Journal Article10.1049/EL:19900046
Complementary correlation OTDR with three codewords
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TL;DR: A complementary correlation OTDR technique based on probing with only three codewords and processing with onlyThree correlations is presented, for any power of two code length.
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Abstract: A complementary correlation OTDR technique based on probing with only three codewords and processing with only three correlations is presented, for any power of two code length.
read more
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Citations
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Using simplex codes to improve OTDR sensitivity
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Distributed temperature sensor system based on raman scattering using correlation-codes
Marcelo A. Soto,Prasant Kumar Sahu,Stefano Faralli,Gabriele Bolognini,F. Di Pasquale,B. Nebendahl,C. Rueck +6 more
TL;DR: A distributed sensor system employing spontaneous Raman scattering with use of correlation-coding techniques and a single-detector scheme is discussed and experimentally characterised.
Direct Detection and Coherent Optical Time-Domain Reflectometry With Golay Complementary Codes
TL;DR: In this article, the authors extend the Golay coded Optical Time Domain Reflectometry OTDR technique for the first time from direct-detection to coherent OTDR, investigating the unique issues arising in the coherent setting regarding signal processing operations and efficient real-time implementation of the DSP in practical coherent OPDR receivers and the resulting OTDR performance.
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Harnessing oversampling in correlation-coded OTDR.
TL;DR: It is revealed that oversampling after photodetection opens up a new dimension for coded OTDR other than code length and code type and can serve to update existing instruments based on correlation-coded OTDR in a straightforward manner and at a relatively low cost.
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References
Complementary series
M. Golay
- 01 Apr 1961
TL;DR: These series, which were originally conceived in connection with the optical problem of multislit spectrometry, also have possible applications in communication engineering, for when the two kinds of elements of these series are taken to be +1 and -1, it follows immediately from their definition that the sum of their two respective autocorrelation series is zero everywhere, except for the center term.
1.6K
Real-time long range complementary correlation optical time domain reflectometer
Moshe Nazarathy,Steven A. Newton,R.P. Giffard,D.S. Moberly,F. Sischka,W. R. Trutna,S. Foster +6 more
TL;DR: In this article, the improved performance of an optical time-domain reflectometer (OTDR) through the application of a correlation technique using codes with complementary autocorrelation properties is discussed.
252
Optical orthogonal pulse compression codes by hopping
TL;DR: In this paper, a simple digital processing technique for using standard M sequences or quadratic residue codes in such a way that their optical correlation is truly orthogonal is described.
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Complementary code sets for OTDR
TL;DR: It is shown that (0,1) pulse compression code sets with zero resultant correlation sidelobes must comprise at least three codewords, and examples of such code setsWith word lengths up to 10 bits are given.
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