Title :
Distortion exponent in MIMO channels with feedback
Author :
Gunduz, Deniz ; Goldsmith, Andrea ; Poor, H. Vincent
Author_Institution :
Dept. of Electr. Eng., Princeton Univ., Princeton, NJ, USA
Abstract :
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.
Keywords :
Gaussian channels; MIMO communication; antenna arrays; automatic repeat request; channel allocation; channel capacity; combined source-channel coding; fading channels; Gaussian source transmission; MIMO channel; automatic repeat request; block fading multiple antenna channel; channel block allocation; distortion exponent; feedback link; instantaneous ARQ signal; optimal exponential behavior; source coding; source-channel bandwidth ratio; Automatic repeat request; Bandwidth; Channel state information; Delay; Distortion measurement; Fading; MIMO; State feedback; Tin; Transmitters;
Conference_Titel :
Information Theory Workshop, 2009. ITW 2009. IEEE
Conference_Location :
Taormina
Print_ISBN :
978-1-4244-4982-8
Electronic_ISBN :
978-1-4244-4983-5
DOI :
10.1109/ITW.2009.5351220
