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BIBTEX RIS

Sequence and spread spectrum time domain reflectometry for transmission line analysis

2007; SPIE; Linguagem: Inglês

10.1117/12.735873

ISSN

1996-756X

Autores

Jacklyn D. Reis, Agostinho Castro, João C. W. A. Costa, Jaume Rius i Riu, Klas Ericson,

Tópico(s)

Full-Duplex Wireless Communications

Resumo

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.

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