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Publication Detail
Real-time OFDM or Nyquist pulse generation-which performs better with limited resources
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Conference Proceeding
  • Authors:
    Schmogrow R, Bouziane R, Meyer M, Milder PA, Schindler PC, Killey RI, Bayvel P, Koos C, Freude W, Leuthold J
  • Publication date:
  • Journal:
    Optics Express
  • Volume:
  • Issue:
  • Status:
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 interchannel 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 Optical Society of America.
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