Method and apparatus for crosstalk estimation
    1.
    发明申请
    Method and apparatus for crosstalk estimation 审中-公开
    用于串扰估计的方法和装置

    公开(公告)号:US20080285740A1

    公开(公告)日:2008-11-20

    申请号:US12082541

    申请日:2008-04-10

    IPC分类号: H04M3/18

    摘要: A line card including: a co-channel estimator and a code selector. The line card is configured to couple to digital subscriber lines to support multi-tone modulation of communications channels thereon. The co-channel estimator is configured to estimate co-channel crosstalk coupling coefficients among selected pairs of the subscriber lines at levels for which the total crosstalk into a selected victim line among the plurality of digital subscriber lines substantially corresponds to the sum of the products of the corresponding crosstalk coupling coefficient for each remaining disturber one of the plurality of subscriber lines and a corresponding substantially unique vector transmitted thereon. The code selector couples to the co-channel estimator. The code selector is configured to select a cross-talk estimation code type and to generate substantially unique code vectors derived there from for injection into selected ones of the of subscriber lines.

    摘要翻译: 线卡,包括:同频道估计器和代码选择器。 线卡被配置为耦合到数字用户线路以支持其上的通信信道的多音调制。 共信道估计器被配置为在多个数字用户线路中对所选择的受害线路的总串扰基本上对应于多个用户线路的选择对的总和之间的估计中,估计选择的用户线路中的同频道串扰耦合系数 多个用户线路中的每个剩余干扰一个的相应串扰耦合系数和在其上传输的对应的基本唯一的向量。 代码选择器耦合到同信道估计器。 代码选择器被配置为选择串扰估计代码类型并且生成从其导出的基本上唯一的代码向量用于注入用户线中的选定的代码。

    OFDM receiver and method for decoding OFDM symbols of two or more data streams with reduced multiplication operations
    2.
    发明授权
    OFDM receiver and method for decoding OFDM symbols of two or more data streams with reduced multiplication operations 有权
    OFDM接收机和用于解码具有减少的乘法运算的两个或多个数据流的OFDM符号的方法

    公开(公告)号:US07881391B2

    公开(公告)日:2011-02-01

    申请号:US11615722

    申请日:2006-12-22

    摘要: Embodiments of an OFDM receiver and methods for decoding OFDM symbols of two or more data streams with reduced multiplication operations are generally described herein. Other embodiments may be described and claimed. In some embodiments, one or more terms of a modified L2-squared-norm cost function are precomputed and stored for predetermined complex symbol values of one or more tones of OFDM symbols prior to performing a searching process. During the searching process, the cost function is computed using the precomputed terms and received data symbols using shifting and adding operations, rather than multiplication operations. In other embodiments, non-L2-squared-norm cost functions are used.

    摘要翻译: OFDM接收机的实施例和用于解码具有减小的乘法运算的两个或多个数据流的OFDM符号的方法在本文中一般地被描述。 可以描述和要求保护其他实施例。 在一些实施例中,在执行搜索过程之前,对经修改的L2平方规范成本函数的一个或多个项进行预计算并存储用于OFDM符号的一个或多个音调的预定复符号值。 在搜索过程中,使用预计算项和使用移位和相加操作的接收数据符号来计算成本函数,而不是乘法运算。 在其他实施例中,使用非L2平方规范成本函数。

    OFDM RECEIVER AND METHOD FOR DECODING OFDM SYMBOLS OF TWO OR MORE DATA STREAMS WITH REDUCED MULTIPLICATION OPERATIONS
    7.
    发明申请
    OFDM RECEIVER AND METHOD FOR DECODING OFDM SYMBOLS OF TWO OR MORE DATA STREAMS WITH REDUCED MULTIPLICATION OPERATIONS 有权
    用于解码具有减少的多路复用操作的两个或多个数据流的OFDM符号的OFDM接收器和方法

    公开(公告)号:US20080152027A1

    公开(公告)日:2008-06-26

    申请号:US11615722

    申请日:2006-12-22

    IPC分类号: H04K1/10

    摘要: Embodiments of an OFDM receiver and methods for decoding OFDM symbols of two or more data streams with reduced multiplication operations are generally described herein. Other embodiments may be described and claimed. In some embodiments, one or more terms of a modified L2-squared-norm cost function are precomputed and stored for predetermined complex symbol values of one or more tones of OFDM symbols prior to performing a searching process. During the searching process, the cost function is computed using the precomputed terms and received data symbols using shifting and adding operations, rather than multiplication operations. In other embodiments, non-L2-squared-norm cost functions are used.

    摘要翻译: OFDM接收机的实施例和用于解码具有减小的乘法运算的两个或多个数据流的OFDM符号的方法在本文中一般地被描述。 可以描述和要求保护其他实施例。 在一些实施例中,在执行搜索过程之前,对经修改的L 2 -Squared-norm成本函数的一个或多个项进行预计算并存储用于OFDM符号的一个或多个音调的预定复符号值。 在搜索过程中,使用预计算项和使用移位和相加操作的接收数据符号来计算成本函数,而不是乘法运算。 在其它实施例中,使用非L 2 - 标准规范成本函数。