Sequence and Spread Spectrum Time Domain Reflectometry for transmission line analysis

被引：8

作者：

Reis, Jacklyn ^{[1
]}

Castro, Agostinho L. S. ^{[2
]}

Costa, Joao C. W. A. ^{[1
]}

Riu, Jaume R. I. ^{[3
]}

Ericson, Klas ^{[3
]}

机构：

[1] Fed Univ Para, Appl Electromagnetism Lab, DEEC, Belem, Para, Brazil

[2] Fed Univ Para, Signal Proc Lab, DEEC, Belem, Para, Brazil

[3] Ericsson, Stockholm, Sweden

来源：

BROADBAND ACCESS COMMUNICATION TECHNOLOGIES II | 2007年 / 6776卷

关键词：

loop qualification; digital subscriber line; sequence time domain reflectometry; spread spectrum;

D O I：

10.1117/12.735873

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

This paper describes Sequence Time Domain Reflectometry (STDR) and Spread Spectrum Time Domain Reflectometry (SSTDR), which utilizes concepts from direct sequence spread spectrum communications, as a technique for detecting impedance mismatches in telephone lines (twisted pair). The aim of this paper is to present methodologies for characterizing a subscriber loop, which is used for Digital Subscriber Line (DSL) technology, based on STDR and SSTDR tests. Those tests enable the TDR functionality to be incorporated into a DSL transceiver integrated circuit eliminating the need for costly test equipment. In addition to the cost savings, the characteristics of the STDR and SSTDR offer improved spectral compatibility, interference immunity and fault resolvability.

引用

页数：11

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