On the multidimensional signal constellation design for few-mode-fiber-based high-speed optical transmission

Ivan B Djordjevic, Tao Liu, Lei Xu, Ting Wang

Research output: Contribution to journalArticle

12 Scopus citations


In this paper, we propose an algorithm to determine the D-dimensional optimum signal constellation design (DD-OSCD), in minimum mean-square error sense, for channel capacity achieving source distribution. We then describe a D = 4-dimensional coded modulation scheme, employing N orbital angular momentum modes, two polarization states, and two in-phase/quadrature coordinates, suitable for use in future few-mode fiber (FMF) applications. Monte Carlo simulations indicate that the proposed low-density parity-check (LDPC)-coded polarization-division-multiplexed (PDM) quadrature-multiplexed (QM) DD-OSCD significantly outperforms conventional PDM-QAM (by 4.32 dB for 64-ary 3-D constellation at a BER of 10 -7). In addition, the DD-OSCD outperforms sphere packing constellations (by 0.33 dB for 8-ary 3-D constellation at a BER of 10 -7).

Original languageEnglish (US)
Article number6243161
Pages (from-to)1325-1332
Number of pages8
JournalIEEE Photonics Journal
Issue number5
Publication statusPublished - 2012



  • few-mode/few-core fiber optics ommunications
  • low-density parity-check (LDPC) codes
  • Microwave photonics signal processing
  • multidimensional coded modulation
  • orbital angular momentum (OAM) modulation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

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