Title :
A robust fault detection algorithm for the improvement of OTDR sensitivity
Author :
Beghi, Alessandro ; Bertocco, Matteo
Author_Institution :
Dipartimento di Elettronica e Inf., Padova Univ., Italy
Abstract :
In the paper, an algorithm is presented for the detection of jump discontinuities in exponential signals buried in high level additive noise. It is employed as a post-processor in an optical time domain reflectometer (OTDR) to locate the position of discontinuities along the fiber. The proposed technique is based on a generalized likelihood ratio test applied to the innovation sequence resulting from Kalman filtering. A rigorous and thorough statistical analysis of the algorithm is reported, showing the achievable resolution together with the probability of error in the detection of faults
Keywords :
Kalman filters; error statistics; fault diagnosis; optical fibre communication; optical fibre testing; optical time-domain reflectometry; probability; random noise; state-space methods; statistical analysis; Kalman filtering; OTDR sensitivity; detection of faults; discontinuities; exponential signals; generalized likelihood ratio test; high level additive noise; jump discontinuities; optical time domain reflectometer; post-processor; probability of error; resolution; robust fault detection algorithm; statistical analysis; Additive noise; Fault detection; Filtering; Kalman filters; Noise robustness; Optical fiber filters; Optical fiber testing; Optical filters; Optical noise; Technological innovation;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1996. IMTC-96. Conference Proceedings. Quality Measurements: The Indispensable Bridge between Theory and Reality., IEEE
Conference_Location :
Brussels
Print_ISBN :
0-7803-3312-8
DOI :
10.1109/IMTC.1996.507282
