Unequal Error Protection: An Information Theoretic Perspective

Details Unequal Error Protection: An Information Theoretic Perspective Unequal Error Protection: An Information Theoretic Perspective

2008-03-18

arxiv.org/abs/0803.2570v4

Computer Science

Information Theory

45 pages, 6 figures, Submitted to IEEE Transaction on Information Theory. Corrected typos

Scientific paper

An information theoretic framework for unequal error protection is developed in terms of the exponential error bounds. The fundamental difference between the bit-wise and message-wise unequal error protection (UEP) is demonstrated, for fixed length block codes on DMCs without feedback. Effect of feedback is investigated via variable length block codes. It is shown that, feedback results in a significant improvement in both bit-wise and message-wise UEP (except the single message case for missed detection). The distinction between false-alarm and missed-detection formalizations for message-wise UEP is also considered. All results presented are at rates close to capacity.

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