Per tone shaping filters for DMT transmitters

被引：0
|
作者：
Chen, CY [1 ]
Phoong, SM [1 ]
机构：
[1] Natl Taiwan Univ, Dept EE, Taipei 106, Taiwan
来源：
2004 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, VOL IV, PROCEEDINGS: AUDIO AND ELECTROACOUSTICS SIGNAL PROCESSING FOR COMMUNICATIONS | 2004年
关键词：
D O I：
暂无
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
Discrete MultiTone (DMT) modulation has been widely adopted for wideband transmission over digital subscriber loop (DSL) channels. In the conventional DMT system, the transmitting filters are the DFT filters. DFT filters suffer from poor frequency responses. Hence the resulting transmit signal has a large spectral sidelobe and its power spectral density (PSD) decays at a rate of 1/f only. In this paper, we propose a modified DMT scheme with improved transmitting filters. In the proposed system, shaping filters are applied to improve the frequency responses of the transmitting filters. Moreover, an efficient implementation of the proposed system is derived. Experiment shows that for VDSL applications, the proposed system has a very satisfactory spectral efficiency.
引用
收藏
页码：1061 / 1064
页数：4
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