LDPC coded OFDM over the atmospheric turbulence channel | Zendy

Ivan B. Djordjević | Zendy; Bane Vasić | Zendy; Mark A. Neifeld | Zendy

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LDPC coded OFDM over the atmospheric turbulence channel

Author(s) -

Ivan B. Djordjević,

Bane Vasić,

Mark A. Neifeld

Publication year - 2007

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.15.006336

Subject(s) - low density parity check code , phase shift keying , coding gain , orthogonal frequency division multiplexing , keying , bit error rate , forward error correction , quadrature amplitude modulation , physics , electronic engineering , spectral efficiency , optics , computer science , telecommunications , decoding methods , channel (broadcasting) , engineering

Low-density parity-check (LDPC) coded optical orthogonal frequency division multiplexing (OFDM) is shown to significantly outperform LDPC coded on-off keying (OOK) over the atmospheric turbulence channel in terms of both coding gain and spectral efficiency. In the regime of strong turbulence at a bit-error rate of 10(-5), the coding gain improvement of the LDPC coded single-side band unclipped-OFDM system with 64 sub-carriers is larger than the coding gain of the LDPC coded OOK system by 20.2 dB for quadrature-phase-shift keying (QPSK) and by 23.4 dB for binary-phase-shift keying (BPSK).

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