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    • 11. 发明授权
    • Digital receiver with noise filter which also serves as a feedback
filter providing intersymbol interference reduction
    • 具有噪声滤波器的数字接收机,也可用作提供符号间干扰减少的反馈滤波器
    • US5761243A
    • 1998-06-02
    • US642803
    • 1996-05-03
    • Mark A. RussellRobert J. SluijterJohannes W. M. Bergmans
    • Mark A. RussellRobert J. SluijterJohannes W. M. Bergmans
    • H04L25/03H04L27/01
    • H04L25/03146
    • A receiver for transmitted signals which represent digital symbol values includes a low-pass filter to minimize transmission noise by reducing the receiver bandwidth. However, this creates pulse distortion which can cause intersymbol interference when the filtered signal is supplied to a symbol detector. Such interference is minimized by the inclusion of a feedback loop between the output of the symbol detector and the input to the filter, in which a detected symbol is multiplied by correction factor and supplied to a subtractor where it is subtracted from the signal to be filtered. The result of the subtraction is supplied to the filter. The noise reduction filter is thus also used for matching the intersymbol distortion characteristic of a filtered detected symbol to the intersymbol distortion characteristic of a filtered received signal pulse.
    • 代表数字符号值的发送信号的接收机包括低通滤波器,以通过减少接收机带宽来最小化传输噪声。 然而,当滤波信号被提供给符号检测器时,这产生脉冲失真,这可能导致符号间干扰。 通过在符号检测器的输出和滤波器的输入之间包括反馈回路来最小化这种干扰,其中检测到的符号乘以校正因子,并将其提供给减法器,在该减法器中将其从要滤波的信号中减去 。 减法的结果被提供给过滤器。 因此,噪声降低滤波器也用于将滤波后的检测符号的符号间失真特性与已滤波的接收信号脉冲的码间失真特性相匹配。
    • 12. 发明授权
    • Pots splitter assembly with improved transhybrid loss for digital
subscriber loop transmission
    • 具有改进的数字用户环路传输的变压器损耗的分支器组件
    • US5757803A
    • 1998-05-26
    • US562981
    • 1995-11-27
    • Mark A. RussellDavid B. Ribner
    • Mark A. RussellDavid B. Ribner
    • H04M11/06
    • H04M11/062H04Q2213/13034H04Q2213/13174H04Q2213/1319H04Q2213/13199H04Q2213/13305H04Q2213/1332
    • A data transmission system including a telephone service subscriber loop utilized for transmission of data including telephone service signals; a splitter operable for splitting the subscriber loop into a first transmission path including a low pass filter which accommodates a continuation of telephone service signal transmissions along the subscriber loop and a second transmission path, said second transmission path including a capacitive element for attenuating the telephone service signals; and a digital subscriber loop transceiver coupled to the second transmission path for implementing high rate digital data transmission over the subscriber loop, the transceiver including a frontend processing circuit having a transmit path and a receive path, at least said receive path comprising a high pass filter for further attenuating said telephone service signals. The capacitive element in the second transmission path and the high pass filter in the receive path of the transceiver frontend operate in conjunction to maintain transhybrid loss.
    • 一种数据传输系统,包括用于传输包括电话业务信号的数据的电话业务用户环路; 分离器,其可操作用于将所述用户环路分解成包括低通滤波器的第一传输路径,所述低通滤波器容纳沿着所述用户环路的电话服务信号传输的继续和第二传输路径,所述第二传输路径包括用于衰减所述电话服务 信号; 耦合到第二传输路径的数字用户环路收发机,用于在用户环路上实现高速率数字数据传输,该收发器包括具有发射路径和接收路径的前端处理电路,至少所述接收路径包括高通滤波器 用于进一步衰减所述电话服务信号。 第二传输路径中的电容元件和收发器前端的接收路径中的高通滤波器一起工作,以保持变压器损耗。
    • 14. 发明授权
    • Method and apparatus for spectral containment over telephone service lines
    • 用于通过电话服务线路进行频谱抑制的方法和装置
    • US06711260B1
    • 2004-03-23
    • US09376485
    • 1999-08-18
    • Mark A. RussellStephen Weinert
    • Mark A. RussellStephen Weinert
    • H04M100
    • H04M11/062H04M3/007
    • A filter passing only desired frequencies is selected according to a desired level of service for copper lines. At a point of access between a loop plant and Central Office, the filter is interposed in series over a telephone service line to provide spectral containment by restricting the frequencies of transmission passing along the line. The filter is preferably mounted within a 6-pin module used in a protector block at the Central Office or remote terminal facility, interfaces with a 5-pin module, or is placed upstream or downstream of a protector block such that it does not interfere with the operation thereof. Service is activated, and the spectral containment apparatus prevents the transmission of unexpected or unintended services over the line.
    • 根据铜线的所需服务水平,选择仅传送所需频率的滤波器。 在环路设备和中心局之间的接入点,滤波器通过电话业务线串联插入,以通过限制沿着线路的传输频率来提供频谱容纳。 过滤器最好安装在中央办公室或远程终端设备的保护块中使用的6针模块中,与5针模块相连,或者放置在保护块的上游或下游,使其不干扰 其操作。 服务被激活,并且频谱抑制装置防止在线上传输意外或非预期的服务。
    • 18. 发明授权
    • Method and apparatus for spectral containment over telephone service lines
    • 用于通过电话服务线路进行频谱抑制的方法和装置
    • US07020275B2
    • 2006-03-28
    • US10732230
    • 2003-12-11
    • Mark A. RussellStephen Weinert
    • Mark A. RussellStephen Weinert
    • H04M1/00H04M9/00
    • H04M11/062H04M3/007
    • A filter passing only desired frequencies is selected according to a desired level of service for copper lines. At a point of access between a loop plant and Central Office, the filter is interposed in series over a telephone service line to provide spectral containment by restricting the frequencies of transmission passing along the line. The filter is preferably mounted within a 5-pin module used in a protector block at the Central Office or remote terminal facility, interfaces with a 5-pin module, or is placed upstream or downstream of a protector block such that it does not interfere with the operation thereof. Service is activated, and the spectral containment apparatus prevents the transmission of unexpected or unintended services over the line.
    • 根据铜线的所需服务水平,选择仅传送所需频率的滤波器。 在环路设备和中心局之间的接入点,滤波器通过电话业务线串联插入,以通过限制沿着线路的传输频率来提供频谱容纳。 过滤器最好安装在中央办公室或远程终端设施的保护块中使用的5针模块中,与5针模块接口,或者放置在保护块的上游或下游,使其不会干扰 其操作。 服务被激活,并且频谱抑制装置防止在线上传输意外或非预期的服务。
    • 19. 发明授权
    • Method for facing a substrate
    • 面对基板的方法
    • US06470558B1
    • 2002-10-29
    • US08722260
    • 1996-12-17
    • Mark A. RussellFrederick B. Russell
    • Mark A. RussellFrederick B. Russell
    • B22D1908
    • E21B17/1085B23K31/025Y10T29/49888
    • A method of facing a substrate comprises the steps of first welding a body of a hard facing material to the substrate and then filling a space around the body with a molten metal. The method can be used in the hard facing of metal components with, for example, hard facing materials such as tungsten carbide. The substrate can comprise a metal surface, which can, for example, be the surface of any suitable component, tool, or implement subject to wear in use. The method is particularly suitable for hard facing the wear surfaces of components for use in drill strings in down-hole drilling technology, for example, drill stabilizers.
    • 面对衬底的方法包括以下步骤:首先将硬质材料的主体焊接到衬底,然后用熔融金属填充身体周围的空间。 该方法可以用于例如硬质材料如碳化钨的金属部件的硬面。 基底可以包括金属表面,其可以例如是在使用中经受磨损的任何合适的部件,工具或工具的表面。 该方法特别适用于在井下钻井技术(例如钻井稳定器)中用于钻柱中的部件的磨损表面。