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    • 100. 发明授权
    • DSL rate adaptation
    • DSL速率适配
    • US06310909B1
    • 2001-10-30
    • US09309340
    • 1999-05-11
    • David Jones
    • David Jones
    • H04B138
    • H04L5/0064H04L5/0007H04L5/0046H04L5/006H04L5/023H04L5/143H04L27/2608
    • A method for enhancing the bit rate and/or margin at which quadrature amplitude modulation (QAM) communication is performed includes the steps of varying a spectral allocation and constellation size with which communication is performed, so as to define a combination of spectral allocation and constellation size at which the bit rate and/or margin are enhanced. The spectral allocation can be varied by varying a stop frequency thereof, while maintaining a substantially constant start frequency, so as to mitigate undesirable high frequency content of the bandwidth. Alternatively, both start and stop frequencies may be varied.
    • 用于增强正交幅度调制(QAM)通信的比特率和/或余量的方法包括以下步骤:改变进行通信的频谱分配和星座大小,以便定义频谱分配和星座的组合 比特率和/或边缘增强的大小。 频谱分配可以通过改变其停止频率而改变,同时保持基本恒定的起始频率,以便减轻带宽的不需要的高频内容。 或者,起始频率和停止频率都可以变化。