LDPC-coded orbital angular momentum (OAM) modulation for free-space optical communication
2010; Optica Publishing Group; Volume: 18; Issue: 24 Linguagem: Inglês
10.1364/oe.18.024722
ISSN1094-4087
AutoresIvan B. Djordjević, Murat Arabaci,
Tópico(s)Optical Polarization and Ellipsometry
ResumoAn 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.
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