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33 条记录 (耗时 0.026 秒)

    Device and method for precoding data signals for PCM transmission
    1.
    发明授权
    Device and method for precoding data signals for PCM transmission 失效
    用于PCM传输的数据信号预编码的装置和方法

    公开(公告)号：US06173015B2

    公开(公告)日：2001-01-09

    申请号：US09092482

    申请日：1998-06-05

    申请人： M. Vedat Eyuboglu ,  Pierre A. Humblet ,  Dae-young Kim ,  Jian Yang

    发明人： M. Vedat Eyuboglu ,  Pierre A. Humblet ,  Dae-young Kim ,  Jian Yang

    IPC分类号： H04C2549

    CPC分类号： H04L25/03343 ,  H04L25/4927

    摘要： A device and method for precoding a sequence of analog levels transmitted over an analog channel to a quantization device, wherein the analog channel modifies the transmitted analog levels, including: a mapping device for mapping data bits to be transmitted to a sequence of equivalence classes, wherein each equivalence class contains one or more constellation points; a constellation point selector interconnected to the mapping device which selects a constellation point in each equivalence class to represent the data bits to be transmitted and which transmits a level that produces the selected constellation point at an input to the quantization device; and a filter device, operably coupled to the constellation point selector, which receives at its input previously transmitted levels and provides its output to the constellation point selector; wherein the filter device has a filter response which is based on the previously transmitted levels and a target response, and the target response is adapted using an analog channel error signal, the selected constellation point at an input to the quantization device.

    摘要翻译： 一种用于将通过模拟通道传输的模拟电平序列预编码到量化装置的装置和方法，其中所述模拟通道修改所发射的模拟电平，包括：映射装置，用于将要发送的数据位映射到等价类序列， 其中每个等价类包含一个或多个星座点; 互连到映射设备的星座点选择器，其选择每个等价类中的星座点以表示要发送的数据比特，并且在向量化设备的输入处发送产生所选择的星座点的电平; 以及滤波器装置，其可操作地耦合到星座点选择器，其在其输入端接收先前传输的电平并将其输出提供给星座点选择器; 其中所述滤波器装置具有基于先前发送的电平和目标响应的滤波器响应，并且使用模拟信道误差信号来适配所述目标响应，所述选择的星座点在所述量化装置的输入处。

    Device and method for precoding data signals for PCM transmission
    4.
    发明授权
    Device and method for precoding data signals for PCM transmission 失效
    用于PCM传输的数据信号预编码的装置和方法

    公开(公告)号：US06198776B1

    公开(公告)日：2001-03-06

    申请号：US08999249

    申请日：1997-12-29

    申请人： M. Vedat Eyuboglu ,  Pierre A. Humblet ,  Dae-young Kim

    发明人： M. Vedat Eyuboglu ,  Pierre A. Humblet ,  Dae-young Kim

    IPC分类号： H04L2549

    CPC分类号： H04L25/03343 ,  H04L25/4927

    摘要： A device and method for preceding data signals for pulse code modulation (PCM) transmission includes a transmitter for transmitting a sequence of analog levels over an analog channel to a quantization device, wherein the analog channel modifies the transmitted analog levels, the transmitter comprising: a mapping device for mapping data bits to be transmitted to a sequence of equivalence classes, wherein each equivalence class contains one or more constellation points; and a constellation point selector interconnected to the mapping device which selects a constellation point in each equivalence class to represent the data bits to be transmitted and which transmits an analog level that produces the selected constellation point at an input to the quantization device.

    摘要翻译： 用于前面用于脉码调制（PCM）传输的数据信号的装置和方法包括用于通过模拟信道将模拟电平序列发送到量化装置的发射机，其中所述模拟信道修改所发送的模拟电平，所述发射机包括： 用于将要发送的数据比特映射到等价类的序列，其中每个等价类包含一个或多个星座点; 以及与映射设备互连的星座点选择器，其选择每个等价类中的星座点以表示要发送的数据比特，并且在向量化设备的输入处发送产生所选择的星座点的模拟电平。

    System and device for, and method of, detecting, characterizing, and mitigating deterministic distortion in a communications network
    5.
    发明授权
    System and device for, and method of, detecting, characterizing, and mitigating deterministic distortion in a communications network 失效
    用于通信网络中的确定性失真的系统和设备，以及检测，表征和减轻确定性失真的方法

    公开(公告)号：US5875229A

    公开(公告)日：1999-02-23

    申请号：US730433

    申请日：1996-10-15

    申请人： M. Vedat Eyuboglu ,  Arthur J. Barabell ,  Pierre A. Humblet

    发明人： M. Vedat Eyuboglu ,  Arthur J. Barabell ,  Pierre A. Humblet

    IPC分类号： H04M1/24 ,  H04J3/12 ,  H04L25/03 ,  H04L25/49 ,  H04M3/08 ,  H04M3/22

    CPC分类号： H04L25/4902 ,  H04J3/125 ,  H04L25/03828 ,  H04L25/4927

    摘要： A system and device for, and method of, detecting, characterizing, and mitigating deterministic distortion in a communication system. An exemplary communication system includes a digital adaptor for sending octets on to a backbone of a PSTN, which then sends, and potentially distorts the octets, received by a line interface. The line interface converts the octets to baseband signals received by an analog adaptor. Several mechanisms and methods are described in which the analog and digital adaptor cooperate to detect the presence of distortion, in particular, robbed bit signaling, on the communication system. The characterization may then be used to mitigate the effects of the distortion. Several receive constellations are provided, each constructed in view of the transmit constellation and in view of the manner in which the deterministic distortion will distort signals transmitted over the system. The receive constellations differ from the transmit constellation. The analog adaptor uses an appropriate receive constellation based on the type of distortion expected at a given interval. The digital adaptor may similarly include several constellation in view of the same considerations.

    摘要翻译： 用于通信系统中的确定性失真的系统和设备以及检测，表征和减轻确定性失真的方法。 示例性通信系统包括用于将八位字节发送到PSTN的骨干网的数字适配器，然后PSTN发送并可能使由线路接口接收的八位字节发生扭曲。 线路接口将八位字节转换为模拟适配器接收到的基带信号。 描述了几种机构和方法，其中模拟和数字适配器协作以在通信系统上检测失真的存在，特别是抢占位信令。 然后可以使用表征来减轻失真的影响。 提供了几个接收星座，每个接收星座都是根据发射星座构建的，并且鉴于确定性失真会扭曲在系统上传输的信号的方式。 接收星座与发射星座不同。 模拟适配器根据给定间隔期望的失真类型使用适当的接收星座。 考虑到相同的考虑，数字适配器可以类似地包括几个星座。

    Device, system and method for spectrally shaping transmitted data signals
    6.
    发明授权
    Device, system and method for spectrally shaping transmitted data signals 失效
    用于对发射数据信号进行频谱整形的装置，系统和方法

    公开(公告)号：US5818879A

    公开(公告)日：1998-10-06

    申请号：US747840

    申请日：1996-11-13

    申请人： M. Vedat Eyuboglu ,  Pierre A. Humblet

    发明人： M. Vedat Eyuboglu ,  Pierre A. Humblet

    IPC分类号： H04L25/49

    CPC分类号： H04L25/4927

    摘要： A transmitter for transmitting a sequence of octets over a digital network which digital network converts the octets into a sequence of levels for transmission over an analog channel to a receiver, the levels producing an analog signal having a predefined spectral shape, the transmitter including: a mapping device which receives at its input groups of data bits to be transmitted and outputs for each group an equivalence class of one or more levels, wherein at least one equivalence class contains more than one level; a level selector, operably coupled to the mapping device, for selecting the level in the equivalence class to represent the group of data bits to be transmitted; a filter device, operably coupled to the level selector and having a filter response corresponding to the predefined spectral shape, which receives at its input previously selected levels and provides its output to the level selector, wherein the level selector selects the level to be transmitted based on the output of the filter device; and an octet converter, operably coupled to the level selector, which receives the selected level at its input and transmits over the digital network an octet corresponding to the selected level to produce the analog signal having the predefined spectral shape when the transmitted octets are converted to levels in the digital network.

    摘要翻译： 一种用于在数字网络上发送八位字节序列的发射机，该数字网络将八位字节转换成用于通过模拟信道传输到接收机的电平序列，所述电平产生具有预定频谱形状的模拟信号，所述发射机包括： 映射设备，其在其输入的数据位组接收要发送的数据位，并且为每个组输出一个或多个级别的等效类，其中至少一个等价类包含多于一个级; 电平选择器，可操作地耦合到映射设备，用于选择等价类中的电平以表示要发送的数据位组; 滤波器装置，可操作地耦合到电平选择器并且具有对应于预定频谱形状的滤波器响应，其在其输入端接收先前选择的电平并将其输出提供给电平选择器，其中电平选择器选择要发射的电平 在过滤装置的输出上; 以及八位字节转换器，其可操作地耦合到电平选择器，电平选择器在其输入端接收所选择的电平，并在数字网络上传输对应于所选电平的八位字节，以便当发送的八位字节被转换为 数字网络的水平。