公开(公告)号：US06707868B1

公开(公告)日：2004-03-16

申请号：US09291136

申请日：1999-04-12

申请人： John R. Camagna ,  James Ward Girardeau, Jr. ,  Stanley K. Ling ,  Hiroshi Takatori

发明人： John R. Camagna ,  James Ward Girardeau, Jr. ,  Stanley K. Ling ,  Hiroshi Takatori

IPC分类号： H04L700

CPC分类号： H04L7/0058 ,  H04L25/0202 ,  H04L2025/03471

摘要： A digital timing recovery system wherein the rate conversion is independent of the sampling rate, and which may be set in a network mode or a remote mode. The invention includes a transceiver core for processing transmit and receive data at a predetermined baud rate, an analog front end for transmitting and receiving analog signals over a network, a phase detector for generating a phase error estimate and a timing controller for receiving the phase error estimate signal and generating a receive and transmit phase control signal for controlling timing of the analog front end. A selector is provided for selecting a remote mode of operation or a network mode of operation. The analog front end further includes a transmit converter for converting the transmit data at the baud rate to a digital output at a transmit rate and a digital to analog converter for converting the digital output to an analog signal, and an analog to digital converter for converting the analog receive signal to a digital receive signal and a receive converter for converting the digital receive signal at a receive rate to the baud rate. The phase detector includes a channel estimator for generating a coefficient error signal and the timing controller includes a loop filter for producing a control signal for a numerically controlled oscillator that produces a baud interrupt signal and the phase control signals.

摘要翻译： 数字定时恢复系统，其中速率转换独立于采样速率，并且其可以被设置在网络模式或远程模式中。 本发明包括用于以预定波特率处理发送和接收数据的收发机核心，用于通过网络发送和接收模拟信号的模拟前端，用于产生相位误差估计的相位检测器和用于接收相位误差的定时控制器 估计信号并产生用于控制模拟前端的定时的接收和发送相位控制信号。 提供选择器用于选择远程操作模式或网络操作模式。 模拟前端还包括发送转换器，用于将波特率的发送数据以发送速率转换为数字输出，以及用于将数字输出转换为模拟信号的数模转换器，以及用于转换的模数转换器 到数字接收信号的模拟接收信号和用于以接收速率将数字接收信号转换成波特率的接收转换器。 相位检测器包括用于产生系数误差信号的信道估计器，并且定时控制器包括用于产生用于产生波特率中断信号和相位控制信号的数控振荡器的控制信号的环路滤波器。

公开(公告)号：US06249557B1

公开(公告)日：2001-06-19

申请号：US09033769

申请日：1998-03-03

申请人： Hiroshi Takatori ,  Stanley K. Ling ,  Amit Gattani ,  John R. Camagna

发明人： Hiroshi Takatori ,  Stanley K. Ling ,  Amit Gattani ,  John R. Camagna

IPC分类号： H04L700

CPC分类号： H04L7/0058 ,  H04L7/0062 ,  H04L7/0083

摘要： A timing recovery circuit is disclosed that prevents phase error over-compensation. The timing recovery circuit includes a phase scanner for determining when phase error over-compensation has occurred and generating a signal for preventing dual phase compensation in response thereto thereby providing an accurate recovered clock signal. The timing recovery circuit also includes a feed-forward equalizer having a plurality of taps providing coefficients for filtering and adapting the input timing recovery circuit to an input signal. The phase scanner compares the tap coefficients to generate signal for preventing phase over-compensation by the feed-forward equalizer. A phase detector is provided for sampling coefficients from the feed-forward equalizer, error signals and output data and generating a phase signal used to generating the recovered clock signal. The signal for preventing phase over-compensation is mixed with the phase signal to generate the recovered clock signal.

摘要翻译： 公开了一种防止相位误差过度补偿的定时恢复电路。 定时恢复电路包括用于确定何时发生相位误差过补偿的相位扫描器，并且响应于此产生用于防止双相补偿的信号，从而提供精确的恢复时钟信号。 定时恢复电路还包括具有多个抽头的前馈均衡器，其提供用于滤波和适配输入定时恢复电路到输入信号的系数。 相位扫描器比较抽头系数以产生用于防止前馈均衡器的相位过补偿的信号。 提供相位检测器用于从前馈均衡器，误差信号和输出数据中采样系数，并产生用于产生恢复的时钟信号的相位信号。 用于防止相位过度补偿的信号与相位信号混合以产生恢复的时钟信号。

公开(公告)号：US06665337B1

公开(公告)日：2003-12-16

申请号：US09281860

申请日：1999-03-31

申请人： James Ward Girardeau, Jr. ,  Hiroshi Takatori

发明人： James Ward Girardeau, Jr. ,  Hiroshi Takatori

IPC分类号： H03H730

CPC分类号： H04L25/03019 ,  H04L2025/03745

摘要： An activation method for an adaptive equalization in a data transceiver having at least one adaptive filter for adaptive equalization of received sample signals, includes pre-loading a fixed set of coefficients on the at least one adaptive filter in initial activation of the data transceiver. The pre-loaded adaptive filter is allowed to adapt immediately after the activation of the data transceiver. Alternatively, the pre-loaded adaptive filter is allowed to adapt after the activation of the data transceiver and a period of time thereafter. The received timing and/or signals are recovered.

摘要翻译： 一种用于具有至少一个自适应滤波器的数据收发器中的自适应均衡的激活方法，用于对所接收的采样信号进行自适应均衡，包括在数据收发器的初始激活中对所述至少一个自适应滤波器预先固定的一组系数。 允许预加载自适应滤波器在数据收发器激活之后立即进行调整。 或者，允许预加载的自适应滤波器在数据收发器的激活之后适应一段时间。 接收的定时和/或信号被恢复。

公开(公告)号：US6134570A

公开(公告)日：2000-10-17

申请号：US75641

申请日：1998-05-11

申请人： John R. Camagna ,  Hiroshi Takatori ,  Ping An

发明人： John R. Camagna ,  Hiroshi Takatori ,  Ping An

IPC分类号： H03H21/00 ,  G06F17/10

CPC分类号： H03H21/0012

摘要： An efficient implementation of a multirate filter with delayed error feedback prevents an instruction processing rate requirement from increasing by performing interpolation and decimation in a LMS filter element at the same time. The multirate filter calculates an ith coefficient value, wherein i is a set of consecutive integers, by obtaining an (i-1)th error value, obtaining an (i-1)th data value, multiplying the (i-1)th error value and the (i-1)th data value to obtain an ith coefficient product, obtaining Mth coefficient value from a coefficient register, wherein M is a predetermined integer, adding the Mth coefficient value to the ith coefficient product to obtain an ith coefficient value calculating an ith data value by multiplying the (i-1)th data value and the Mth coefficient value to produce ith convolution product, and adding an (i-1)th convolution sum to the ith convolution product to produce an ith convolution sum. Obtaining of the Mth coefficient value decimates the convolution product by M and interpolates the error value by M. Obtaining of the (i-1)th data value further includes incrementing a data register by one when new data is not written into the data register.

摘要翻译： 具有延迟误差反馈的多速率滤波器的有效实现通过在LMS滤波器元件中同时执行插值和抽取来防止指令处理速率要求增加。 多速率滤波器通过获得第（i-1）个误差值来计算第i个系数值，其中i是一组连续整数，获得第（i-1）个数据值，乘以第（i-1）个误差 值和第（i-1）个数据值以获得第i个系数乘积，从系数寄存器获得Mth系数值，其中M是预定整数，将第M个系数值与第i个系数乘积相加以获得第i个系数值 通过将第（i-1）个数据值和第M个系数值相乘以产生第i个卷积积来计算第i个数据值，并将第（i-1）个卷积和加到第i个卷积乘积以产生第i个卷积和。 获取第M个系数值将卷积乘除M，并将误差值内插。（i-1）数据值的获取还包括当新数据未写入数据寄存器时将数据寄存器递增1。

公开(公告)号：US06865588B2

公开(公告)日：2005-03-08

申请号：US10037656

申请日：2002-01-03

申请人： Stanley K. Ling ,  Hiroshi Takatori

发明人： Stanley K. Ling ,  Hiroshi Takatori

IPC分类号： H04L25/03 ,  G06F17/10

CPC分类号： H04L25/03038 ,  H04L2025/03477 ,  H04L2025/03617 ,  H04L2025/03681

摘要： In one embodiment of the invention, a tap-leakage generator includes an error filter and an updater. The error filter filters a decision error provided by the adaptive filter using a leakage factor. The adaptive filter has N taps. The updater updates N equalizer coefficients to the N taps using the filtered decision error. The updater receives N equalizer data from the N taps.

摘要翻译： 在本发明的一个实施例中，抽头泄漏发生器包括错误滤波器和更新器。 误差滤波器使用泄漏因子滤除由自适应滤波器提供的判决误差。 自适应滤波器具有N个抽头。 更新器使用滤波的决策误差将N个均衡器系数更新为N个抽头。 更新器从N个抽头接收N个均衡器数据。

公开(公告)号：US6167082A

公开(公告)日：2000-12-26

申请号：US33770

申请日：1998-03-03

申请人： Stanley K. Ling ,  Ping An ,  Hiroshi Takatori

发明人： Stanley K. Ling ,  Ping An ,  Hiroshi Takatori

IPC分类号： H04L25/03 ,  H03K5/159 ,  H03H5/00

CPC分类号： H04L25/4975 ,  H04L25/03057 ,  H04L25/03343 ,  H04L2025/037

摘要： Adaptive equalization methods and adaptive equalizers used with precoded systems dominated by intersymbol interference (ISI) monitor the output of a DFE and compare it to a reference for updating a precoder in response to the comparison. To accomplish this, an adaptive equalizer includes a feed forward equalizer receiving a signal from a communication channel, the feed forward equalizer equalizing variations in pre-cursor intersymbol interference resulting from changes in characteristics of the channel and providing an output signal to an error correction decoder, a decision circuit, coupled to the feed forward equalizer, for generating error vectors in response to the output signal of the feed forward equalizer and a decision feedback equalizer, coupled to the decision circuit, the decision feedback equalizer monitoring the pre-cursor intersymbol interference of the channel, determining when the transmitter coefficients to the precoder warrant updating, and generating a signal indicating that an update to the transmitter coefficients to the precoder is warranted. The adaptive equalizer farther includes a comparison circuit, the comparison circuit receiving an output from the decision feedback equalizer and comparing the output from the decision feedback equalizer to a reference, the comparison circuit generating the signal indicating that an update to the transmitter coefficients to the precoder is warranted in response to the comparison.

摘要翻译： 与由符号间干扰（ISI）支配的预编码系统一起使用的自适应均衡方法和自适应均衡器监视DFE的输出，并将其与用于响应于比较更新预编码器的参考进行比较。 为了实现这一点，自适应均衡器包括接收来自通信信道的信号的前馈均衡器，前馈均衡器均衡由信道特性变化引起的前置符号间干扰的变化，并向纠错解码器提供输出信号 耦合到所述前馈均衡器的响应于所述前馈均衡器的输出信号的误差向量的决定电路和耦合到所述判定电路的判决反馈均衡器，所述判决反馈均衡器监视所述前标符号间干扰 确定到预编码器的发射机系数何时更新，并且产生指示对预编码器对发射机系数的更新的信号是有必要的。 所述自适应均衡器还包括比较电路，所述比较电路接收所述判决反馈均衡器的输出，并将所述判决反馈均衡器的输出与参考值进行比较，所述比较电路产生指示对所述预编码器对所述发射机系数的更新的信号 有必要回应比较。

公开(公告)号：US07006564B2

公开(公告)日：2006-02-28

申请号：US09930757

申请日：2001-08-15

申请人： Stanley K. Ling ,  Hiroshi Takatori

发明人： Stanley K. Ling ,  Hiroshi Takatori

IPC分类号： H03K5/159

CPC分类号： H04L25/03057 ,  H03H21/0012 ,  H04L2025/0349 ,  H04L2025/03617

摘要： An adaptive equalizer processes an input signal that includes noise, pre-cursor intersymbol interference, and post-cursor intersymbol interference. The adaptive equalizer includes a feedforward filter which reduces the pre-cursor intersymbol interference and whitens the noise, a feedback filter which detects the post-cursor intersymbol interference in a signal that corresponds to the input signal, and circuitry which removes the detected post-cursor intersymbol interference from the input signal. The feedforward filter includes separate first and second coefficients. The first coefficients reduce the pre-cursor intersymbol interference and the second coefficients whiten the noise.

公开(公告)号：US08827491B2

公开(公告)日：2014-09-09

申请号：US13809744

申请日：2011-07-13

申请人： Hiroshi Takatori ,  Akinobu Seki ,  Noriyuki Kawahara

发明人： Hiroshi Takatori ,  Akinobu Seki ,  Noriyuki Kawahara

IPC分类号： F21V7/00 ,  F21V5/04 ,  G02B3/08 ,  F21S2/00 ,  F21Y101/02

CPC分类号： F21V7/0083 ,  F21S2/005 ,  F21V5/04 ,  F21V7/0091 ,  F21Y2115/10 ,  G02B3/08

摘要： A lighting device preventing an illumination variation on a surface to be irradiated. The lighting device has a first light emitting surface section (102a) which is a surface formed by rotating a bus with a central axis as a rotation axis in a first angle area (−θ1≦θ≦θ1) of an angle (θ) relative to a cross section of the bus which is an intersection line with the cross section perpendicular to a surface (801a) to be irradiated and including the central axis of a lighting lens (100), a second light emitting surface section (102b) formed in a second angle area (θ1≦θ≦180° and −180°≦θ≦−θ1) of the angle (θ) so that a light flux emitted toward the surface (801a) increases as compared with the case where the first light emitting surface section (102a) is formed in a whole-angle area (0°≦θ

摘要翻译： 一种防止被照射表面上的照明变化的照明装置。 照明装置具有第一发光表面部分（102a），该第一发光表面部分（102a）是通过使第一角度区域（ - ＆lt;＆lt; 1＆nlE;＆thetas;＆nlE;＆amp; thetas; 1）中的旋转轴线的中心轴线的总线旋转而形成的表面 相对于总线的横截面的角度（θ），其是与要照射的表面（801a）垂直的横截面的交点，并且包括照明透镜（100）的中心轴，第二发光 表面部分（102b）形成在角度（θ）的第二角度区域（θ; 1＆nlE;＆amp;;;; n1E; 180°和-180°＆nlE;; thetas; 1）中， 与第一发光面部（102a）形成在发光面部（102）上的全角度区域（0°＆lt; 1 |θ3; 360°）的情况相比，朝向表面（801a） 由第一发光表面部分（102a）和第二发光表面部分（102a）之间的步骤形成的第三发光表面部分（102c） d发光面部（102b）。

公开(公告)号：US20120076195A1

公开(公告)日：2012-03-29

申请号：US13312273

申请日：2011-12-06

申请人： Mark Joseph Callicotte ,  Hiroshi Takatori

发明人： Mark Joseph Callicotte ,  Hiroshi Takatori

IPC分类号： H03H7/30

CPC分类号： H03H21/0067 ,  H03H21/0001 ,  H03H21/0012

摘要： An adaptive transversal filter having tap weights Wj which are products of corresponding tap coefficients Cj and tap gains Mj is provided. A filter control loop controls all of the tap coefficients Cj such that an error signal derived from the filter output is minimized. One or more tap control loops controls a tap gain Mk such that the corresponding tap coefficient Ck satisfies a predetermined control condition. For example, |Ck| can be maximized subject to a constraint |Ck| Cmax, where Cmax is a predetermined maximum coefficient value. In this manner, the effect of quantization noise on the coefficients Cj can be reduced. Multiple tap control loops can be employed, one for each tap. Alternatively, a single tap control loop can be used to control multiple taps by time interleaving.

摘要翻译： 提供具有作为对应抽头系数Cj和抽头增益Mj的乘积的抽头权重Wj的自适应横向滤波器。 滤波器控制环控制所有抽头系数Cj，使得从滤波器输出得到的误差信号最小化。 一个或多个抽头控制回路控制抽头增益Mk使得对应的抽头系数Ck满足预定的控制条件。 例如| Ck | 可以最大限度地受限于| Ck | Cmax，其中Cmax是预定的最大系数值。 以这种方式，可以减小量化噪声对系数Cj的影响。 可以采用多个抽头控制回路，每个抽头一个。 或者，可以使用单抽头控制回路来通过时间交织来控制多个抽头。

公开(公告)号：US20090290622A1

公开(公告)日：2009-11-26

申请号：US12534643

申请日：2009-08-03

申请人： Hiroshi Takatori ,  Kenneth C. Dyer ,  Mark Callicotte

发明人： Hiroshi Takatori ,  Kenneth C. Dyer ,  Mark Callicotte

IPC分类号： H04B1/38

CPC分类号： H04B3/32 ,  H04B1/58

摘要： The present invention effectively cancels echo, near-end crosstalk and far-end crosstalk. A FEXT canceller is placed at the transmitter rather than at the receiver according to an aspect of the invention. In some embodiment, a FEXT canceller can be placed at the receiver only or the combination of both ends. The FEXT canceller is continuously adapted with information sent back from a remote receiver and with data from a neighbor transmitter that causes the crosstalk at the remote receiver. This allows the FEXT canceller to quickly adapt to a change in crosstalk function or conditions with the surrounding environment, for example, aging, temperature, humidity, physical pressure, etc. In some embodiments, an adaptation control signal is sent back from the receiver to the transmitter by using an overhead bit in the frame format. In some embodiments, part of the FEXT canceller is built-in at the remote receiver.

摘要翻译： 本发明有效地消除了回波，近端串扰和远端串扰。 根据本发明的一个方面，FEXT消除器被放置在发射器而不是接收器处。 在一些实施例中，FEXT消除器可以仅放置在接收器处或两端的组合。 FEXT消除器连续地适应从远程接收器发回的信息和来自邻近发射机的数据，这些数据导致远端接收机的串扰。 这允许FEXT消除器快速适应与周围环境（例如老化，温度，湿度，物理压力等）的串扰功能或条件的变化。在一些实施例中，自适应控制信号从接收器发送回 发送器通过使用帧格式的开销位。 在一些实施例中，FEXT消除器的一部分内置在远程接收器中。