Distortion exponents for decode-and-forward multi-relay cooperative networks
ISIT'09 Proceedings of the 2009 IEEE international conference on Symposium on Information Theory - Volume 2
Cooperative layered video multicast using randomized distributed space time codes
INFOCOM'09 Proceedings of the 28th IEEE international conference on Computer Communications Workshops
IEEE Transactions on Wireless Communications
Hybrid digital-analog relaying for cooperative transmission over slow fading channels
IEEE Transactions on Information Theory
Secure joint source-channel coding for quasi-static fading channels
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Analog source exchange with the help of a relay
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Minimum sum expected distortion in cooperative networks
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Optimized low-delay source-channel-relay mappings
IEEE Transactions on Communications
Multi-hop MIMO relay networks: diversity-multiplexing trade-off analysis
IEEE Transactions on Wireless Communications
ICACT'10 Proceedings of the 12th international conference on Advanced communication technology
Source-channel rate optimization for progressive image transmission over block fading relay channels
IEEE Transactions on Communications
On the distortion exponents of layered broadcast transmission in multi-relay cooperative networks
IEEE Transactions on Signal Processing
Research challenges towards the Future Internet
Computer Communications
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User cooperation is a powerful tool to combat fading and increase robustness for communication over wireless channels. Although it is doubtless a promising technique for enhancing channel reliability, its performance in terms of average source distortion is not clear since source-channel separation theorem fails under the most common nonergodic slow-fading channel assumption, when channel state information (CSI) is only available at the receiving terminals. This work sheds some light on the end-to-end performance of joint source-channel coding for cooperative relay systems in the high signal-to-noise ratio (SNR) regime. Considering distortion exponent as a figure of merit, we propose various strategies for cooperative source and channel coding that significantly improve the performance compared to the conventional scheme of source coding followed by cooperative channel coding. We characterize the optimal distortion exponent of a full-duplex relay channel for all bandwidth ratios. For the half-duplex relay channel, we provide an upper bound which is tight for small and large bandwidth ratios. We consider the effect of correlated side information on the distortion exponent as well.