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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 26 — Dec. 10, 2012
  • pp: B543–B551

Real-time OFDM or Nyquist pulse generation – which performs better with limited resources?

R. Schmogrow, R. Bouziane, M. Meyer, P. A. Milder, P. C. Schindler, R. I. Killey, P. Bayvel, C. Koos, W. Freude, and J. Leuthold  »View Author Affiliations


Optics Express, Vol. 20, Issue 26, pp. B543-B551 (2012)
http://dx.doi.org/10.1364/OE.20.00B543


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Abstract

We investigate the performance and DSP resource requirements of digitally generated OFDM and sinc-shaped Nyquist pulses. The two multiplexing techniques are of interest as they offer highest spectral efficiency. The comparison aims at determining which technology performs better with limited processing capacities of state-of-the-art FPGAs. It is shown that a novel Nyquist pulse shaping technique, based on look-up tables requires lower resource count than equivalent IFFT-based OFDM signal generation while achieving similar performance with low inter-channel guard-bands in ultra-dense WDM. Our findings are based on a resource assessment of selected DSP implementations in terms of both simulations and experimental validations. The experiments were performed with real-time software-defined transmitters using a single or three optical carriers.

© 2012 OSA

OCIS Codes
(060.4080) Fiber optics and optical communications : Modulation
(060.4510) Fiber optics and optical communications : Optical communications

ToC Category:
Subsystems for Optical Networks

History
Original Manuscript: October 11, 2012
Revised Manuscript: November 24, 2012
Manuscript Accepted: November 24, 2012
Published: December 5, 2012

Virtual Issues
European Conference on Optical Communication 2012 (2012) Optics Express

Citation
R. Schmogrow, R. Bouziane, M. Meyer, P. A. Milder, P. C. Schindler, R. I. Killey, P. Bayvel, C. Koos, W. Freude, and J. Leuthold, "Real-time OFDM or Nyquist pulse generation – which performs better with limited resources?," Opt. Express 20, B543-B551 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-26-B543


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References

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