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Performance Evaluation of a Novel Converged Architecture for Digital-Video Transmission Over Optical Wireless Channels

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3 Author(s)
Cvijetic, N. ; Univ. of Virginia, Charlottesville ; Wilson, S.G. ; Zarubica, R.

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.

Published in:

Lightwave Technology, Journal of  (Volume:25 ,  Issue: 11 )

Date of Publication:

Nov. 2007

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