LDPC-coded orbital angular momentum (OAM) modulation for free-space optical communication

Ivan B. Djordjevic, Murat Arabaci

Research output: Contribution to journalArticlepeer-review

97 Scopus citations


An orbital angular momentum (OAM) based LDPC-coded modulation scheme suitable for use in FSO communication is proposed. We demonstrate that the proposed scheme can operate under strong atmospheric turbulence regime and enable 100 Gb/s optical transmission while employing 10 Gb/s components. Both binary and nonbinary LDPC-coded OAM modulations are studied. In addition to providing better BER performance, the nonbinary LDPC-coded modulation reduces overall decoder complexity and latency. The nonbinary LDPC-coded OAM modulation provides a net coding gain of 9.3 dB at the BER of 10-8. The maximum-ratio combining scheme outperforms the corresponding equal-gain combining scheme by almost 2.5 dB.

Original languageEnglish (US)
Pages (from-to)24722-24728
Number of pages7
JournalOptics Express
Issue number24
StatePublished - Nov 22 2010

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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