Title :
Extremal problems of information combining
Author :
Jiang, Yibo ; Ashikhmin, Alexei ; Koetter, Ralf ; Singer, Andrew C.
Author_Institution :
Coordinated Sci. Lab., Univ. of Illinois at Urbana-Champaign, Urbana, IL
Abstract :
In this paper we study moments of soft-bits of binary-input symmetric-output channels and solve some extremal problems of the moments. We use these results to solve the extremal information combining problem. Further, we extend the information combining problem by adding a constraint on the second moment of soft-bits, and find the extreme distributions for this new problem
Keywords :
binary codes; channel coding; method of moments; binary-input symmetric-output channels; extremal information combining problem; extreme distributions; second moment; soft-bit moment; Belief propagation; Binary phase shift keying; Concatenated codes; Decoding; Mutual information; Parity check codes; Phase modulation; Probability distribution; Statistical distributions; Upper bound;
Conference_Titel :
Information Theory, 2005. ISIT 2005. Proceedings. International Symposium on
Conference_Location :
Adelaide, SA
Print_ISBN :
0-7803-9151-9
DOI :
10.1109/ISIT.2005.1523539
