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    • 3. 发明授权
    • Adaptive method and apparatus for transmission line analysis
    • 用于传输线分析的自适应方法和装置
    • US06697768B2
    • 2004-02-24
    • US10095847
    • 2002-03-11
    • Keith R. JonesGilberto Isaac Sada TreviñoWilliam W. JonesRagnar H. Jonsson
    • Keith R. JonesGilberto Isaac Sada TreviñoWilliam W. JonesRagnar H. Jonsson
    • G06F1500
    • H04L43/50G01R31/021G01R31/11H04B3/493Y04S40/168
    • A method and system for performing sequence time domain reflectometry to determine the location of line anomalies in a communication channel is disclosed. In one embodiment, the system generates a sequence signal and transmits the sequence signal over a channel. The system receives one or more reflection signals, and performs reflection signal processing on the reflection. In one embodiment, the reflection signal is correlated with the original sequence signal to generate a correlated signal. The system determines a time value between the start of the reflection signal and the subsequent points of correlation to determine a location of a line anomaly. In one embodiment preprocessing and post-processing occurs to counter the effects of a communication device, such as a DMT modulator/demodulator. In one embodiment sampling of the sequence and reflection signal may occur at different times or at a different phase to provide greater resolution of the line anomaly location.
    • 公开了一种用于执行序列时域反射测量以确定通信信道中线路异常的位置的方法和系统。 在一个实施例中,系统生成序列信号并通过信道发送序列信号。 系统接收一个或多个反射信号,并对反射进行反射信号处理。 在一个实施例中,反射信号与原始序列信号相关以产生相关信号。 该系统确定反射信号的起始点和随后的相关点之间的时间值,以确定线路异常的位置。 在一个实施例中,发生预处理和后处理以对抗诸如DMT调制器/解调器之类的通信设备的影响。 在一个实施例中,序列和反射信号的采样可以在不同时间或不同阶段发生,以提供线异常位置的更高分辨率。
    • 4. 发明授权
    • Adaptive decision slicer
    • 自适应决策分片器
    • US06873279B2
    • 2005-03-29
    • US10464963
    • 2003-06-18
    • Keith R. JonesGilberto Isaac Sada TreviñoWilliam W. Jones
    • Keith R. JonesGilberto Isaac Sada TreviñoWilliam W. Jones
    • G11B20/10H04L25/03H04L25/06H03M1/12
    • G11B20/10203H04L25/03019H04L25/062
    • A method and apparatus is disclosed for adaptively determining threshold values in a decision device, such as a decision slicer. In one embodiment, a slicer receives one or more updated threshold values during operation to adaptively accommodate changes in the received signal or the channel that may occur over time. The updated threshold value is based on a MIN value and a MAX value. The MIN values represent a value related to a recently received input that was determined to qualify for a particular slicer output and was less than the particular slicer output value. The MAX values represent a value related to a recently received input that was determined to qualify for a particular slicer output and was greater than the particular slicer output value. In one embodiment, the MAX and MIN value computation is based on scaling factors that dampen the rate of change of the threshold value.
    • 公开了用于在决策设备(例如决策限制器)中自适应地确定阈值的方法和装置。 在一个实施例中,限幅器在操作期间接收一个或多个更新的阈值,以自适应地适应随时间发生的接收信号或信道的改变。 更新的阈值基于MIN值和MAX值。 MIN值表示与最近接收到的输入相关的值,该值被确定为符合特定限幅器输出并且小于特定限幅器输出值。 MAX值表示与最近接收到的输入相关的值,该值被确定为限定特定限幅器输出并且大于特定限幅器输出值。 在一个实施例中,MAX和MIN值计算基于削弱阈值变化率的缩放因子。
    • 5. 发明授权
    • Method and apparatus for transmission line analysis
    • 传输线分析方法和装置
    • US06934655B2
    • 2005-08-23
    • US09810932
    • 2001-03-16
    • Keith R. JonesWilliam W. JonesRagnar H. Jonsson
    • Keith R. JonesWilliam W. JonesRagnar H. Jonsson
    • G01R31/02G01R31/11H04B3/46H04L12/26
    • H04L43/50G01R31/021G01R31/11H04B3/493Y04S40/168
    • A method and system for performing sequence time domain reflectometry to determine the location of line anomalies in a communication channel is disclosed. In one embodiment, the system generates a sequence signal and transmits the sequence signal over a channel that is the subject of the sequence time domain reflectometry analysis. The system monitors for and receives one or more reflections, collectively a reflection signal, and presents the reflection signal to a reflection processing module. In one embodiment, the reflection signal is correlated with the original sequence signal to generate a correlated signal. The system may perform signal analysis on the correlated signal to determine a time value between the start of the reflection signal and the subsequent points of correlation. Based on the time value and the rate of propagation of the signals through the channel, the reflection processing module determines a distance to a line anomaly.
    • 公开了一种用于执行序列时域反射测量以确定通信信道中线路异常的位置的方法和系统。 在一个实施例中,系统生成序列信号并通过作为序列时域反射分析的主题的信道来发送序列信号。 系统监视和接收一个或多个反射,统称为反射信号,并将反射信号呈现给反射处理模块。 在一个实施例中,反射信号与原始序列信号相关以产生相关信号。 系统可以对相关信号执行信号分析,以确定反射信号的起始点和随后的相关点之间的时间值。 基于通过通道的信号的时间值和传播速率,反射处理模块确定到线路异常的距离。
    • 8. 发明授权
    • Communication system activation
    • 通讯系统激活
    • US07698577B2
    • 2010-04-13
    • US11415651
    • 2006-05-02
    • William W. JonesRagnar H. Jonsson
    • William W. JonesRagnar H. Jonsson
    • G06F1/32
    • H04L12/12H04M11/06Y02D50/40Y02D50/44
    • In one embodiment a communication device activation system is provided to restore activation of one or more communication devices that are in a powered-down mode to conserve power usage during a period of inactivity. The activation signal, also referred to as a warm start signal, comprises a sequence signal. A sequence generator generates a desired sequence signal. It is contemplated that one or more sequence signals may be selected for use by the activation system. The sequence signal may be generated or stored and retrieved. To resume communication, a wake-up sequence signal is generated and transmitted to a remote communication device. Upon receipt the received signal is filtered, correlated and analyzed. Analysis may compare one or more aspects of the signal to a threshold signal. If the signal is determined to comprise a wake-up signal, i.e. a request for communication, then a warm-start operation may occur. An acknowledgement signal may optionally be generated to acknowledge receipt of the signal. In one embodiment one or more sequence signals are utilized to monitor channel characteristics and adjust communication device settings accordingly. This may occur as part of the wake-up process.
    • 在一个实施例中,提供通信设备激活系统以恢复处于掉电模式的一个或多个通信设备的激活,以节省在不活动期间的功率使用。 激活信号(也称为暖启动信号)包括序列信号。 序列发生器产生期望的序列信号。 预期可以选择一个或多个序列信号供激活系统使用。 可以生成或存储和检索序列信号。 为了恢复通信,生成唤醒序列信号并发送到远程通信设备。 收到后,接收到的信号进行过滤,相关和分析。 分析可以将信号的一个或多个方面与阈值信号进行比较。 如果信号被确定为包括唤醒信号,即通信请求,则可能发生热启动操作。 可以可选地产生确认信号以确认信号的接收。 在一个实施例中,使用一个或多个序列信号来监视信道特性并相应地调整通信设备设置。 这可能是唤醒过程的一部分。
    • 10. 发明授权
    • Frequency domain echo and next cancellation
    • 频域回波和下一次取消
    • US08363535B2
    • 2013-01-29
    • US12074256
    • 2008-02-29
    • Gavin D. ParnabyGeorge A. ZimmermanChris PagnanelliWilliam W. Jones
    • Gavin D. ParnabyGeorge A. ZimmermanChris PagnanelliWilliam W. Jones
    • H04J1/12H04J3/10
    • H04J1/12H04B3/23H04B3/32
    • A cancellation system is disclosed for processing incoming and outgoing signals in a transform domain to create a cancellation signal for reducing or removing unwanted interference. Data is ordered based on Good-Thomas indexing into a two dimensional array in a buffer. The two dimensional array may have lr rows and lw columns. From the buffer, the columns of data undergo a Winograd small transform. The rows of data undergo a Cooley-Tukey operation to complete the transform operation into the frequency domain. Multipliers scale the transformed data to generate a cancellation signal in the frequency domain. Inverse (Cooley-Tukey) and Winograd transforms perform inverse processing on the cancellation signal to return the cancellation signal or data to the time domain. Re-ordering the data and combination of the cancellation signal or data with incoming or outgoing signals achieve interference cancellation.
    • 公开了一种用于在变换域中处理输入和输出信号以产生用于减少或去除不期望的干扰的消除信号的消除系统。 数据是基于Good-Thomas索引到缓冲区中的二维数组中排序的。 二维阵列可以具有lr行和lw列。 从缓冲区,数据列经历了Winograd小变换。 数据行经过Cooley-Tukey操作以完成到频域的变换操作。 乘法器对经变换的数据进行缩放以在频域中产生消除信号。 反向(Cooley-Tukey)和Winograd变换对消除信号执行反向处理,以将消除信号或数据返回到时域。 重新排序数据,取消信号或数据与输入或输出信号的组合可实现干扰消除。