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Optimal Unequal Error Protection with User Cooperation for Transmission of Embedded Source-Coded Images

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Optimal Unequal Error Protection with User Cooperation for Transmission of Embedded Source-Coded Images
This paper studies the transmission of images encoded using an embedded source encoder over a wireless network allowing user cooperation. A dynamic programming algorithm is applied to optimally allocate to each source coded packet error protection in the form of a choice of channel code and a decision on the use of cooperation. The results show that for degraded source-destination channels, the use of user cooperation on all source coded packets significantly improves the reconstructed quality. As the source-destination channel improves the optimal policy becomes a hybrid that uses user cooperation only for the most important source packets. When the source destination channel is sufficiently good, all source packets are sent without cooperation. Thus, a test is presented to estimate the channels states when cooperation is first used.
Andres Kwasinski, K. J. Ray Liu
Added 22 Oct 2009
Updated 22 Oct 2009
Type Conference
Year 2006
Where ICIP
Authors Andres Kwasinski, K. J. Ray Liu
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