公开(公告)号：US09025655B1

公开(公告)日：2015-05-05

申请号：US14072895

申请日：2013-11-06

Applicant: LSI Corporation

Inventor： Rajesh Ramadoss ,  Mohammad S. Mobin ,  Thomas F. Gibbons, Jr.

IPC: H03H7/30 ,  H04L25/03

CPC classification number: H04L25/03885 ,  H04L25/03057 ,  H04L25/03343

Abstract: A method of adjusting a post-cursor tap weight in a transmitter FIR filter in a high-speed digital data transmission system. A receiver, over a forward channel, receives a signal from the transmitter and equalizes the received signal using an adaptive analog equalizer coupled to the forward channel and a decision feedback equalizer (DFE) coupled to the analog equalizer. A gain coefficient used to adjust the peaking by the analog equalizer is adapted using an error signal generated by the DFE. The post-cursor tap weight of the transmitter filter is adjusted up or down based on a comparison of the gain coefficient to a set. of limits. The post-cursor tap weight is transmitted to the transmitter over a reverse channel and then equalizers in the receiver readapt. Alternatively, eye opening data and a DFE tap coefficient are used to determine whether the post-cursor tap weight is adjusted up or down.

Abstract translation: 一种在高速数字数据传输系统中调整发射机FIR滤波器中的后光标抽头权重的方法。 接收机通过前向信道接收来自发射机的信号，并使用耦合到前向信道的自适应模拟均衡器和耦合到模拟均衡器的判决反馈均衡器（DFE）来均衡接收信号。 用于通过模拟均衡器调节峰值的增益系数使用DFE产生的误差信号进行调整。 基于增益系数与一组的比较，发送器滤波器的后置光标重量被上下调整。 的限制。 后置光标抽头权重通过反向通道发送到发送器，然后在接收器中对其进行均衡。 或者，使用眼睛打开数据和DFE抽头系数来确定是否向上或向下调整后光标抽头重量。

公开(公告)号：US20150110165A1

公开(公告)日：2015-04-23

申请号：US14072895

申请日：2013-11-06

Applicant: LSI Corporation

Inventor： Rajesh Ramadoss ,  Mohammad S. Mobin ,  Thomas F. Gibbons

IPC: H04L25/03

CPC classification number: H04L25/03885 ,  H04L25/03057 ,  H04L25/03343

Abstract: A method of adjusting a post-cursor tap weight in a transmitter FIR filter in a high-speed digital data transmission system. A receiver, over a forward channel, receives a signal from the transmitter and equalizes the received signal using an adaptive analog equalizer coupled to the forward channel and a decision feedback equalizer (DFE) coupled to the analog equalizer. A gain coefficient used to adjust the peaking by the analog equalizer is adapted using an error signal generated by the DFE. The post-cursor tap weight of the transmitter filter is adjusted up or down based on a comparison of the gain coefficient to a set. of limits. The post-cursor tap weight is transmitted to the transmitter over a reverse channel and then equalizers in the receiver readapt. Alternatively, eye opening data and a DFE tap coefficient are used to determine whether the post-cursor tap weight is adjusted up or down.

Abstract translation: 一种在高速数字数据传输系统中调整发射机FIR滤波器中的后光标抽头权重的方法。 接收机通过前向信道接收来自发射机的信号，并使用耦合到前向信道的自适应模拟均衡器和耦合到模拟均衡器的判决反馈均衡器（DFE）来均衡接收信号。 用于通过模拟均衡器调节峰值的增益系数使用DFE产生的误差信号进行调整。 基于增益系数与一组的比较，发送器滤波器的后置光标重量被上下调整。 的限制。 后置光标抽头权重通过反向通道发送到发送器，然后在接收器中对其进行均衡。 或者，使用眼睛打开数据和DFE抽头系数来确定是否向上或向下调整后光标抽头重量。