Asymptotic Distortion Performance of Source-Channel Diversity Schemes over Relay Channels

— Diversity techniques are an effective answer to the challenges presented by fading channels. This paper focuses on studying the performance of systems with diversity of three forms: source coding diversity, channel coding diversity, and user-cooperation diversity. To best reflect a focus on real-time multimedia communications, performance is measured through the distortion exponent, which measures the rate of decay of the end-to-end distortion at high SNRs. User-cooperation diversity takes the form of a relay channel implemented with amplify-andforward processing at the relay. The results show that channel coding diversity provides the best performance, followed by source coding diversity. The results also show a tradeoff between the quality (resolution) of the source encoder and the amount of cooperation (number of relay nodes).

• Type: Conference
• Year: 2008
• Where: WCNC
• Authors: Karim G. Seddik, Andres Kwasinski, K. J. Ray Liu
• Keywords: Channel Coding Diversity, Source Coding Diversity, User-cooperation Diversity, WCNC 2008, Wireless Networks