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    • 10. 发明申请
    • SEMI-DIGITAL DUPLEXING
    • 半数字双工
    • WO2006094832A1
    • 2006-09-14
    • PCT/EP2006/002279
    • 2006-03-13
    • INFINEON TECHNOLOGIES AGCLAUSEN, AxelOKSMAN, Vladimir
    • CLAUSEN, AxelOKSMAN, Vladimir
    • H04L5/14H04L27/26
    • H04L27/2607H04L5/143
    • The inventors have developed a DSL system that can employ digital duplexing for short loops while supporting communications over long loops. For short loops, the system aligns the data symbols at both ends and thereby performs two-way digital duplexing. For longer loops, the system performs semi-digital duplexing: the symbols are aligned for digital duplexing at one end of the loop while echo cancellation is employed at the other end. Over longer loops, the bandwidth for transmissions in one direction may be limited by the complexity of the echo canceller, however, the bandwidth for transmission in the other direction can remain as high as for short loops. Therefore, the system developed by the inventors allows high bandwidth transmission without the loop length limitation associated with conventional VDSL.
    • 本发明人已经开发了一种DSL系统,其可以在短循环中采用数字双工,同时支持长环路上的通信。 对于短循环,系统对齐两端的数据符号,从而执行双向数字双工。 对于较长的环路,系统执行半数字双工:在循环的一端对符号进行数字双工,另一端采用回波消除。 在更长的循环中,一个方向上的传输的带宽可能受到回波消除器的复杂度的限制,然而,在另一个方向上的传输带宽可以保持与短循环一样高。 因此,本发明人开发的系统允许高带宽传输,而不需要与常规VDSL相关的环路长度限制。