Sequence and spread spectrum time domain reflectometry for transmission line analysis

Jacklyn Reis; Agostinho L. S. Castro; João C. W. A. Costa; Jaume R. I. Riu; Klas Ericson

doi:10.1117/12.735873

10 September 2007 Sequence and spread spectrum time domain reflectometry for transmission line analysis

Jacklyn Reis, Agostinho L. S. Castro, João C. W. A. Costa, Jaume R. I. Riu, Klas Ericson

Author Affiliations +

Proceedings Volume 6776, Broadband Access Communication Technologies II; 67760L (2007) https://doi.org/10.1117/12.735873
Event: Optics East, 2007, Boston, MA, United States

Abstract

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.

Citation Download Citation

Jacklyn Reis, Agostinho L. S. Castro, João C. W. A. Costa, Jaume R. I. Riu, and Klas Ericson "Sequence and spread spectrum time domain reflectometry for transmission line analysis", Proc. SPIE 6776, Broadband Access Communication Technologies II, 67760L (10 September 2007); https://doi.org/10.1117/12.735873

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