Fast and robust blind chromatic dispersion estimation using auto-correlation of signal power waveform for digital coherent systems

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48 Citations (Scopus)

Abstract

We propose a chromatic dispersion (CD) estimation technique by using the auto-correlation of signal power waveform for DSP based coherent systems. For single-carrier polarization-division-multiplexed (PDM) systems assuming Gaussian pulse shapes, we analytically show that the auto-correlation of signal power waveform contains a peak whose location is indicative of the accumulated CD and is insensitive to amplified spontaneous emission (ASE) noise, laser frequency offset, laser phase noise and first-order polarization-mode dispersion (PMD) and applicable to single-carrier phase-shift keyed (PSK) and quadrature-amplitude modulation (QAM) systems. As a linear scan of a preset range of CD is not needed, the number of symbols of the proposed technique is dramatically reduced. Simulation results show that to estimate the link CD for 112 Gb/s PDM-QPSK and 224 Gb/s PDM-16-QAM systems, 8192 symbols are sufficient for NRZ/RZ pulse shapes and 32768 symbols are sufficient for root-raised-cosine pulse shapes with the roll-off factor as low as 0.1 with estimation error below 175 ps/nm and 400 ps/nm, respectively.
Original languageEnglish
Article number6375746
Pages (from-to)306-312
Number of pages7
JournalJournal of Lightwave Technology
Volume31
Issue number2
DOIs
Publication statusPublished - 4 Jan 2013

Keywords

  • Autocorrelation
  • chromatic dispersion
  • coherent detection
  • digital signal processing

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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