专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US08705672B2 Method of compensating for nonlinearity in a DFE-based receiver 有权
标题翻译：在基于DFE的接收机中补偿非线性的方法
公开(公告)号：US08705672B2
公开(公告)日：2014-04-22
申请号：US13244985
申请日：2011-09-26
申请人： Amaresh Malipatil , Mohammad Mobin , Pervez Aziz , Ye Liu
发明人： Amaresh Malipatil , Mohammad Mobin , Pervez Aziz , Ye Liu
IPC分类号： H04L27/08
CPC分类号： H04L25/03019 , H04L2025/03681 , H04L2025/037
摘要： A receiver has an input and a decision feedback equalizer (DFE). The DFE couples to the receiver input and has at least one tap coefficient. An input signal, having a first amplitude level insufficient to cause significant non-linear distortion in the receiver, is applied to the receiver input. After the DFE adapts to the applied input signal having the first amplitude level by adjusting the at least one tap coefficient, the adaptation process is stopped. Then the at least one tap coefficient is scaled by a factor α and the amplitude of input signal is adjusted to a second amplitude level greater than the first amplitude level by the scale factor α. Although the second amplitude level might be sufficient to cause significant non-linear distortion in the receiver, the scaled tap coefficient has the correct values for proper DFE operation in the presence of the non-linear distortion.
摘要翻译：接收机具有输入和判决反馈均衡器（DFE）。 DFE耦合到接收器输入，并具有至少一个抽头系数。具有不足以在接收机中引起显着的非线性失真的具有第一幅度电平的输入信号被施加到接收器输入端。在DFE通过调整至少一个抽头系数来适应具有第一幅度电平的所施加的输入信号之后，停止适配处理。然后，通过因子α对至少一个抽头系数进行缩放，并且将输入信号的幅度调整到大于第一幅度电平的比例因子α的第二幅度电平。虽然第二幅度电平可能足以在接收机中引起显着的非线性失真，但是在存在非线性失真的情况下，经缩放的抽头系数具有适当的DFE操作的正确值。

2. 发明申请

US20130077669A1 Method of Compensating for Nonlinearity in a DFE-based Receiver 有权
标题翻译：在基于DFE的接收机中补偿非线性的方法
公开(公告)号：US20130077669A1
公开(公告)日：2013-03-28
申请号：US13244985
申请日：2011-09-26
申请人： Amaresh Malipatil , Mohammad Mobin , Pervez Aziz , Ye Liu
发明人： Amaresh Malipatil , Mohammad Mobin , Pervez Aziz , Ye Liu
IPC分类号： H04L27/01
CPC分类号： H04L25/03019 , H04L2025/03681 , H04L2025/037
摘要： A receiver has an input and a decision feedback equalizer (DFE). The DFE couples to the receiver input and has at least one tap coefficient. An input signal, having a first amplitude level insufficient to cause significant non-linear distortion in the receiver, is applied to the receiver input. After the DFE adapts to the applied input signal having the first amplitude level by adjusting the at least one tap coefficient, the adaptation process is stopped. Then the at least one tap coefficient is scaled by a factor α and the amplitude of input signal is adjusted to a second amplitude level greater than the first amplitude level by the scale factor α. Although the second amplitude level might be sufficient to cause significant non-linear distortion in the receiver, the scaled tap coefficient has the correct values for proper DFE operation in the presence of the non-linear distortion.
摘要翻译：接收机具有输入和判决反馈均衡器（DFE）。 DFE耦合到接收器输入，并具有至少一个抽头系数。具有不足以在接收机中引起显着的非线性失真的具有第一幅度电平的输入信号被施加到接收器输入端。在DFE通过调整至少一个抽头系数来适应具有第一幅度电平的所施加的输入信号之后，停止适配处理。然后，通过因子α对至少一个抽头系数进行缩放，并且将输入信号的幅度调整到大于第一幅度电平的比例因子α的第二幅度电平。虽然第二幅度电平可能足以在接收机中引起显着的非线性失真，但是在存在非线性失真的情况下，经缩放的抽头系数具有适当的DFE操作的正确值。

3. 发明申请

US20130287088A1 Receiver Having Limiter-Enhanced Data Eye Openings 有权
标题翻译：接收机具有限制增强数据眼图
公开(公告)号：US20130287088A1
公开(公告)日：2013-10-31
申请号：US13459871
申请日：2012-04-30
申请人： Mohammad Mobin , Pervez Aziz , Ye Liu
发明人： Mohammad Mobin , Pervez Aziz , Ye Liu
IPC分类号： H04L27/01 , H04L27/06
CPC分类号： H04L25/03057 , H04L7/10 , H04L25/03063 , H04L27/0002 , H04L2025/03636
摘要： A communication system having a receiver with a linear path and a nonlinear path. As the receiver receives a data signal, it adaptively equalizes the received signal, and amplitude-limits the equalized signal in the nonlinear path using a saturable amplifier limiter or the like. A slicer extracts data from the limited equalized received signal. In the linear path, a clock recovery circuit generates a clock signal from the equalized received signal. A delay circuit in the linear path at least partially compensates for propagation delay in the limiter. Having the clock recovery occur in other than the nonlinear path, a low jitter clock is generated. The limiter enhances the vertical opening of the data eye by increasing the rise and fall times of the limited signal, providing more noise margin for the slicer to operate with and a greater timing margin in which to sample the sliced data.
摘要翻译：一种具有线性路径和非线性路径的接收机的通信系统。随着接收机接收数据信号，它自适应地均衡接收信号，并且使用可饱和放大器限幅器等对非线性路径中的均衡信号进行幅度限幅。限幅器从有限的均衡接收信号中提取数据。在线性路径中，时钟恢复电路从均衡的接收信号产生时钟信号。线性路径中的延迟电路至少部分地补偿限幅器中的传播延迟。在非线性路径之外发生时钟恢复，产生低抖动时钟。限幅器通过增加受限信号的上升和下降时间来增强数据眼睛的垂直开度，为切片机操作提供更多的噪声容限以及更大的定时裕度来采样分片数据。

4. 发明授权

US08737549B2 Receiver having limiter-enhanced data eye openings 有权
标题翻译：接收机具有限制器增强的数据眼睛开口
公开(公告)号：US08737549B2
公开(公告)日：2014-05-27
申请号：US13459871
申请日：2012-04-30
申请人： Mohammad Mobin , Pervez Aziz , Ye Liu
发明人： Mohammad Mobin , Pervez Aziz , Ye Liu
IPC分类号： H03K5/01
CPC分类号： H04L25/03057 , H04L7/10 , H04L25/03063 , H04L27/0002 , H04L2025/03636
摘要： A communication system having a receiver with a linear path and a nonlinear path. As the receiver receives a data signal, it adaptively equalizes the received signal, and amplitude-limits the equalized signal in the nonlinear path using a saturable amplifier limiter or the like. A slicer extracts data from the limited equalized received signal. In the linear path, a clock recovery circuit generates a clock signal from the equalized received signal. A delay circuit in the linear path at least partially compensates for propagation delay in the limiter. Having the clock recovery occur in other than the nonlinear path, a low jitter clock is generated. The limiter enhances the vertical opening of the data eye by increasing the rise and fall times of the limited signal, providing more noise margin for the slicer to operate with and a greater timing margin in which to sample the sliced data.
摘要翻译：一种具有线性路径和非线性路径的接收机的通信系统。随着接收机接收数据信号，它自适应地均衡接收信号，并且使用可饱和放大器限幅器等对非线性路径中的均衡信号进行幅度限幅。限幅器从有限的均衡接收信号中提取数据。在线性路径中，时钟恢复电路从均衡的接收信号产生时钟信号。线性路径中的延迟电路至少部分地补偿限幅器中的传播延迟。在非线性路径之外发生时钟恢复，产生低抖动时钟。限幅器通过增加受限信号的上升和下降时间来增强数据眼睛的垂直开度，为切片机操作提供更多的噪声容限，并在其中对切片数据进行采样提供更大的定时余量。

5. 发明授权

US08537885B2 Low-power down-sampled floating tap decision feedback equalization 有权
标题翻译：低功耗下采样浮点判定反馈均衡
公开(公告)号：US08537885B2
公开(公告)日：2013-09-17
申请号：US13410735
申请日：2012-03-02
申请人： Pervez Aziz , Hiroshi Kimura , Amaresh Malipatil
发明人： Pervez Aziz , Hiroshi Kimura , Amaresh Malipatil
IPC分类号： H03H7/30
CPC分类号： H04L25/03057 , H04L25/03885 , H04L25/14 , H04L2025/0349 , H04L2025/03579
摘要： In described embodiments, a variety of down-sampling techniques are employed to generate a more constrained set of floating-tap positions when compared to floating-tap Decision Feedback Equalization (DFE) architectures that allow unconstrained 1T resolution or separated floating-tap positions. Down-sampling is employed to constrain the floating-tap positions rather than positions occurring with 1T resolution or spacing. Two broad down-sampling techniques, phase pruning and phase amalgamation, are applied to a variety of exemplary DFE implementations. Although the tap positions are more constrained, the architectures select floating-tap positions containing dominant reflection inter-symbol interference (ISI) terms.
摘要翻译：在所描述的实施例中，当与允许无约束1T分辨率或分离的浮动抽头位置的浮动抽头判决反馈均衡（DFE）架构相比时，采用各种下采样技术来产生更受约束的浮动抽头位置集合。采用下采样来限制浮动位置，而不是以1T分辨率或间距发生的位置。两种广泛的下采样技术，相位修剪和相位合并，被应用于各种示例性DFE实现。虽然抽头位置更受约束，但架构选择包含主要反射符号间干扰（ISI）项的浮动抽头位置。

6. 发明申请

US20130039407A1 LOW-POWER DOWN-SAMPLED FLOATING TAP DECISION FEEDBACK EQUALIZATION 有权
标题翻译：低功耗下降采样波形判定反馈均衡
公开(公告)号：US20130039407A1
公开(公告)日：2013-02-14
申请号：US13410735
申请日：2012-03-02
申请人： Pervez Aziz , Hiroshi Kimura , Amaresh Malipatil
发明人： Pervez Aziz , Hiroshi Kimura , Amaresh Malipatil
IPC分类号： H03H7/30
CPC分类号： H04L25/03057 , H04L25/03885 , H04L25/14 , H04L2025/0349 , H04L2025/03579
摘要： In described embodiments, a variety of down-sampling techniques are employed to generate a more constrained set of floating-tap positions when compared to floating-tap Decision Feedback Equalization (DFE) architectures that allow unconstrained IT resolution or separated floating-tap positions. Down-sampling is employed to constrain the floating-tap positions rather than positions occurring with IT resolution or spacing. Two broad down-sampling techniques, phase pruning and phase amalgamation, are applied to a variety of exemplary DFE implementations. Although the tap positions are more constrained, the architectures select floating-tap positions containing dominant reflection inter-symbol interference (ISI) terms.
摘要翻译：在所描述的实施例中，当与允许无约束的IT分辨率或分离的浮动抽头位置的浮动抽头判决反馈均衡（DFE）架构相比时，采用各种下采样技术来生成更受约束的浮动抽头位置集合。采用下采样来限制浮动位置，而不是以IT分辨率或间距发生的位置。两种广泛的下采样技术，相位修剪和相位合并，被应用于各种示例性DFE实现。虽然抽头位置更受约束，但架构选择包含主要反射符号间干扰（ISI）项的浮动抽头位置。

7. 发明授权

US08731040B2 Adapting transfer functions of continuous-time equalizers 有权
标题翻译：适应连续时间均衡器的传递函数
公开(公告)号：US08731040B2
公开(公告)日：2014-05-20
申请号：US13231097
申请日：2011-09-13
申请人： Pervez Aziz , Amaresh Malipatil
发明人： Pervez Aziz , Amaresh Malipatil
IPC分类号： H03H7/30
CPC分类号： H04L25/03057 , H04L2025/03503 , H04L2025/03636 , H04L2025/037
摘要： Described embodiments provide a method of adjusting configurable parameters of at least one linear equalizer in a communication system. A transmitting device applies an input signal to a receiver. The at least one linear equalizer equalizes the input signal. A sampler generates one or more sampled values of the input signal. A data detector digitizes the sampled values of the input signal. At least one error detection module generates an error signal based on one or more of a plurality of sampled values of the input signal and a target value. An adaptation module determines a gradient signal based on a comparison of one or more of the plurality of sampled values of the input signal and one or more of the plurality of values of the error signal. The adaptation module adjusts a transfer function of the at least one linear equalizer based on the determined gradient signal.
摘要翻译：所描述的实施例提供了一种在通信系统中调整至少一个线性均衡器的可配置参数的方法。发送装置向接收机施加输入信号。至少一个线性均衡器使输入信号均衡。采样器产生输入信号的一个或多个采样值。数据检测器将输入信号的采样值数字化。至少一个错误检测模块基于输入信号的多个采样值和目标值中的一个或多个产生误差信号。适应模块基于输入信号的多个采样值中的一个或多个与误差信号的多个值中的一个或多个的比较来确定梯度信号。适配模块基于所确定的梯度信号调整至少一个线性均衡器的传递函数。

8. 发明申请

US20050078758A1 Method for training a transceiver for high speed communications 有权
标题翻译：用于训练用于高速通信的收发器的方法
公开(公告)号：US20050078758A1
公开(公告)日：2005-04-14
申请号：US10964056
申请日：2004-10-12
申请人： Pervez Aziz , Donald Laturell , Mohammad Mobin , Gregory Sheets , Lane Smith
发明人： Pervez Aziz , Donald Laturell , Mohammad Mobin , Gregory Sheets , Lane Smith
IPC分类号： G01R31/317 , H04B3/00 , H04B3/04 , H04L25/03
CPC分类号： G01R31/31715 , H04B3/04 , H04L25/03038 , H04L2025/03356 , H04L2025/03477 , H04L2025/03617
摘要： In training a SERDES, a Common Electrical Interface (CEI) training frame, having certain bits of information embedded therein, is transmitted over a path which comprises transmitter, channel, and receiver components. The present invention analyzes the resulting received signal and determines the effective aggregate channel impulse response of these three components. The invention then determines an estimate of the inverse of this aggregate channel and uses this determination to reduce distortions that have been introduced into a signal that has been transmitted over the path.
摘要翻译：在训练SERDES时，通过包含发射机，信道和接收机组件的路径发送具有嵌入其中的某些信息位的公共电接口（CEI）训练帧。本发明分析所得到的接收信号并确定这三个分量的有效总信道脉冲响应。然后，本发明确定该聚合信道的逆的估计，并且使用该确定来减少已经被引入到已经通过该路径传输的信号中的失真。

9. 发明申请

US20120076181A1 ADAPTING TRANSFER FUNCTIONS OF CONTINUOUS-TIME EQUALIZERS 有权
标题翻译：适应连续均衡器的传递函数
公开(公告)号：US20120076181A1
公开(公告)日：2012-03-29
申请号：US13231097
申请日：2011-09-13
申请人： Pervez Aziz , Amaresh Malipatill
发明人： Pervez Aziz , Amaresh Malipatill
IPC分类号： H04L27/01 , H04B1/38
CPC分类号： H04L25/03057 , H04L2025/03503 , H04L2025/03636 , H04L2025/037
摘要： Described embodiments provide a method of adjusting configurable parameters of at least one linear equalizer in a communication system. A transmitting device applies an input signal to a receiver. The at least one linear equalizer equalizes the input signal. A sampler generates one or more sampled values of the input signal. A data detector digitizes the sampled values of the input signal. At least one error detection module generates an error signal based on one or more of a plurality of sampled values of the input signal and a target value. An adaptation module determines a gradient signal based on a comparison of one or more of the plurality of sampled values of the input signal and one or more of the plurality of values of the error signal. The adaptation module adjusts a transfer function of the at least one linear equalizer based on the determined gradient signal.
摘要翻译：所描述的实施例提供了一种在通信系统中调整至少一个线性均衡器的可配置参数的方法。发送装置向接收机施加输入信号。至少一个线性均衡器使输入信号均衡。采样器产生输入信号的一个或多个采样值。数据检测器将输入信号的采样值数字化。至少一个错误检测模块基于输入信号的多个采样值和目标值中的一个或多个产生误差信号。适应模块基于输入信号的多个采样值中的一个或多个与误差信号的多个值中的一个或多个的比较来确定梯度信号。适配模块基于所确定的梯度信号调整至少一个线性均衡器的传递函数。

10. 发明申请

US20070206670A1 Method and apparatus for adaptively establishing a sampling phase for decision-feedback equalization 有权
标题翻译：用于自适应地建立用于判决反馈均衡的采样相位的方法和装置
公开(公告)号：US20070206670A1
公开(公告)日：2007-09-06
申请号：US11356690
申请日：2006-02-17
申请人： Pervez Aziz
发明人： Pervez Aziz
IPC分类号： H03H7/30
CPC分类号： H04L25/03057 , H04L7/0332
摘要： Methods and apparatus are provided for adaptively establishing the optimal sampling phase offset for a DFE operation. According to one aspect of the invention, one or more values in an amplitude domain are converted into a time domain, for example, using a phase detector, based on phase information to provide said sampling phase. The values in the amplitude domain optionally comprise one or more of detected DFE data, ŷ(n) and a sign of an error term for detected DFE data. The sampling phase can establish the phase of an independent clock or an offset to a second clock, such as a clock recovered from a received signal by a clock and data recovery (CDR) circuit.
摘要翻译：提供了用于自适应地建立DFE操作的最佳采样相位偏移的方法和装置。根据本发明的一个方面，幅度域中的一个或多个值被转换成时域，例如，使用相位检测器，基于相位信息来提供所述采样相位。幅度域中的值可选地包括检测到的DFE数据，y（n）中的一个或多个以及用于检测到的DFE数据的误差项的符号。采样相位可以建立独立时钟或偏移到第二时钟的相位，例如通过时钟和数据恢复（CDR）电路从接收信号恢复的时钟。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式