A novel common-mode noise cancellation technique for VDSL applications

被引:13
|
作者
Yeap, TH [1 ]
Fenton, DK [1 ]
Lefebvre, PD [1 ]
机构
[1] Univ Ottawa, Sch Informat Technol & Engn, Ottawa, ON K1N 6N5, Canada
关键词
common-mode noise; differential-mode signal; digital subscriber loop; noise cancellation; radio frequency interference; very-high-speed digital subscriber loop (VDSL); Wiener filter;
D O I
10.1109/TIM.2003.816850
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Very-high-speed digital subscriber loop modems operate in frequency bands, which coincide with many significant radio-frequency interference sources, particularly commercial AM radio. In these bands, the balance of most twisted-pair cables is low enough to allow substantial interference to transfer to differential mode, disrupting the transmitted information signal. A novel wideband common-mode noise cancellation technique is presented. Simulation results show that the common-mode noise cancellation technique could provide 20- to 30-dB improvement in those radio frequency bands. Construction and testing of a hardware prototype are also presented. With finite-precision effects, measured test results show that common-mode noise cancellation in the order of 15-20 dB is achievable.
引用
收藏
页码:1325 / 1334
页数:10
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