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    Method for transmitting a digital signal, method for receiving a digital signal, transmitter and receiver
    41.
    发明授权
    Method for transmitting a digital signal, method for receiving a digital signal, transmitter and receiver 有权
    用于发送数字信号的方法，用于接收数字信号的方法，发射机和接收机

    公开(公告)号：US08218694B2

    公开(公告)日：2012-07-10

    申请号：US11573126

    申请日：2005-08-03

    申请人： Chin Keong Ho ,  Yan Wu ,  Sumei Sun ,  Zhongding Lei

    发明人： Chin Keong Ho ,  Yan Wu ,  Sumei Sun ,  Zhongding Lei

    IPC分类号： H04B1/10

    CPC分类号： H04L27/2602 ,  H04L27/2634 ,  H04L27/2649

    摘要： A transmitter (106) for transmitting a signal, the signal comprising a plurality of signal values, the signal values being grouped to at least one signal value block. The transmitter comprises a pre-transformation unit (101) adapted to process each signal value block by a pre-transformation to produce a block of modulation symbols, wherein the pre-transformation comprises a phase rotation of the signal block values, which corresponds to the multiplication of the signal value block with a phase rotation matrix. The transmitter also comprises a modulation unit (102) adapted to modulate at least one carrier signal based on the modulation symbols and a sending unit (104) adapted to send the modulated carrier signal.

    摘要翻译： 一种用于发送信号的发射机（106），所述信号包括多个信号值，所述信号值被分组为至少一个信号值块。 发射机包括预变换单元（101），其适于通过预变换来处理每个信号值块以产生调制符号块，其中预变换包括信号块值的相位旋转，其对应于 信号值块与相位旋转矩阵相乘。 发射机还包括适于基于调制符号调制至少一个载波信号的调制单元（102）和适于发送调制载波信号的发送单元（104）。

    Back Channel Communication
    46.
    发明申请
    Back Channel Communication 有权
    后通道通讯

    公开(公告)号：US20110167325A1

    公开(公告)日：2011-07-07

    申请号：US13046991

    申请日：2011-03-14

    申请人： Massimo Sorbara ,  Patrick Duvaut ,  Yan Wu

    发明人： Massimo Sorbara ,  Patrick Duvaut ,  Yan Wu

    IPC分类号： G06F11/07

    CPC分类号： H04L12/66 ,  H04B3/32

    摘要： Various embodiments are described for back channel communication. One embodiment is a method that comprises receiving data at customer premises equipment (CPE), determining at least one error in the received data, formatting the determined error for communication to a central office (CO), and sending the formatted error to the CO via a back channel, wherein the formatted error is sent between sync frames of a discrete multitone (DMT) superframe.

    摘要翻译： 对于后向信道通信描述了各种实施例。 一个实施例是一种方法，其包括在客户驻地设备（CPE）处接收数据，确定接收到的数据中的至少一个错误，将确定的错误格式化为中心局（CO），并将格式化的错误发送到CO经由 背信道，其中格式化的错误在离散多音（DMT）超帧的同步帧之间发送。

    ATM header compression using hash tables
    50.
    发明授权
    ATM header compression using hash tables 有权
    使用哈希表的ATM头压缩

    公开(公告)号：US07720071B2

    公开(公告)日：2010-05-18

    申请号：US12042930

    申请日：2008-03-05

    申请人： Yan Wu ,  Song Bi ,  Timothy Bornemisza

    发明人： Yan Wu ,  Song Bi ,  Timothy Bornemisza

    IPC分类号： H04L12/28 ,  H04J3/24

    CPC分类号： H04L12/5601 ,  H04L2012/5652

    摘要： Disclosed are exemplary techniques for compressing ATM cells by substituting reduced headers for the original headers. A header table may be maintained at the transmitting end whereby headers are stored in table entries based on a table index generated from a hash function applied to the headers. A copy of the header table may be maintained at the receiving end and may be updated by populating idle cells with header table contents. Upon receipt of a reduced ATM cell at the receiving end, the reduced header may be replaced with a full header obtained from the copy of the header table maintained at the receiving end. The present invention further provides techniques for registration and management of hash collisions.

    摘要翻译： 公开了用于通过用缩小的报头代替原始报头来压缩ATM信元的示例性技术。 可以在发送端维护头表，由此基于从应用于报头的散列函数生成的表索引，将报头存储在表条目中。 标题表的副本可以在接收端保持，并且可以通过用标题表内容填充空闲小区来更新。 在接收端接收到减少的ATM信元时，可以用从保持在接收端的报头表的副本获得的全标头替换减少的报头。 本发明还提供了用于哈希冲突的注册和管理的技术。