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    • 51. 发明申请
    • DSL NOISE CANCELLATION
    • DSL噪音消除
    • US20120051410A1
    • 2012-03-01
    • US13254454
    • 2009-03-04
    • Mark B. FlowersMark MalloryMark BradyJohn M. CioffiMehdi Mohseni
    • Mark B. FlowersMark MalloryMark BradyJohn M. CioffiMehdi Mohseni
    • H04L25/08H04L5/16H04B17/00
    • H04B3/32H04B1/7107H04J11/004H04L27/2647H04N7/102
    • A method and apparatus in a noise cancellation system that receives a noise reference signal via a noise reference signal input port, and performs at least one of procedures a and b set forth below for reducing noise in a DSL data signal transmitted on a DSL transmission line to which the noise cancellation system is coupled: a.i.) creating a noise free representation of a DSL synchronization symbol repeatedly occurring in the transmitted DSL data signal, and a.ii.) reducing the noise in the transmitted DSL data signal based on the noise free representation of the DSL synchronization symbol and the received noise reference signal, and b.i.) analyzing at least one of the received noise reference signal and the transmitted DSL data signal to identify one or more frequency bands in which to de-emphasize noise cancellation in the transmitted DSL data signal, and b.ii.) causing the noise cancellation system to de-emphasize noise cancellation in the identified one or more frequency bands of the transmitted DSL data signal, responsive to the analysis.
    • 一种噪声消除系统中的方法和装置,其经由噪声参考信号输入端口接收噪声参考信号,并执行以下步骤a和b中的至少一个,以减少在DSL传输线路上发送的DSL数据信号中的噪声 噪声消除系统被耦合到其上:ai)创建在所发送的DSL数据信号中重复发生的DSL同步符号的无噪声表示,以及a)基于无噪声来减少发送的DSL数据信号中的噪声 DSL同步符号和接收到的噪声参考信号的表示,以及bi)分析接收到的噪声参考信号和所发送的DSL数据信号中的至少一个,以识别在所发送的DSL数据信号中去除强调噪声消除的一个或多个频带 DSL数据信号和b.ii.),使得噪声消除系统在所识别的一个或多个频带中去强调噪声消除 发送的DSL数据信号,响应于分析。