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Cybernetics and programming

Increasing Efficiency of the Coding Methods Used for Fiber-Optic Communication Lines

Teimurov Maksim Teimurovich

Master degree student of the Department of Computer Systems at Novosibirsk State University

630090, Russia, Novosibirsk Region, Novosibirsk, str. Pirogova, 2




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Abstract: The article is devoted to topical issues of coding in fiber-optic communication lines in the presence of the pattern effect, i.e. the effect of the dependence of the error rate in the process of information transfer on the kind of information. The object of the researh is the information coding methods. In his research Teymurov provides a general review of the coding methods used for fiber-optic communication lines with the pattern effect. Teymurov also analyzes disadvantages of the adaptive block coding method offered by A. S. Skidin and offers ways to eliminate them. The author examines the process of implementation of information coding methods based on the example of fiber-optic communcation lines. The author has also conducted the simulation of adaptive block coding and offered improvements for the multichannel high performance line with the signal modulation amplitude-difference method. The results have been analyzed and conclusions about applicability of the aforesaid codes. The author has developed new coding methods based on the adaptive block coding method offered by A. S. Skidin for communication lines with the pattern effect. The author has conducted a comparative analysis of these methods, the results of the analysis demonstrate that new methods eliminate more errors meanwhile the redundance and coding and decoding methods remain the same. The research aimed at the implementation of coding methods allow to use these methods not only for the aforesaid fiber-optic communication lines but also for any other lines with the pattern effect which proves the wide scope of the implementation of these methods. 

Keywords: nonlinear effect, pattern effect, intersymbol interaction, four-wave interaction, phasic cross-modulation, coding theory, adaptive block coding, constrained codes, information coding methods, fiber-optic communication lines
This article written in Russian. You can find full text of article in Russian here .

The Zettabyte Era—Trends and Analysis (stat'ya na saite Cisco) http://www.cisco.com/c/en/us/solutions/collateral/service-provider/visual-networking-index-vni/vni-hyperconnectivity-wp.html
Skidin A. S., Fedoruk M. P., Shafarenko A. V., Turitsyn S. K. Preodolenie pattern-effekta v optovolokonnykh liniyakh svyazi s pomoshch'yu adaptivnogo blochnogo kodirovaniya // Diskretnyi analiz i issledovanie operatsii. – 2010. – T. 17. – № 4. – S. 67-83.
Intersymbol interference (stat'ya na saite Wikipedia) https://en.wikipedia.org/wiki/Intersymbol_interference
Agrawal G. P. Nonlinear fiber optics. — New York: Acad. Press, 2001. — 467 p
Four-wave mixing (stat'ya na saite Wikipedia) https://en.wikipedia.org/wiki/Four-wave_mixing
Cross-phase modulation (stat'ya na saite Wikipedia) https://en.wikipedia.org/wiki/Cross-phase_modulation
Skidin A. S. Razrabotka effektivnykh metodov kodirovaniya dlya povysheniya propusknoi sposobnosti sovremennykh linii volokonno-opticheskoi svyazi // Avtoref. dis. kand. fiz.-mat. nauk. – Krasnoyarsk: SFU. – 2011. – 21 s.
Skidin A. S., Redyuk A. A., Shtyrina O. V., Fedoruk M. P., Shafarenko A. V. The Analysis of the Error Statistics in a 5x40 Gbit/s Fibre Link with Hybrid Amplification // Optics Communications. – 2011. – Vol. 284. – Issue 19. – P. 4695-4698
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