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Robust wireless image transmission using jointly-optimized modulation and source coding

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3 Author(s)
A. Doufexi ; Centre for Commun. Res., Bristol Univ., UK ; A. Nix ; D. Bull

An orthogonal frequency division multiplexing (OFDM) system is an effective technique for high data rate transmission over wideband multipath fading channels. A robust image transmission system is proposed, based on a Reed-Solomon (RS) coded 16-QAM OFDM scheme. This system comprises a vector quantization (VQ) source encoder with a compression rate of 16. The data is encoded using a Reed-Solomon block code and mapped onto a 16-QAM constellation. The parameters of the codebook have been optimized for 16-QAM. It is shown, through simulations, that the combination of OFDM and Reed-Solomon coding makes the system robust to errors. Results indicate that the joint optimization of source coding and QAM minimizes the visual artifacts that result from channel induced errors

Published in:

Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st  (Volume:3 )

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