Method and device for controlling signal clipping in a discrete multi-tone communications system
    7.
    发明授权
    Method and device for controlling signal clipping in a discrete multi-tone communications system 失效
    用于在离散多音通信系统中控制信号限幅的方法和装置

    公开(公告)号:US06366555B1

    公开(公告)日:2002-04-02

    申请号:US09083794

    申请日:1998-05-22

    IPC分类号: H04J1100

    摘要: A method of controlling the transmission amplitude of signals in a DMT communications system limited by a predefined dynamic range is disclosed. A block of bits is converted to a set of M constellation points in the fourier domain. The M constellation points are then mapped to a set of N complex points, wherein M is less than N, the N complex fitting within transmission subspace of the dynamic range of the system.

    摘要翻译: 公开了一种控制由预定动态范围限制的DMT通信系统中的信号的传输幅度的方法。 一个比特块被转换成一个在四元域中的一个M个星座点。 然后将M个星座点映射到一组N个复点,其中M小于N,N系统拟合在系统的动态范围的传输子空间内。

    Methods and device for estimating and correcting clipping in a discrete multi-tone communications system
    8.
    发明授权
    Methods and device for estimating and correcting clipping in a discrete multi-tone communications system 失效
    用于在离散多音通信系统中估计和校正限幅的方法和装置

    公开(公告)号:US06363109B1

    公开(公告)日:2002-03-26

    申请号:US09076418

    申请日:1998-05-12

    IPC分类号: H04B138

    摘要: A method for obtaining a reliable estimate of the transmitter clipping error compliant with T1.413 ADSL standard is disclosed. An architecture is disclosed that uses the clipping error estimate at the receiver to reconstruct a frequency-domain compensation signal. The method for computing the compensation signal is disclosed along with an asymmetric digital subscriber line modem supporting T1.413 standard transmission/reception functions over a discrete multi-tone communications system capable of estimating clipping errors and computing clipping compensation signals.

    摘要翻译: 公开了一种用于获得符合T1.413 ADSL标准的发射机限幅误差的可靠估计的方法。 公开了一种结构,其使用接收机处的限幅误差估计来重建频域补偿信号。 公开了一种用于计算补偿信号的方法以及支持T1.413标准发送/接收功能的非对称数字用户线路调制解调器,该分立多音调通信系统能够估计削波误差并计算削波补偿信号。