Computer Science – Information Theory
Scientific paper
2009-10-26
Computer Science
Information Theory
Presented at the IEEE Information Theory Workshop (ITW), Taormina, Italy, Oct. 2009
Scientific paper
The transmission of a Gaussian source over a block-fading multiple antenna channel in the presence of a feedback link is considered. The feedback link is assumed to be an error and delay free link of capacity 1 bit per channel use. Under the short-term power constraint, the optimal exponential behavior of the end-to-end average distortion is characterized for all source-channel bandwidth ratios. It is shown that the optimal transmission strategy is successive refinement source coding followed by progressive transmission over the channel, in which the channel block is allocated dynamically among the layers based on the channel state using the feedback link as an instantaneous automatic repeat request (ARQ) signal.
Goldsmith Andrea
Gunduz Deniz
Poor Harold Vincent
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