LDPC-coded OAM modulation and multiplexing for deep-space and near-Earth optical communications

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

In order to achieve multi-gigabit transmission (projected for 2020) for the use in interplanetary communications, the usage of large number of time slots in pulse-position modulation (PPM), typically used in deep-space applications, is needed, which imposes stringent requirements on system design and implementation. As an alternative satisfying high-bandwidth demands of future interplanetary communications, while keeping the system cost and power consumption reasonably low, in this invited paper, we describe the use of orbital angular momentum (OAM) as an additional degree of freedom. The OAM is associated with azimuthal phase of the complex electric field. Because OAM eigenstates are orthogonal the can be used as basis functions for multidimensional signaling. The OAM modulation and multiplexing can, therefore, be used, in combination with other degrees of freedom, to solve the high-bandwidth requirements of future deep-space and near-Earth optical communications. The main challenge for OAM deep-space communication represents the link between a spacecraft probe and the Earth station because in the presence of atmospheric turbulence the orthogonality between OAM states is not longer preserved. We will show that in combination with LDPC codes, the OAM-based modulation schemes can operate even under strong atmospheric turbulence regime.

Original languageEnglish (US)
Title of host publication2011 International Conference on Space Optical Systems and Applications, ICSOS'11
Pages325-333
Number of pages9
DOIs
StatePublished - Jun 28 2011
Event2011 International Conference on Space Optical Systems and Applications, ICSOS'11 - Santa Monica, CA, United States
Duration: May 11 2011May 13 2011

Publication series

Name2011 International Conference on Space Optical Systems and Applications, ICSOS'11

Other

Other2011 International Conference on Space Optical Systems and Applications, ICSOS'11
CountryUnited States
CitySanta Monica, CA
Period5/11/115/13/11

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Keywords

  • Atmospheric turbulence
  • Coded modulation
  • Deep-space optical communication
  • Free-space optical communication
  • Low-density parity-check (LDPC) codes
  • Modulation
  • Orbital angular momentum (OAM)

ASJC Scopus subject areas

  • Aerospace Engineering
  • Atomic and Molecular Physics, and Optics

Cite this

Djordjevic, I. B. (2011). LDPC-coded OAM modulation and multiplexing for deep-space and near-Earth optical communications. In 2011 International Conference on Space Optical Systems and Applications, ICSOS'11 (pp. 325-333). [5783692] (2011 International Conference on Space Optical Systems and Applications, ICSOS'11). https://doi.org/10.1109/ICSOS.2011.5783692