Pseudocodeword weights for non-binary LDPC codes

Details Pseudocodeword weights for non-binary LDPC codes Pseudocodeword weights for non-binary LDPC codes

2006-05-24

arxiv.org/abs/cs/0605118v1

Computer Science

Information Theory

5 pages, 3 figures. To appear in Proceedings of the 2006 IEEE International Symposium on Information Theory, July 9-14, 2006,

Scientific paper

Pseudocodewords of q-ary LDPC codes are examined and the weight of a pseudocodeword on the q-ary symmetric channel is defined. The weight definition of a pseudocodeword on the AWGN channel is also extended to two-dimensional q-ary modulation such as q-PAM and q-PSK. The tree-based lower bounds on the minimum pseudocodeword weight are shown to also hold for q-ary LDPC codes on these channels.

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