Abstract
A robust channel coding architecture for multigigabit-per-second digital-video transmission over the optical
wireless channel is introduced and evaluated. The proposed scheme combines low-density parity-check coding with
channel interleaving to improve the transmission over turbulent temporally correlated optical wireless channels
while satisfying real-time video delay constraints. Frame error rates of the presented code design are evaluated via
simulation for intensity-modulation/direct-detection optical wireless links in both lognormal- and Rayleigh-fading
channels. Results indicate that the performance of the proposed system is effective across a large range of
atmospheric turbulence strengths and achieves significant temporal diversity in moderately long (10 ms) temporal
correlation times while satisfying a 0.3-s real-time delay constraint. Moreover, the proposed design is shown to
outperform the Reed–Solomon codes prevalent in the legacy fiber and wireless digital-television distribution
systems.
© 2007 IEEE
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