A combined DMT/DWMT system for DSL application

被引:2
作者
Xie, YZ [1 ]
Reddy, VU [1 ]
Ko, CC [1 ]
机构
[1] Natl Univ Singapore, Dept Elect Engn, Singapore 119260, Singapore
关键词
multicarrier modulation; DMT; wavelet; DSL;
D O I
10.1016/S0165-1684(99)00120-6
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
A drawback of discrete multitone transmission (DMT) using discrete Fourier transform (DFT) bases as carriers is its sensitivity to narrow band interference. With overlapped orthogonal wavelet bases as carriers, discrete wavelet multitone transmission (DWMT) possesses better spectral containment than the DFT-based DMT, and can achieve a high level of immunity to narrow band interference at the cost of higher system delay and complexity. In this paper, we propose the use of overlapped pseudo-orthogonal bases for DWMT, which can be easily implemented on current DMT system. The resulting combined system can adapt itself to different channel environments by selecting the better transmission mode From DMT and DWMT, thereby combating narrow band interference effectively. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:185 / 195
页数:11
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