| Summary: | 碩士 === 中華大學 === 電機工程學系碩士班 === 87 === ABSTRACT
Because the development of broad-band networks is motivated . Since , several technologies and architectures have been under investigation for the local loop.
The ADSL techniques are presented .This is typically the case for multimedia interactive services for which the end user accesses a server through the public network .The VDSL technique is extension of ADSL and is under for standardization at ETSI
In this paper . First , we will study VDSL techniques on the structure of DMT. we created a simulation model ,and take a simulation , evaluate the capacity in the different noise environment and channel distance, base on the spec. ANSI T1E1.
Additional ,we will study on DWMT structure and then seek the high level filter band.
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