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1. 发明授权

US08649476B2 Adjusting sampling phase in a baud-rate CDR using timing skew 有权
标题翻译：使用定时偏移调整波特率CDR中的采样相位
公开(公告)号：US08649476B2
公开(公告)日：2014-02-11
申请号：US13081651
申请日：2011-04-07
申请人： Amaresh Malipatil , Wingfaat Liu , Ye Liu , Freeman Y. Zhong , Chintan Desai
发明人： Amaresh Malipatil , Wingfaat Liu , Ye Liu , Freeman Y. Zhong , Chintan Desai
IPC分类号： H04B1/38
CPC分类号： H04L7/0062 , H04L25/03057 , H04L25/03343
摘要： In described embodiments, a transceiver includes a baud-rate clock and data recovery (CDR) module with an eye sampler, and an adaptation module for adaptively setting parameters of various circuit elements, such as timing, equalizer and gain elements. Data sampling clock phase of the CDR module is set for sampling at, for example, near the center of a data eye detected by the eye sampler, and the phase of data error sampling latch(es) is skewed by the CDR module with respect to the phase of the data sampling latch. Since the error signal driving the timing adaptation contains the information of the pulse response that the CDR module encounters, the phase of timing error sampling latch(es) of the CDR module is skewed based on maintaining a relative equivalence of input pulse response residual pre-cursor and residual post-cursor with respect to the timing error sampling clock phase.
摘要翻译：在所描述的实施例中，收发器包括具有眼睛取样器的波特率时钟和数据恢复（CDR）模块，以及用于自适应地设置诸如定时，均衡器和增益元件的各种电路元件的参数的适配模块。 CDR模块的数据采样时钟相位被设置为在例如由眼睛采样器检测到的数据眼睛的中心附近进行采样，并且数据错误采样锁存器的相位相对于CDR模块偏移数据采样锁存器的相位。由于驱动定时自适应的误差信号包含CDR模块所遇到的脉冲响应的信息，所以基于维持输入脉冲响应残差预测的相对等价，CDR模块的定时误差采样锁存器的相位是偏斜的，光标和剩余后光标相对于定时误差采样时钟相位。

2. 发明申请

US20120257652A1 ADJUSTING SAMPLING PHASE IN A BAUD-RATE CDR USING TIMING SKEW 有权
标题翻译：使用时间轴调整在波特率CDR中的采样相位
公开(公告)号：US20120257652A1
公开(公告)日：2012-10-11
申请号：US13081651
申请日：2011-04-07
申请人： Amaresh Malipatil , Wingfaat Liu , Ye Liu , Freeman Y. Zhong , Chintan Desai
发明人： Amaresh Malipatil , Wingfaat Liu , Ye Liu , Freeman Y. Zhong , Chintan Desai
IPC分类号： H04L7/08 , H04B1/38 , H03H7/30
CPC分类号： H04L7/0062 , H04L25/03057 , H04L25/03343
摘要： In described embodiments, a transceiver includes a baud-rate clock and data recovery (CDR) module with an eye sampler, and an adaptation module for adaptively setting parameters of various circuit elements, such as timing, equalizer and gain elements. Data sampling clock phase of the CDR module is set for sampling at, for example, near the center of a data eye detected by the eye sampler, and the phase of data error sampling latch(es) is skewed by the CDR module with respect to the phase of the data sampling latch. Since the error signal driving the timing adaptation contains the information of the pulse response that the CDR module encounters, the phase of timing error sampling latch(es) of the CDR module is skewed based on maintaining a relative equivalence of input pulse response residual pre-cursor and residual post-cursor with respect to the timing error sampling clock phase.
摘要翻译：在所描述的实施例中，收发器包括具有眼睛采样器的波特率时钟和数据恢复（CDR）模块，以及用于自适应地设置诸如定时，均衡器和增益元件的各种电路元件的参数的适配模块。 CDR模块的数据采样时钟相位被设置为在例如由眼睛采样器检测到的数据眼睛的中心附近进行采样，并且数据错误采样锁存器的相位相对于CDR模块偏移数据采样锁存器的相位。由于驱动定时自适应的误差信号包含CDR模块所遇到的脉冲响应的信息，所以基于维持输入脉冲响应残差预测的相对等价，CDR模块的定时误差采样锁存器的相位是偏斜的，光标和剩余后光标相对于定时误差采样时钟相位。

3. 发明申请

US20130195154A1 Transmitter Adaptation Loop Using Adjustable Gain and Convergence Detection 有权
标题翻译：使用可调节增益和收敛检测的发射机适配环路
公开(公告)号：US20130195154A1
公开(公告)日：2013-08-01
申请号：US13360978
申请日：2012-01-30
申请人： Mohammad Mobin , Amaresh Malipatil , Adam Healey , Ye Liu
发明人： Mohammad Mobin , Amaresh Malipatil , Adam Healey , Ye Liu
IPC分类号： H04B1/38
CPC分类号： H04L12/6418
摘要： A communication port and method of adapting a transmit filter in the port to reduce receive errors by a receiver coupled to the transmit filter via a communication channel. The filter has coefficients that are adjusted in response to a first adaptation gain value, decision bits, and receiver error values. During a first time period, the coefficients are adjusted until changes in the coefficients are less than a first threshold amount. Then during a second time period, the coefficients are adjusted using a second adaptation gain value until changes in the coefficients are less than a second threshold amount. The second adaptation gain value is less than the first adaptation gain value and the second threshold amount being less than the first threshold amount. By using two or more adjustment periods with different gain values, the filter is adapted faster than using a single adjustment period with fixed adaptation gain.
摘要翻译：一种在端口中适配发射滤波器的通信端口和方法，用于通过通信信道减少接收器与发射滤波器的接收误差。滤波器具有响应于第一自适应增益值，判定位和接收器误差值而被调整的系数。在第一时间段期间，系数被调整直到系数的变化小于第一阈值量。然后在第二时间段期间，使用第二自适应增益值来调整系数，直到系数的变化小于第二阈值量。第二自适应增益值小于第一适应增益值，第二阈值量小于第一阈值量。通过使用具有不同增益值的两个或更多个调整周期，滤波器比使用具有固定自适应增益的单个调整周期更适合。

4. 发明授权

US08711906B2 Tracking data eye operating margin for steady state adaptation 有权
标题翻译：跟踪数据眼动操作裕度进行稳态调整
公开(公告)号：US08711906B2
公开(公告)日：2014-04-29
申请号：US12941217
申请日：2010-11-08
申请人： Mohammad Mobin , Ye Liu , Amaresh Malipatil
发明人： Mohammad Mobin , Ye Liu , Amaresh Malipatil
IPC分类号： H04B1/38 , H04L5/16
CPC分类号： H04L25/03012 , H04L2025/03439
摘要： In described embodiments, a transceiver includes an eye monitor and margin detector having one or more samplers with corresponding logic. One or more programmable provisioning parameters are defined based on a pre-defined minimum target operating margin for acceptable noise and jitter margins. For example, two programmable provisioning parameters, phase and voltage, correspond with thresholds for margin samplers placed within the eye. Initially, the transceiver applies equalization, after which an inner eye of the transceiver, as detected by the eye monitor, is relatively open with some margin for supporting channels. If the receiver margin goes below this target margin, the eye closes, which is registered by the samplers. In the presence of spectrally rich input data, if the receiver margin goes below this target margin, an updated adaptation of equalizer or other circuit parameters might be initiated; else, adaptation is not generally required.
摘要翻译：在所描述的实施例中，收发器包括具有具有相应逻辑的一个或多个采样器的眼睛监视器和边缘检测器。基于用于可接受的噪声和抖动余量的预定义的最小目标操作裕度来定义一个或多个可编程供应参数。例如，两个可编程供应参数（相位和电压）对应于放置在眼睛内的余量采样器的阈值。最初，收发机应用均衡，之后由眼睛监视器检测到的收发器的内眼相对开放，具有用于支持信道的一些余量。如果接收机边缘低于该目标边距，则眼睛关闭，由采样器注册。在存在频谱丰富的输入数据的情况下，如果接收器余量低于该目标余量，则可以启动更新的均衡器或其他电路参数的适配; 否则，通常不需要适应。

5. 发明授权

US08837626B2 Conditional adaptation of linear filters in a system having nonlinearity 有权
标题翻译：线性滤波器在具有非线性的系统中的条件适应
公开(公告)号：US08837626B2
公开(公告)日：2014-09-16
申请号：US13315831
申请日：2011-12-09
申请人： Amaresh Malipatil , Pervez M. Aziz , Mohammad S. Mobin , Ye Liu
发明人： Amaresh Malipatil , Pervez M. Aziz , Mohammad S. Mobin , Ye Liu
IPC分类号： H04L27/01
CPC分类号： H04L25/03057 , H04L7/033 , H04L7/0331 , H04L25/0292 , H04L25/0307 , H04L25/03159 , H04L25/03885 , H04L2025/03636 , H04L2025/037
摘要： Described embodiments adjust configurable parameters of at least one filter of a communication system. The method includes conditioning, by an analog front end (AFE) of a receiver in the communication system, an input signal applied to the receiver. Sampled values of the conditioned input signal are generated and digitized. An error detection module generates an error signal based on digitized values of the input signal and a target value. A decision feedback equalizer generates an adjustment signal based on the digitized values of the input signal and values of the error signal. A summer subtracts the adjustment signal from the conditioned input signal, generating an adjusted input signal. An adaptation module determines a conditional adaptation signal based on a comparison of sampled values of the adjusted input signal and values of the error signal. The adaptation module adjusts a transfer function of at least one filter based on the conditional adaptation signal.
摘要翻译：描述的实施例调整通信系统的至少一个滤波器的可配置参数。该方法包括通过通信系统中的接收机的模拟前端（AFE）调整施加到接收机的输入信号。生成调节输入信号的采样值并进行数字化。误差检测模块基于输入信号的数字化值和目标值产生误差信号。判决反馈均衡器基于输入信号的数字化值和误差信号的值生成调整信号。夏季从调节的输入信号中减去调整信号，产生经调整的输入信号。适应模块基于经调整的输入信号的采样值和误差信号的值的比较来确定条件适配信号。适应模块基于条件适应信号来调整至少一个滤波器的传递函数。

6. 发明授权

US08687682B2 Transmitter adaptation loop using adjustable gain and convergence detection 有权
标题翻译：使用可调增益和收敛检测的发射机适配环路
公开(公告)号：US08687682B2
公开(公告)日：2014-04-01
申请号：US13360978
申请日：2012-01-30
申请人： Mohammad Mobin , Amaresh Malipatil , Adam Healey , Ye Liu
发明人： Mohammad Mobin , Amaresh Malipatil , Adam Healey , Ye Liu
IPC分类号： H03K5/159 , H04B1/10
CPC分类号： H04L12/6418
摘要： A communication port and method of adapting a transmit filter in the port to reduce receive errors by a receiver coupled to the transmit filter via a communication channel. The filter has coefficients that are adjusted in response to a first adaptation gain value, decision bits, and receiver error values. During a first time period, the coefficients are adjusted until changes in the coefficients are less than a first threshold amount. Then during a second time period, the coefficients are adjusted using a second adaptation gain value until changes in the coefficients are less than a second threshold amount. The second adaptation gain value is less than the first adaptation gain value and the second threshold amount being less than the first threshold amount. By using two or more adjustment periods with different gain values, the filter is adapted faster than using a single adjustment period with fixed adaptation gain.
摘要翻译：一种在端口中适配发射滤波器的通信端口和方法，用于通过通信信道减少接收器与发射滤波器的接收误差。滤波器具有响应于第一自适应增益值，判定位和接收器误差值而被调整的系数。在第一时间段期间，系数被调整直到系数的变化小于第一阈值量。然后在第二时间段期间，使用第二自适应增益值来调整系数，直到系数的变化小于第二阈值量。第二自适应增益值小于第一适应增益值，第二阈值量小于第一阈值量。通过使用具有不同增益值的两个或更多个调整周期，滤波器比使用具有固定自适应增益的单个调整周期更适合。

7. 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。

8. 发明申请

US20120230454A1 RECEIVER TRAINING WITH CYCLE SLIP DETECTION AND CORRECTION 有权
标题翻译：接收器训练与循环滑动检测和校正
公开(公告)号：US20120230454A1
公开(公告)日：2012-09-13
申请号：US13043908
申请日：2011-03-09
申请人： Mohammad Mobin , Mark Trafford , Ye Liu , Vladimir Sindalovsky , Amaresh Malipatil
发明人： Mohammad Mobin , Mark Trafford , Ye Liu , Vladimir Sindalovsky , Amaresh Malipatil
IPC分类号： H04L7/00
CPC分类号： H04L7/033 , H04L7/0083 , H04L2025/037
摘要： In described embodiments, a transceiver includes a clock and data recovery module (CDR) with an eye monitor and a cycle slip monitor. The cycle slip detector monitors a CDR lock condition, which might be through detection of slips in sampling and/or transition timing detection. The cycle slip detector provides a check point to sense system divergence, allowing for a mechanism to recover CDR lock. In addition, when the CDR is out-of-lock, the various parameters that are adaptively set (e.g., equalizer parameters) might be invalid during system divergence. Consequently, these parameters might be declared invalid by the system and not used.
摘要翻译：在所描述的实施例中，收发器包括具有眼睛监视器和周期滑移监视器的时钟和数据恢复模块（CDR）。循环滑移检测器监测CDR锁定状态，其可以通过在采样和/或转换定时检测中检测到滑移。循环滑移检测器提供检查点以感测系统发散，允许恢复CDR锁的机制。另外，当CDR超出锁定时，自适应设置的各种参数（例如，均衡器参数）在系统发散期间可能是无效的。因此，这些参数可能被系统声明为无效，未被使用。

9. 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。

10. 发明授权

US08605847B2 Receiver training with cycle slip detection and correction 有权
标题翻译：接收机训练与周期滑移检测和校正
公开(公告)号：US08605847B2
公开(公告)日：2013-12-10
申请号：US13043908
申请日：2011-03-09
申请人： Mohammad Mobin , Mark Trafford , Ye Liu , Vladimir Sindalovsky , Amaresh Malipatil
发明人： Mohammad Mobin , Mark Trafford , Ye Liu , Vladimir Sindalovsky , Amaresh Malipatil
IPC分类号： H04L7/00
CPC分类号： H04L7/033 , H04L7/0083 , H04L2025/037
摘要： In described embodiments, a transceiver includes a clock and data recovery module (CDR) with an eye monitor and a cycle slip monitor. The cycle slip detector monitors a CDR lock condition, which might be through detection of slips in sampling and/or transition timing detection. The cycle slip detector provides a check point to sense system divergence, allowing for a mechanism to recover CDR lock. In addition, when the CDR is out-of-lock, the various parameters that are adaptively set (e.g., equalizer parameters) might be invalid during system divergence. Consequently, these parameters might be declared invalid by the system and not used.
摘要翻译：在所描述的实施例中，收发器包括具有眼睛监视器和周期滑移监视器的时钟和数据恢复模块（CDR）。循环滑移检测器监测CDR锁定状态，其可以通过在采样和/或转换定时检测中检测到滑移。循环滑移检测器提供检查点以感测系统发散，允许恢复CDR锁的机制。另外，当CDR超出锁定时，自适应设置的各种参数（例如，均衡器参数）在系统发散期间可能是无效的。因此，这些参数可能被系统声明为无效，未被使用。

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