公开(公告)号：US20140044157A1

公开(公告)日：2014-02-13

申请号：US13965077

申请日：2013-08-12

申请人： THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

发明人： Mau-Chung Chang ,  Sai-Wang Tam ,  Gyung-Su Byun ,  Yanghyo Kim ,  Kanit Therdsteerasukdi ,  Jeremy Ir ,  Glenn Reinman ,  Jingsheng Cong

IPC分类号： H04L25/02 ,  H04L27/04

CPC分类号： H04L27/3483 ,  G06F15/7842 ,  G06F2213/0038 ,  G11C5/063 ,  G11C7/10 ,  G11C7/1057 ,  G11C7/1084 ,  H04L25/0274 ,  H04L27/04 ,  H04L45/60 ,  H04L2025/03388

摘要： Systems, apparatus, modules, and methods of communicating with memory devices utilizing multi-band communication containing a baseband and one or more amplitude shift keyed (ASK) RF channels over each differential pair of off-chip transmission lines. Configurations are described for interfacing between microprocessors, or controllers and memory devices or modules, and within a DIMM and its DRAM devices, and between multiple DIMM memory modules.

摘要翻译： 使用包含基带和一个或多个幅移键控（ASK）RF信道的多频带通信的存储器件进行通信的系统，装置，模块和方法，每个差分对的芯片外传输线路。 描述了用于在微处理器或控制器和存储设备或模块之间以及在DIMM及其DRAM设备内以及在多个DIMM存储器模块之间进行接口的配置。

公开(公告)号：US08379764B2

公开(公告)日：2013-02-19

申请号：US12992253

申请日：2009-07-30

申请人： Takahiro Ohyama ,  Takenori Sakamoto

发明人： Takahiro Ohyama ,  Takenori Sakamoto

IPC分类号： H04L27/06 ,  H03D1/00

CPC分类号： H04L25/0216 ,  H04B1/71637 ,  H04B1/7183 ,  H04L25/0224 ,  H04L25/0226 ,  H04L27/06 ,  H04L2025/03388

摘要： Disclosed are a receiving device and a channel estimation method that are capable of using the amplitude information of a received signal to perform proper channel estimation. In the device, a detection section (102) extracts the amplitude information of the OOK modulation signal sequence in which a known CES (Channel Estimation Sequence) composed of data “0” and “1” is OOK (On Off Keying)-modulated to obtain a detected signal sequence. A “1”-detection section (1042) extracts only the sample value corresponding to the data “1” from the sample values of the detected signal sequence to obtain an extracted signal sequence. A correlation calculating section (1043) performs the correlation calculation between the extracted signal sequence and the CES. A propagation delay estimation section (1044) estimates the propagation delay amount of a CIR (Channel Impulse Response) from the correlation calculation. An amplitude coefficient estimation section (1045) estimates the amplitude coefficient of the CIR from the correlation calculation.

摘要翻译： 公开了能够使用接收信号的振幅信息进行适当的信道估计的接收装置和信道估计方法。 在该装置中，检测部（102）提取OOK调制信号序列的振幅信息，其中由数据0和1组成的已知CES（信道估计序列）是OOK（开关键控））调制以获得检测信号 序列。 1检测部分（1042）仅从检测到的信号序列的样本值中提取与数据1相对应的样本值，以获得提取的信号序列。 相关计算部（1043）进行所提取的信号序列和CES之间的相关计算。 传播延迟估计部（1044）从相关计算估计CIR（信道脉冲响应）的传播延迟量。 幅度系数估计部（1045）根据相关计算来估计CIR的振幅系数。

公开(公告)号：US08223896B2

公开(公告)日：2012-07-17

申请号：US12510537

申请日：2009-07-28

申请人： Kambiz Zangi ,  Rajaram Ramesh

发明人： Kambiz Zangi ,  Rajaram Ramesh

IPC分类号： H04L27/06

CPC分类号： H04L25/03318 ,  H04L25/03229 ,  H04L2025/03388

摘要： Teachings presented herein offer reduced computational complexity for symbol sequence estimation, and also provide for the generation of soft bit values representing the reliability of that estimation. A demodulator is configured to generate these soft bit values by identifying a candidate value for each symbol in the sequence which is more likely than at least one other in a defined set of candidate values. Based on the candidate value identified for each symbol, the demodulator forms a reduced set of candidate values for the symbol by selecting as many additional candidate values from the defined set as are needed to have complementary bit values for each bit value in that identified candidate value. The demodulator calculates soft bit values for the symbol sequence based on a sequence estimation process whose state space for each symbol is constrained to the corresponding reduced set.

摘要翻译： 本文提供的教学提供了减少符号序列估计的计算复杂度，并且还提供了代表该估计的可靠性的软比特值的产生。 解调器被配置为通过在所定义的一组候选值中识别比所述序列中的至少另一个更可能的序列中的每个符号的候选值来生成这些软比特值。 基于为每个符号识别的候选值，解调器通过从所定义的集合中选择与所识别的候选值中的每个比特值具有互补比特值所需的附加候选值来形成用于该符号的候选值的缩减集合 。 解调器基于序列估计处理来计算符号序列的软比特值，其中每个符号的状态空间被约束到相应的缩减集。

公开(公告)号：US20110051853A1

公开(公告)日：2011-03-03

申请号：US12912927

申请日：2010-10-27

申请人： Ali S. Khayrallah

发明人： Ali S. Khayrallah

IPC分类号： H04L27/06

CPC分类号： H04L25/03318 ,  H04L25/03229 ,  H04L25/067 ,  H04L27/3416 ,  H04L27/38 ,  H04L2025/03388 ,  H04L2025/0342 ,  H04L2025/03426

摘要： Soft bit values are generated for received symbols transmitted based on a modulation constellation by demodulating the received symbols via a sequence of demodulation stages, each demodulation stage producing a symbol decision based on an effective constellation. Each effective constellation used by a non-final one of the demodulation stages includes subsets of centroids approximating a region of the modulation constellation. Adjacent ones of the subsets have one or more common points so that at least two adjacent subsets overlap. The soft bit values for the symbol decisions are determined based on detection metrics computed during demodulation for the points included in the effective constellation constructed incrementally over the sequence of demodulation stages, the effective constellation produced by the final demodulation stage being devoid of one or more points included in the modulation constellation.

摘要翻译： 通过经由解调级的序列对接收到的符号进行解调，基于调制星座发送的接收符号产生软比特值，每个解调阶段基于有效星座产生符号决定。 由非最终解调级使用的每个有效星座包括近似调制星座的区域的质心子集。 相邻的子集具有一个或多个公共点，使得至少两个相邻子集重叠。 用于符号判定的软比特值基于在解调期间计算的针对包括在解调级序列上递增地构成的有效星座中的点的检测度量来确定，由最终解调级产生的有效星座没有一个或多个点 包含在调制星座中。

公开(公告)号：US20110051851A1

公开(公告)日：2011-03-03

申请号：US12549132

申请日：2009-08-27

申请人： Ali S. Khayrallah

发明人： Ali S. Khayrallah

IPC分类号： H04L27/06

CPC分类号： H04L27/38 ,  H04L25/03229 ,  H04L27/3416 ,  H04L2025/03388 ,  H04L2025/0342 ,  H04L2025/03426

摘要： A receiver includes a constellation processing module and a plurality of demodulation stages. The constellation processing module groups points of a constellation associated with a transmitted signal into a plurality of subsets, were at least two adjacent ones of the subsets have one or more common constellation points so that the at least two adjacent subsets overlap. The constellation processing module also determines a centroid-based value for each of the subsets of constellation points and groups the centroid-based values into one or more sets. Each of the demodulation stages except for the last demodulation stage localizes a search for a final symbol decision using the set of centroid-based values input to or selected by the demodulation stage as constellation points. The last demodulation stage determines the final symbol decision using the subset of constellation points input to or selected by the last demodulation stage.

摘要翻译： 接收机包括星座处理模块和多个解调级。 星座处理模块将与发射信号相关联的星座的点分组成多个子集，至少两个相邻子集具有一个或多个公共星座点，使得至少两个相邻子集重叠。 星座处理模块还确定每个星座点子集的基于质心的值，并将基于质心的值分组成一个或多个集合。 除了最后一个解调级之外的每个解调级使用输入到解调级或由解调级选择的基于质心的值的集合来定位对最终符号判定的搜索作为星座点。 最后一个解调阶段使用输入到或由最后一个解调阶段选择的星座点的子集来确定最终符号决定。

公开(公告)号：US20100142637A1

公开(公告)日：2010-06-10

申请号：US12630167

申请日：2009-12-03

申请人： Junqiang Hu ,  Dung-Huy Han ,  Ting Wang

发明人： Junqiang Hu ,  Dung-Huy Han ,  Ting Wang

IPC分类号： H04L27/28 ,  H04L27/00

CPC分类号： H04L27/2649 ,  H04L25/0307 ,  H04L25/03159 ,  H04L27/223 ,  H04L27/2697 ,  H04L2025/03388 ,  H04L2025/03414

摘要： A method by an optical OFDM receiver includes converting a received optical signal to an electrical signal, deriving a digital signal from the electrical signal, and emulating, with an iterative OFDM demodulator responsive to the digital signal, a transmitter effect in the received signal of lower peak clipping and top peak distortion and applying the transmitter effect to the received signal and a decision-made signal for estimating an error function to be applied to a demodulation of the received optical signal.

摘要翻译： 光OFDM接收机的方法包括将接收到的光信号转换为电信号，从电信号导出数字信号，并用响应于数字信号的迭代OFDM解调器仿真接收信号中的发射机效应较低 峰值限幅和顶峰失真，并将发送器效应应用于接收信号，以及用于估计要应用于所接收的光信号的解调的误差函数的决定信号。

公开(公告)号：US20070030891A1

公开(公告)日：2007-02-08

申请号：US11485297

申请日：2006-07-13

申请人： Bernd Franz

发明人： Bernd Franz

IPC分类号： H03H7/30

CPC分类号： H04L1/20 ,  H04B10/66 ,  H04L25/03057 ,  H04L2025/03388 ,  H04L2025/03726

摘要： A receiver for an optical signal is described. The receiver comprises a decision feedback equalizer (DFE), wherein a distorted input signal (DIS) being derived from the optical signal, as well as a first threshold signal (Th1) and/or a first coefficient (Coeff1) are provided to the decision feedback equalizer (DFE), and wherein an error signal (ES1) is provided by the decision feedback equalizer (DFE). The receiver comprises a control unit (CU), wherein the error signal (ES1) is provided to the control unit (CU), and wherein the first threshold signal (Th1) and/or the first coefficient (Coeff1) are adapted by the control unit (CU). The receiver comprises an eye monitor (EM) for optimizing the adapted first threshold signal (Th1) and/or the adapted first coefficient (Coeff1), wherein the distorted input signal (DIS) is provided to the eye monitor (EM).

摘要翻译： 描述了用于光信号的接收机。 接收机包括判决反馈均衡器（DFE），其中从光信号导出的失真输入信号（DIS）以及第一阈值信号（Th 1）和/或第一系数（Coeff 1）被提供给 所述判决反馈均衡器（DFE），并且其中由所述判决反馈均衡器（DFE）提供误差信号（ES 1）。 接收机包括控制单元（CU），其中误差信号（ES 1）被提供给控制单元（CU），并且其中第一阈值信号（Th 1）和/或第一系数（Coeff 1）被适配 通过控制单元（CU）。 接收机包括用于优化适配的第一阈值信号（Th 1）和/或适配的第一系数（Coeff 1）的眼睛监视器（EM），其中将失真的输入信号（DIS）提供给眼睛监视器（EM）。

公开(公告)号：US06665336B2

公开(公告)日：2003-12-16

申请号：US10428357

申请日：2003-05-02

申请人： Youssef Abdelilah ,  Gordon Taylor Davis ,  Jeffrey Haskell Derby ,  Ajay Dholakia ,  Evangelos Stavros Eleftheriou ,  Dongming Hwang ,  Fredy D. Neeser ,  Malcolm Scott Ware ,  Hua Ye

发明人： Youssef Abdelilah ,  Gordon Taylor Davis ,  Jeffrey Haskell Derby ,  Ajay Dholakia ,  Evangelos Stavros Eleftheriou ,  Dongming Hwang ,  Fredy D. Neeser ,  Malcolm Scott Ware ,  Hua Ye

IPC分类号： H04B1700

CPC分类号： H04L1/0021 ,  H04L1/0002 ,  H04L25/03057 ,  H04L25/4927 ,  H04L2025/03388 ,  Y02D50/10

摘要： Modems, methods, and computer program products select a data rate based on error signals in a modem. In an illustrative embodiment, error signals representing the difference between an output of an equalizer and an output of a detector are accumulated and an average error value is computed therefrom. A signal to noise ratio is determined using the average error value. The signal to noise ratio is then used to select a data rate. In another illustrative embodiment, the mean squared error at the output of the equalizer is determined and then used, along with the probability of error in correctly detecting a symbol, to select a data rate. Incorrect decisions in detecting received data symbols can cause a catastrophic failure in a decision feedback equalizer used in a modem receiver as errors are repeatedly fed back causing the tap coefficients for the equalizer filters to be shifted from their normal operating values. By adjusting the data rate in accordance with the error signals generated in a modem receiver, the decision feedback equalizer can operate with greater stability as the data rate can be reduced in response to increased noise conditions.

摘要翻译： 调制解调器，方法和计算机程序产品根据调制解调器中的错误信号选择数据速率。 在说明性实施例中，代表均衡器的输出和检测器的输出之间的差的误差信号被累加，并且从其计算出平均误差值。 使用平均误差值确定信噪比。 然后使用信噪比来选择数据速率。 在另一说明性实施例中，确定均衡器的输出处的均方误差，然后与正确检测符号的误差概率一起使用以选择数据速率。 检测接收到的数据符号时的不正确决定可能导致在调制解调器接收机中使用的判决反馈均衡器中的灾难性故障，因为错误被反复反馈，导致均衡器滤波器的抽头系数从其正常操作值偏移。 通过根据在调制解调器接收机中产生的误差信号来调整数据速率，当响应于增加的噪声条件可以减小数据速率时，判决反馈均衡器可以更稳定地工作。

公开(公告)号：US20030112370A1

公开(公告)日：2003-06-19

申请号：US10246084

申请日：2002-09-18

发明人： Chris Long ,  Thomas J. Endres ,  Walt Ciciora ,  Ted E. Hartson

IPC分类号： H04N007/084

CPC分类号： H04N7/08 ,  H04L2025/03388 ,  H04L2025/0342 ,  H04L2025/0349 ,  H04L2025/03617 ,  H04L2025/0363 ,  H04L2027/003 ,  H04L2027/0055

摘要： Methods and systems for effectuating simultaneous transmission of a standard analog television video signal and a data signal. A transmitter system comprises an analog video signal path and a data signal path. The data signal path produces a data signal that is added to, combined with, or otherwise imposed on the video signal, so as to be substantially in quadrature with the video signal as sensed by television receivers in the broadcast region. An abatement signal is generated and applied to the video signal in order to correct for effects of the data on the video signal. The abatement signal is generated based on feedback control metric signals obtained from receiver emulation which uses as input a signal corresponding to the television signal as transmitted. The feedback control metric signals can also used to control the modulation of the data, for example, by adjusting the interpolation of the data based on the amplitude and frequency responses of the data signal. The transmitter system also comprises a subsystem which produces phase and amplitude correction signals for compensating for non-linear distortions in the transmitter system. The metrics can also be used in combination with a reference path to control timing of the data signal as applied to the video signal for output to the transmitter. Receivers according to various embodiments of the present invention separate the data from the video signal, do appropriate processing on the data signal in order to extract and recover the data, and forward the data for output. Such receivers can also include or contain, if desired, output to television receivers for rendering television programming.

摘要翻译： 用于实现标准模拟电视视频信号和数据信号的同时传输的方法和系统。 发射机系统包括模拟视频信号路径和数据信号路径。 数据信号路径产生一个数字信号，该数据信号被添加到视频信号上，或加到视频信号上，或以其他方式施加在视频信号上，以便与由广播区域中的电视接收机感测到的视频信号基本成正交。 产生消除信号并将其应用于视频信号，以便校正数据对视频信号的影响。 基于从接收机仿真获得的反馈控制度量信号产生消减信号，该接收机仿真使用与发送的电视信号相对应的信号作为输入。 反馈控制度量信号也可以用于控制数据的调制，例如通过基于数据信号的幅度和频率响应调整数据的内插。 发射机系统还包括产生用于补偿发射机系统中的非线性失真的相位和振幅校正信号的子系统。 度量还可以与参考路径组合使用，以控制应用于视频信号的数据信号的定时以输出到发射机。 根据本发明的各种实施例的接收机将数据与视频信号分开，对数据信号进行适当处理，以便提取和恢复数据，并转发数据进行输出。 如果需要，这样的接收机还可以包括或包含用于电视节目的电视接收机的输出。

公开(公告)号：US20160197761A1

公开(公告)日：2016-07-07

申请号：US14873086

申请日：2015-10-01

申请人： THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

发明人： Mau-Chung Chang ,  Sai-Wang Tam ,  Gyung-Su Byun ,  Yanghyo Kim ,  Kanit Therdsteerasukdi ,  Jeremy Ir ,  Glenn Reinman ,  Jingsheng Cong

IPC分类号： H04L27/34

CPC分类号： H04L27/3483 ,  G06F15/7842 ,  G06F2213/0038 ,  G11C5/063 ,  G11C7/10 ,  G11C7/1057 ,  G11C7/1084 ,  H04L25/0274 ,  H04L27/04 ,  H04L45/60 ,  H04L2025/03388

摘要： Systems, apparatus, modules, and methods of communicating with memory devices utilizing multi-band communication containing a baseband and one or more amplitude shift keyed (ASK) RF channels over each differential pair of off-chip transmission lines. Configurations are described for interfacing between microprocessors, or controllers and memory devices or modules, and within a DIMM and its DRAM devices, and between multiple DIMM memory modules.

摘要翻译： 使用包含基带和一个或多个幅移键控（ASK）RF信道的多频带通信的存储器件进行通信的系统，装置，模块和方法，每个差分对的芯片外传输线。 描述了用于在微处理器或控制器和存储设备或模块之间以及在DIMM及其DRAM设备内以及在多个DIMM存储器模块之间进行接口的配置。