TR2005-158
| Improved Min-Sum Decoding of LDPC Codes Using 2-Dimensional Normalization | |||
| Citation: | Zhang, J.; Fossorier, M.; Gu, D.; Zhang, J., "Improved Min-Sum Decoding of LDPC Codes Using 2-Dimensional Normalization", IEEE Global Telecommunications Conference (GLOBECOM), Vol. 3, pp. 1187-1192, November 2005 (IEEE Xplore) | ||
| Date: | June 2006 | ||
| MERL Contact: | Jinyun Zhang | ||
A two-dimensional post normalization scheme is proposed to improve the performance of conventional min-sum (MS) and normalized MS decoding of irregular low density parity check codes. An iterative procedure based on parallel differential algorithm is presented to obtain the optimal two-dimensional normalization factors. Both density evolution analysis and specific code simulation show that the proposed method provides a comparable performance as belief propagation decoding while requiring less complexity. Interestingly, the new method exhibits a lower error floor than that of belief propagation decoding in the high SNR region. With respect to standard MS and one-dimentional normalizated MS decodings, the two-dimensional normailzed MS offers a considerably better performance. | |||
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