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Phase noise influence in long-range coherent optical OFDM systems with delay detection, IFFT multiplexing and FFT demodulation
RISE, Swedish ICT, Acreo.
RISE, Swedish ICT, Acreo. KTH Royal Institute of Technology, Sweden; Tianjin University, China.
KTH Royal Institute of Technology, Sweden.
Aston University, UK.
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2012 (English)In: Journal of optical communications, ISSN 0173-4911, E-ISSN 2191-6322, Vol. 33, no 4, p. 289-295Article in journal (Refereed) Published
Abstract [en]

We present a study of the influence of dispersion induced phase noise for CO-OFDM systems using FFT multiplexing/IFFT demultiplexing techniques (software based). The software based system provides a method for a rigorous evaluation of the phase noise variance caused by Common Phase Error (CPE) and Inter-Carrier Interference (ICI) including - for the first time to our knowledge - in explicit form the effect of equalization enhanced phase noise (EEPN). This, in turns, leads to an analytic BER specification. Numerical results focus on a CO-OFDM system with 10-25 GS/s QPSK channel modulation. A worst case constellation configuration is identified for the phase noise influence and the resulting BER is compared to the BER of a conventional single channel QPSK system with the same capacity as the CO-OFDM implementation. Results are evaluated as a function of transmission distance. For both types of systems, the phase noise variance increases significantly with increasing transmission distance. For a total capacity of 400 (1000) Gbit/s, the transmission distance to have the BER < 10-2 for the worst case CO-OFDM design is less than 800 and 460 km, respectively, whereas for a single channel QPSK system it is less than 1400 and 560 km.

Place, publisher, year, edition, pages
2012. Vol. 33, no 4, p. 289-295
Keywords [en]
Coherent systems, Orthogonal frequency division multiplexed systems, Phase noise, RF pilot carrier, Channel modulation, Coherent system, Common phase errors, Explicit form, Intercarrier interference, Multiplexed systems, Noise influence, Noise variance, Numerical results, Optical OFDM, Pilot carrier, Rigorous evaluation, Single channels, Software-based, Transmission distances, Fast Fourier transforms, Telecommunication systems, Orthogonal frequency division multiplexing
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:ri:diva-51147DOI: 10.1515/joc-2012-0047Scopus ID: 2-s2.0-84872702059OAI: oai:DiVA.org:ri-51147DiVA, id: diva2:1514436
Available from: 2021-01-05 Created: 2021-01-05 Last updated: 2021-01-07Bibliographically approved

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