
发明人： Xiang Zhou , Lynn Nelson
IPC分类号： G06F19/00
CPC分类号： H04B10/532 , H04B10/6166 , H04J14/06 , H04L25/03038 , H04L25/03057 , H04L2025/03401 , H04L2025/0342 , H04L2025/03687
摘要： A method for modifying the performance of an adaptive equalizer in a receiver is provided. A carrier wave comprising a first polarization state and a second polarization state, wherein there is a correlation between the first polarization state and the second polarization state, is received. The first polarization state and the second polarization state are demultiplexed to generate two respective constellations. A first expected value based on the first constellation, and a second expected value based on the second constellation, are calculated. An adaptive equalizer receives a first and second signals associated with the respective polarization states. The adaptive equalizer generates outputs based on the signals. These outputs are used to generate error values. Feedback is input into the adaptive equalizer, wherein the feedback is based on the error values.
摘要翻译：提供了一种用于在接收机中修改自适应均衡器的性能的方法。包括第一偏振状态和第二偏振状态的载波，其中存在第一偏振状态和第二偏振状态之间的相关性。第一偏振态和第二偏振状态被解复用以产生两个相应的星座。计算基于第一星座的第一预期值和基于第二星座的第二预期值。自适应均衡器接收与相应极化状态相关联的第一和第二信号。自适应均衡器根据信号产生输出。这些输出用于生成错误值。反馈被输入到自适应均衡器中，其中反馈基于误差值。

4. 发明授权

US08416846B1 Systems, circuits and methods for adapting taps of a decision feedback equalizer in a receiver 失效
标题翻译：用于在接收机中调整判决反馈均衡器的抽头的系统，电路和方法
公开(公告)号：US08416846B1
公开(公告)日：2013-04-09
申请号：US12973797
申请日：2010-12-20
申请人： Andrew Lin , Faramarz Bahmani
发明人： Andrew Lin , Faramarz Bahmani
IPC分类号： H04L27/18 , H04L27/10 , H04L5/16 , H04B1/38
CPC分类号： H04L25/03057 , H04L25/03885 , H04L2025/03579 , H04L2025/03687 , H04L2025/037
摘要： A receiver is optimized by adapting the taps of a decision feedback equalizer component within the receiver. Data decisions and error decisions are generated. These data decision and error decisions are used to derive an error rate of data by measuring the number of margin hits that occur. A balance value is also calculated from the data decisions and the error decisions. The balance value is used to update a tap of the decision feedback equalizer. The updating of the tap continues until the number of margin hits has been minimized.
摘要翻译：接收机通过调整接收机内的判决反馈均衡器组件的抽头来优化。生成数据决策和错误决策。这些数据决定和错误决定用于通过测量发生的边缘匹配数来导出数据的错误率。还可以从数据决策和错误决策中计算余额值。平衡值用于更新决策反馈均衡器的抽头。继续更新水龙头，直到保证金点击次数最小化为止。

5. 发明申请

US20120076194A1 RECEIVER EMPLOYING NON-PILOT REFERENCE CHANNELS FOR EQUALIZING A RECEIVED SIGNAL 有权
标题翻译：接收者使用非参考通道来均衡接收到的信号
公开(公告)号：US20120076194A1
公开(公告)日：2012-03-29
申请号：US13311654
申请日：2011-12-06
申请人： Rami Banna , Uwe Sontowski , Long Ung , Graeme K. Woodward
发明人： Rami Banna , Uwe Sontowski , Long Ung , Graeme K. Woodward
IPC分类号： H04L27/01
CPC分类号： H04L25/03044 , H04B1/7097 , H04L2025/03509 , H04L2025/03617 , H04L2025/03687
摘要： In one embodiment, a receiver has a reference generator and a main equalizer. The reference generator equalizes a received signal using one or more pilot reference signals. Then, the reference generator decodes one or more predetermined data channels of the equalized signal, makes hard decisions on the data of each decoded channel, and regenerates the original coding sequence of each decoded channel. The main equalizer uses each re-encoded channel as an additional reference signal along with one or more pilot signals to equalize a time-delayed version of the received signal. In alternative embodiments, the receiver might also have a step-size generator which selects optimum step sizes from a look-up table based on the number of re-encoded channels and the power of those channels. The step size is then used by the main equalizer along with the re-encoded channels to equalize the time-delayed received signal.
摘要翻译：在一个实施例中，接收器具有参考发生器和主均衡器。参考发生器使用一个或多个导频参考信号来均衡接收信号。然后，基准发生器解码均衡信号的一个或多个预定数据信道，对每个解码信道的数据作出硬判决，并重新生成每个解码信道的原始编码序列。主均衡器使用每个重编码信道作为附加参考信号以及一个或多个导频信号来均衡接收信号的时间延迟版本。在替代实施例中，接收机还可以具有步长生成器，其基于重新编码的信道的数量和这些信道的功率从查找表中选择最佳步长。然后，主均衡器与重新编码的信道一起使用步长来均衡时间延迟的接收信号。

6. 发明授权

US08077819B2 Search engine for a receive equalizer 有权
标题翻译：搜索引擎的接收均衡器
公开(公告)号：US08077819B2
公开(公告)日：2011-12-13
申请号：US12571994
申请日：2009-10-01
申请人： Afshin Momtaz , Rajesh Satapathy , Chung-Jue Chen
发明人： Afshin Momtaz , Rajesh Satapathy , Chung-Jue Chen
IPC分类号： H04B1/10
CPC分类号： H04L25/03057 , H03L7/0814 , H04L7/0037 , H04L7/033 , H04L2025/0349 , H04L2025/03617 , H04L2025/03662 , H04L2025/03687 , H04L2025/037
摘要： A search engine selects initial coefficients for a receive equalizer. The search engine may be incorporated into a communication receiver that includes a decision feedback equalizer and clock and data recovery circuit. Here, the search engine may initialize various adaptation loops that may control the operation of, for example, a decision feedback equalizer, a clock and data recovery circuit and a continuous time filter. The receiver may include an analog-to-digital converter that is used to generate soft decision data for some of the adaptation loops.
摘要翻译：搜索引擎选择接收均衡器的初始系数。搜索引擎可以并入到包括判决反馈均衡器和时钟和数据恢复电路的通信接收器中。这里，搜索引擎可以初始化可以控制例如判决反馈均衡器，时钟和数据恢复电路以及连续时间滤波器的操作的各种适配环路。接收机可以包括用于产生一些适配环路的软判决数据的模拟 - 数字转换器。

7. 发明申请

US20110069790A1 RECEIVER AND METHOD 失效
标题翻译：接收者和方法
公开(公告)号：US20110069790A1
公开(公告)日：2011-03-24
申请号：US12852749
申请日：2010-08-09
申请人： Obioma Chiedozie Donald OKEHIE
发明人： Obioma Chiedozie Donald OKEHIE
IPC分类号： H04L27/06
CPC分类号： H04L25/0232 , H04L5/0007 , H04L5/0048 , H04L25/0216 , H04L25/022 , H04L25/0222 , H04L25/0226 , H04L25/0236 , H04L25/025 , H04L25/03299 , H04L27/2647 , H04L2025/03414 , H04L2025/03496 , H04L2025/03687 , H04L2025/03732
摘要： A receiver detects and recovers data from Orthogonal Frequency Division Multiplexed (OFDM) symbols, which include pilot sub-carriers as well as data bearing sub-carriers. The receiver comprises a channel estimation processor and a channel estimate post processor. The channel estimation processor includes a pilot acquisition unit adapted to generate a sample of the channel transfer function for each pilot sub-carrier in a received OFDM symbol, and a channel estimator which is arranged to generate an estimate of the channel transfer function providing samples of the channel transfer function at each sub-carrier position in the received OFDM symbol from the pilot derived samples provided by the pilot acquisition unit. The channel estimate post processor is arranged to process the estimate of the channel transfer function received from the channel estimation processor to generate a processed version of the channel transfer function. The channel estimate post processor includes a controller, and a plurality of prediction filters. The controller is arranged to filter the estimate of the channel transfer function produced by the channel estimation processor using the plurality of prediction filters to form the processed version of the channel transfer function to effect of reducing noise in the processed version of the channel transfer function with respect to the estimate of the channel transfer function provided by the channel estimation processor.
摘要翻译：接收机检测和恢复来自正交频分复用（OFDM）符号的数据，其包括导频子载波以及数据承载子载波。接收机包括信道估计处理器和信道估计后处理器。信道估计处理器包括：导频获取单元，适于在接收的OFDM符号中为每个导频子载波生成信道传递函数的采样;以及信道估计器，被配置为生成提供信道传递函数的估计，从由导频获取单元提供的导频得到的样本在接收的OFDM符号中的每个子载波位置处的信道传递函数。信道估计后处理器被设置为处理从信道估计处理器接收的信道传递函数的估计，以生成信道传递函数的处理版本。信道估计后处理器包括控制器和多个预测滤波器。控制器被布置为使用多个预测滤波器来过滤由信道估计处理器产生的信道传递函数的估计，以形成信道传递函数的处理版本，以在通道传递函数的处理版本中降低噪声，相对于由信道估计处理器提供的信道传递函数的估计。

8. 发明授权

US07739320B2 Waveform equalizer, waveform equalization method, and integrated circuit 有权
标题翻译：波形均衡器，波形均衡方法和集成电路
公开(公告)号：US07739320B2
公开(公告)日：2010-06-15
申请号：US11130604
申请日：2005-05-17
申请人： Yoshinobu Matsumura , Naoya Tokunaga
发明人： Yoshinobu Matsumura , Naoya Tokunaga
IPC分类号： G06F17/10
CPC分类号： H04L25/03038 , H04L25/03057 , H04L2025/03382 , H04L2025/03477 , H04L2025/0349 , H04L2025/03617 , H04L2025/03687
摘要： A waveform equalizer includes a filter unit, an error estimation unit, a tap coefficient storage unit, and an update amount calculation unit which includes an intermediate calculation unit and an update amount setting unit. Coefficient update amount ΔCi(n) for an ith tap is calculated according to an equation ΔCi(n)=αi(n)×μ×e(n)×x*(n−i) with the multiplication by αi(n) being performed by the update amount setting unit. Here, 0
摘要翻译：波形均衡器包括滤波器单元，误差估计单元，抽头系数存储单元和包括中间计算单元和更新量设置单元的更新量计算单元。根据等式＆Dgr计算第i个抽头的系数更新量和Dgr; Ci（n）; Ci（n）=αi（n）×μ×e（n）×x *（n-i）乘以αi （n）由更新量设定单元执行。这里，0 <αi（n）＆nlE; 1和αi（n）是与Ci（n-1）单调增加的函数f（Ci（n-1））。

9. 发明授权

US07649932B2 Segmented equalizer 失效
标题翻译：分段均衡器
公开(公告)号：US07649932B2
公开(公告)日：2010-01-19
申请号：US11291344
申请日：2005-11-30
申请人： Ping Dong , Tao Yu
发明人： Ping Dong , Tao Yu
IPC分类号： H03H7/30
CPC分类号： H04L25/03038 , H04L25/03057 , H04L2025/03375 , H04L2025/03477 , H04L2025/0349 , H04L2025/03687
摘要： In one embodiment of the present invention, a segmented equalizer includes a plurality of feedforward equalizer segments, each feedforward equalizer segment responsive to delayed samples of an input signal {vn}, wherein n is the index of samples, and including a filter block for filtering the delayed samples by using coefficients which are updated based on a step size generated for each equalizer segment.
摘要翻译：在本发明的一个实施例中，分段均衡器包括多个前馈均衡器段，每个前馈均衡器段响应于输入信号{vn}的延迟采样，其中n是采样索引，并且包括用于滤波的滤波器块通过使用基于为每个均衡器段生成的步长来更新的系数的延迟采样。

10. 发明授权

US07602844B2 On-line step-size calculation using signal power estimation and tone grouping of the frequency-domain equalizer for DMT-based transceiver 有权
标题翻译：使用基于DMT的收发器的频域均衡器的信号功率估计和音调分组的在线步长计算
公开(公告)号：US07602844B2
公开(公告)日：2009-10-13
申请号：US11293139
申请日：2005-12-05
申请人： Chih-Feng Wu , Muh-Tian Shiue , Chorng-Kuang Wang , An-Yeu Wu
发明人： Chih-Feng Wu , Muh-Tian Shiue , Chorng-Kuang Wang , An-Yeu Wu
IPC分类号： H03H7/30 , H03H7/40 , H03K5/159
CPC分类号： H04L25/03159 , H04L2025/03414 , H04L2025/03687
摘要： An efficient method for calculating the step-sizes for a frequency-domain equalizer of a discrete-multitone communications system using signal power estimation and tone grouping (SPE-TG) while on-line. The SPE-TG method is used to calculate a plurality of subchannel step-sizes which are then stored in a lookup table. When on-line, the method uses signal power estimation to select step sizes for each tone, and uses these step sizes for frequency domain equalization. The SPE-TG method simplifies the calculations necessary for frequency domain equalization, thereby saving significant hardware and/or processing resources. The SPE-TG method is reliable and robust, and does not depend upon assumptions about the line, location, or channel.
摘要翻译：一种用于在线上使用信号功率估计和音调分组（SPE-TG）来计算离散多音通信系统的频域均衡器的步长的有效方法。 SPE-TG方法用于计算多个子信道步长，然后存储在查找表中。当在线时，该方法使用信号功率估计来选择每个音调的步长，并且使用这些步长来进行频域均衡。 SPE-TG方法简化了频域均衡所需的计算，从而节省了大量的硬件和/或处理资源。 SPE-TG方法是可靠和鲁棒的，不依赖于关于线路，位置或频道的假设。

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