Energy-Distortion Tradeoffs in Gaussian Joint Source-Channel Coding Problems

The information-theoretic notion of energy efficiency is studied in the context of various joint source-channel coding problems. The minimum transmission energy E(D) required to communicate a source over a noisy channel so that it can be reconstructed within a target distortion D is analyzed. Unlike the traditional joint source-channel coding formalisms, no restrictions are imposed on the number of channel uses per source sample. It is also shown that simple uncoded transmission schemes perform better than the separation-based schemes in many different regimes, both with and without feedback.

Provided by: Institute of Electrical & Electronic Engineers Topic: Networking Date Added: May 2012 Format: PDF

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