1 Unequal Error Protection: An Information Theoretic Perspective
Shashi Borade, Barış Nakiboğlu, Lizhong Zheng · DSpace@MIT (Massachusetts Institute of Technology) · 2009
A general information theoretic framework for unequal error protection is developed in terms of exponential error bounds. The qualitative 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 qualitative 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.