公开(公告)号：US08514925B2

公开(公告)日：2013-08-20

申请号：US12178301

申请日：2008-07-23

申请人： Xingdong Dai ,  Dwight D. Daugherty ,  Max J. Olsen ,  Geoffrey Zhang

发明人： Xingdong Dai ,  Dwight D. Daugherty ,  Max J. Olsen ,  Geoffrey Zhang

IPC分类号： H03H7/30

CPC分类号： H04L25/03343 ,  H04L25/03057

摘要： Methods and apparatus are provided for joint adaptation of filter values in two communicating devices, such as a link partner and a link device. The disclosed joint adaptation process initially adapts the filter coefficient values in a first of the two communicating devices until a predefined stopping criteria is satisfied. Thereafter, the filter coefficient values in a second of the two communicating devices are adapted once the predefined stopping criteria for the first communicating device is satisfied. The filter coefficient values can comprise coefficient values of a multi-tap filter. The predefined stopping criteria may determine, for example, whether the first of the two communicating devices is overequalized. The filter coefficient values can be determined by including a contribution of only certain cursor tap values of the channel impulse response.

摘要翻译： 提供了用于在诸如链路伙伴和链路设备的两个通信设备中联合适配过滤器值的方法和装置。 所公开的联合适应过程最初适应两个通信设备中的第一个中的滤波器系数值，直到满足预定义的停止标准。 此后，一旦满足了第一通信装置的预定义的停止标准，则适配两个通信装置中的第二个的滤波器系数值。 滤波器系数值可以包括多抽头滤波器的系数值。 预定义的停止标准可以例如确定两个通信设备中的第一个是否被过度预定。 可以通过仅包括信道脉冲响应的某些光标抽头值的贡献来确定滤波器系数值。

公开(公告)号：US20100020860A1

公开(公告)日：2010-01-28

申请号：US12178301

申请日：2008-07-23

申请人： Xingdong Dai ,  Dwight D. Daugherty ,  Max J. Olsen ,  Geoffrey Zhang

发明人： Xingdong Dai ,  Dwight D. Daugherty ,  Max J. Olsen ,  Geoffrey Zhang

IPC分类号： H04L27/01

CPC分类号： H04L25/03343 ,  H04L25/03057

摘要： Methods and apparatus are provided for joint adaptation of filter values in two communicating devices, such as a link partner and a link device. The disclosed joint adaptation process initially adapts the filter coefficient values in a first of the two communicating devices until a predefined stopping criteria is satisfied. Thereafter, the filter coefficient values in a second of the two communicating devices are adapted once the predefined stopping criteria for the first communicating device is satisfied. The filter coefficient values can comprise coefficient values of a multi-tap filter. The predefined stopping criteria may determine, for example, whether the first of the two communicating devices is overequalized. The filter coefficient values can be determined by including a contribution of only certain cursor tap values of the channel impulse response.

摘要翻译： 提供了用于在诸如链路伙伴和链路设备的两个通信设备中联合适配过滤器值的方法和装置。 所公开的联合适应过程最初适应两个通信设备中的第一个中的滤波器系数值，直到满足预定义的停止标准。 此后，一旦满足了第一通信装置的预定义的停止标准，则适配两个通信装置中的第二个的滤波器系数值。 滤波器系数值可以包括多抽头滤波器的系数值。 预定义的停止标准可以例如确定两个通信设备中的第一个是否被过度预定。 可以通过仅包括信道脉冲响应的某些光标抽头值的贡献来确定滤波器系数值。

公开(公告)号：US20100290515A1

公开(公告)日：2010-11-18

申请号：US12467507

申请日：2009-05-18

申请人： Xingdong Dai ,  Wenyi Jin ,  Max J. Olsen ,  Geoffrey Zhang

发明人： Xingdong Dai ,  Wenyi Jin ,  Max J. Olsen ,  Geoffrey Zhang

IPC分类号： H03H7/40

CPC分类号： H04L25/03057

摘要： A receiver comprises equalization circuitry implementing at least first and second gain adaptation loops associated with respective first and second frequency bands. The equalization circuitry in one aspect is operative to identify a pattern in a portion of a received serial data stream, and to perform gain adaptation for the receiver utilizing a particular one of the gain adaptation loops responsive to the identified pattern. For example, the gain adaptation may be performed utilizing a low frequency gain adaptation loop if the detected pattern is of a first type generally associated with a low frequency band, and may be performed utilizing a high frequency gain adaptation loop if the detected pattern is of a second type generally associated with a high frequency band. In other aspects, the first and second gain adaptation loops may be activated in a particular serial order or in parallel.

摘要翻译： 接收机包括实现与相应的第一和第二频带相关联的至少第一和第二增益适配环路的均衡电路。 一个方面中的均衡电路用于识别接收的串行数据流的一部分中的模式，并且响应于所识别的模式，利用增益适配环路中的特定一个对接收机执行增益适配。 例如，如果检测到的模式是通常与低频带相关联的第一类型，则可以利用低频增益适配环来执行增益适配，并且如果检测到的模式是 通常与高频带相关联的第二类型。 在其他方面，可以以特定的串行顺序或并行地激活第一和第二增益适配环。

公开(公告)号：US08559580B2

公开(公告)日：2013-10-15

申请号：US12494771

申请日：2009-06-30

申请人： Xingdong Dai ,  Dwight David Daugherty ,  Max J. Olsen ,  Lane A. Smith ,  Geoffrey Zhang

发明人： Xingdong Dai ,  Dwight David Daugherty ,  Max J. Olsen ,  Lane A. Smith ,  Geoffrey Zhang

IPC分类号： H04L7/00 ,  H04L25/00 ,  H04L25/40

CPC分类号： H04L1/20

摘要： Techniques are disclosed for asynchronous calibration for eye diagram generation. For example, a method for calibrating a process for generating a data eye associated with a received signal comprises the following steps. Samples of the received signal are obtained for a first unit interval using a first data latch and a roaming latch. A delay offset is determined between the first data latch and the roaming latch by comparing at least one sample obtained using the first data latch and at least one sample obtained using the roaming latch, wherein the delay offset determined by the comparison is used to calibrate the process for generating the data eye associated with the received signal. A similar comparison may be done for a second data latch and used to calibrate the process. The method is able to find the accurate position of each data latch with respect to the roaming latch so as to improve the accuracy of data decoding in a digital receiver, i.e., provide receiver optimization.

摘要翻译： 公开了用于眼图生成的异步校准的技术。 例如，用于校准与接收信号相关联的用于生成数据眼的处理的方法包括以下步骤。 使用第一数据锁存器和漫游锁存器，以第一单位间隔获得接收信号的样本。 通过比较使用第一数据锁存器获得的至少一个样本和使用漫游锁存器获得的至少一个样本，在第一数据锁存器和漫游锁存器之间确定延迟偏移，其中由比较确定的延迟偏移用于校准 用于产生与接收信号相关联的数据眼的过程。 可以对第二数据锁存器进行类似的比较，并用于校准该过程。 该方法能够找到每个数据锁存器相对于漫游锁存器的准确位置，以提高数字接收机中数据解码的准确度，即提供接收机优化。

公开(公告)号：US08611406B2

公开(公告)日：2013-12-17

申请号：US12494805

申请日：2009-06-30

申请人： Xingdong Dai ,  Max J. Olsen ,  Scott A. Werner ,  Geoffrey Zhang

发明人： Xingdong Dai ,  Max J. Olsen ,  Scott A. Werner ,  Geoffrey Zhang

IPC分类号： H04B3/46 ,  H04B17/00 ,  H04Q1/20

CPC分类号： G01R31/3171

摘要： Communication system optimization using a soft receiver masking technique is disclosed. For example, a method for testing a communication device comprises obtaining a software representation of a receiver portion of a given communication device. A data signal received from a transmitter through a given link channel is then processed, wherein the processing step is performed using the software representation of the receiver portion of the communication device. An output signal is caused to be generated by the software representation of the receiver portion. An eye mask test is then applied to the output signal. Based on a result of the eye mask test, one or more parameters of the transmitter may be adjusted.

摘要翻译： 公开了使用软接收机屏蔽技术的通信系统优化。 例如，用于测试通信设备的方法包括获得给定通信设备的接收机部分的软件表示。 然后处理从发射机通过给定链路信道接收的数据信号，其中使用通信设备的接收机部分的软件表示来执行处理步骤。 由接收器部分的软件表示产生输出信号。 然后将眼罩测试应用于输出信号。 基于眼罩测试的结果，可以调整发射器的一个或多个参数。

公开(公告)号：US07882404B2

公开(公告)日：2011-02-01

申请号：US11935759

申请日：2007-11-06

申请人： Xingdong Dai ,  Geoffrey Zhang ,  Max J. Olsen

发明人： Xingdong Dai ,  Geoffrey Zhang ,  Max J. Olsen

IPC分类号： G01R31/28

CPC分类号： H04L25/03343 ,  H04L25/0264 ,  H04L25/0286 ,  H04L25/03057 ,  H04L25/4923

摘要： The present invention implements a method and apparatus for using components within a Serializer/DeSerializer (SerDes) to emulate the effects of a backplane in order to facilitate automated test equipment (ATE) testing of the SerDes. The SerDes includes a transmitter pre-emphasis circuit (TPXE) that pre-emphasizes a transmitted signal and a receiver equalization circuit (RXEQ) that equalizes a received signal. The TPXE includes coefficients that are dynamically programmable.

摘要翻译： 本发明实现了使用串行器/解串器（SerDes）内的组件来模拟背板的效果以方便SerDes的自动测试设备（ATE）测试的方法和装置。 SerDes包括预先强调发射信号的发射机预加重电路（TPXE）和均衡接收信号的接收机均衡电路（RXEQ）。 TPXE包括可动态编程的系数。

公开(公告)号：US20090119554A1

公开(公告)日：2009-05-07

申请号：US11935759

申请日：2007-11-06

申请人： Xingdong Dai ,  Geoffrey Zhang ,  Max J. Olsen

发明人： Xingdong Dai ,  Geoffrey Zhang ,  Max J. Olsen

IPC分类号： G01R31/3181 ,  H04L27/01 ,  G06F17/00

CPC分类号： H04L25/03343 ,  H04L25/0264 ,  H04L25/0286 ,  H04L25/03057 ,  H04L25/4923

摘要： The present invention implements a method and apparatus for using components within a Serializer/DeSerializer (SerDes) to emulate the effects of a backplane in order to facilitate automated test equipment (ATE) testing of the SerDes. The SerDes includes a transmitter pre-emphasis circuit (TPXE) that pre-emphasizes a transmitted signal and a receiver equalization circuit (RXEQ) that equalizes a received signal. The TPXE includes coefficients that are dynamically programmable.

摘要翻译： 本发明实现了使用串行器/解串器（SerDes）内的组件来模拟背板的效果以方便SerDes的自动测试设备（ATE）测试的方法和装置。 SerDes包括预先强调发射信号的发射机预加重电路（TPXE）和均衡接收信号的接收机均衡电路（RXEQ）。 TPXE包括可动态编程的系数。

公开(公告)号：US08125259B2

公开(公告)日：2012-02-28

申请号：US11968942

申请日：2008-01-03

申请人： Xingdong Dai ,  Weiwei Mao ,  Max J. Olsen ,  Geoffrey Zhang

发明人： Xingdong Dai ,  Weiwei Mao ,  Max J. Olsen ,  Geoffrey Zhang

IPC分类号： H03K3/017

CPC分类号： H04L1/241 ,  H03M9/00 ,  H04L1/205

摘要： A method and system for modeling and calibrating duty cycle distortion (DCD) of a Serializer and Deserializer (SerDes) device, including first generating a clock DCD signal. Once the clock DCD signal is generated, it is calibrating based upon results obtained from a filtering process of the clock DCD signal. Once the clock DCD signal is calibrated, a data DCD signal is generated and calibrated based upon results obtained from a filtering process of the data DCD signal.

摘要翻译： 一种用于建模和校准串行器和解串器（SerDes）器件的占空比失真（DCD）的方法和系统，包括首先产生时钟DCD信号。 一旦产生时钟DCD信号，它就是根据从时钟DCD信号的滤波处理获得的结果进行校准。 一旦时钟DCD信号被校准，基于从数据DCD信号的滤波处理获得的结果来产生和校准数据DCD信号。

公开(公告)号：US20100329319A1

公开(公告)日：2010-12-30

申请号：US12494805

申请日：2009-06-30

申请人： Xingdong Dai ,  Max J. Olsen ,  Scott A. Werner ,  Geoffrey Zhang

发明人： Xingdong Dai ,  Max J. Olsen ,  Scott A. Werner ,  Geoffrey Zhang

IPC分类号： H04B17/00

CPC分类号： G01R31/3171

摘要： Communication system optimization using a soft receiver masking technique is disclosed. For example, a method for testing a communication device comprises obtaining a software representation of a receiver portion of a given communication device. A data signal received from a transmitter through a given link channel is then processed, wherein the processing step is performed using the software representation of the receiver portion of the communication device. An output signal is caused to be generated by the software representation of the receiver portion. An eye mask test is then applied to the output signal. Based on a result of the eye mask test, one or more parameters of the transmitter may be adjusted.

摘要翻译： 公开了使用软接收机屏蔽技术的通信系统优化。 例如，用于测试通信设备的方法包括获得给定通信设备的接收机部分的软件表示。 然后处理从发射机通过给定链路信道接收的数据信号，其中使用通信设备的接收机部分的软件表示来执行处理步骤。 由接收器部分的软件表示产生输出信号。 然后将眼罩测试应用于输出信号。 基于眼罩测试的结果，可以调整发射器的一个或多个参数。

公开(公告)号：US20100329318A1

公开(公告)日：2010-12-30

申请号：US12494771

申请日：2009-06-30

申请人： Xingdong Dai ,  Dwight David Daugherty ,  Max J. Olsen ,  Lane A. Smith ,  Geoffrey Zhang

发明人： Xingdong Dai ,  Dwight David Daugherty ,  Max J. Olsen ,  Lane A. Smith ,  Geoffrey Zhang

IPC分类号： H04B17/00

CPC分类号： H04L1/20

摘要： Techniques are disclosed for asynchronous calibration for eye diagram generation. For example, a method for calibrating a process for generating a data eye associated with a received signal comprises the following steps. Samples of the received signal are obtained for a first unit interval using a first data latch and a roaming latch. A delay offset is determined between the first data latch and the roaming latch by comparing at least one sample obtained using the first data latch and at least one sample obtained using the roaming latch, wherein the delay offset determined by the comparison is used to calibrate the process for generating the data eye associated with the received signal. A similar comparison may be done for a second data latch and used to calibrate the process. The method is able to find the accurate position of each data latch with respect to the roaming latch so as to improve the accuracy of data decoding in a digital receiver, i.e., provide receiver optimization.

摘要翻译： 公开了用于眼图生成的异步校准的技术。 例如，用于校准与接收信号相关联的用于生成数据眼的处理的方法包括以下步骤。 使用第一数据锁存器和漫游锁存器，以第一单位间隔获得接收信号的样本。 通过比较使用第一数据锁存器获得的至少一个样本和使用漫游锁存器获得的至少一个样本，在第一数据锁存器和漫游锁存器之间确定延迟偏移，其中由比较确定的延迟偏移用于校准 用于产生与接收信号相关联的数据眼的过程。 可以对第二数据锁存器进行类似的比较，并用于校准该过程。 该方法能够找到每个数据锁存器相对于漫游锁存器的准确位置，以提高数字接收机中数据解码的准确度，即提供接收机优化。