Design of DMT Baseband Processing Architecture for High-Speed DSL
Date Issued
2001-07-31
Date
2001-07-31
Author(s)
DOI
892218E002080
Abstract
In this paper, a transceiver design for VDSL
standard using the DMT(Discrete Multi-Tone)
modulation is proposed. The design is based
on ETSI VDSL standard, which is for very
high speed digital subscriber loop. Recently,
the need for high-speed data transmission
increases rapidly, especially in the
application of net-meeting, video on demand,
video phone, etc. The DSL technology is
proposed to achieve broadband access by
transmitting data on existing telephone
network instead of using fiber all the way to
the residence, which is more costly. Basic
principles of DMT and its related issues are
illustrated in the paper. Besides, the
important features and parameters of ETSI
VDSL standard are also introduced. By
taking the non-idealities in the transmission
environment into consideration, a transceiver
architecture is proposed and verified by
functional simulations and is able to combat
those impairment in subscriber lines. For
hardware implementation, fixed-point
simulation of the proposed transceiver
architecture was conducted to determine
word length of important signals in the
architecture with a view to reducing the
circuit complexity and resources requirement
without incurring too much performance loss.
Finally, the main functional blocks are
implemented by FPGA to verify their
functionality.
Subjects
transceivers
Publisher
臺北市：國立臺灣大學電機工程學系暨研究所
Type
report
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