Discrete Multitone Modulation Using Wavelet
Date Issued
1999-07-31
Date
1999-07-31
Author(s)
DOI
882213E002080
Abstract
The DMT (discrete multitone modu-
lation) technique has been widely applied to data
transmission over fading channels of twisted pairs.
It has been shown that the DMT system with ideal
lters can achieve within 8 to 9 dB of the channel
capacity of ADSL. The DFT based DMT system is
proposed as a practical DMT implementation but
its optimality is never asserted. In this report we
will show that the DFT based DMT systems are
asymptotically optimal although they are not opti-
mal for nite number of channels. The DFT based
DMT system and the DMT system with ideal l-
ters achieve the same bound. However, for a mod-
est number of channels the optimal transceiver can
provide substantial gain over the DFT based sys-
tem.
Subjects
transceiver
discrete multitone modu-
lation (DMT)
lation (DMT)
optimal DMT
Publisher
臺北市：國立臺灣大學電信工程學研究所
Type
report
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882213E002080.pdf
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