TR2006-055
| Two-Dimensional Correction for Min-Sum Decoding of Irregular LDPC Codes | |||
| Citation: | Zhang, J.; Fossorier, M.; Gu, D.; Zhang, J., "Two-Dimensional Correction for Min-Sum Decoding of Irregular LDPC Codes", IEEE Communication Letters, ISSN: 1089-7798, Vol. 10, Issue 3, pp. 180-182, March 2006 (IEEE Xplore) | ||
| Date: | June 2006 | ||
| MERL Contact: | Jinyun Zhang | ||
Two-Dimensional (2-D) correction schemes are proposed to improve the performance of conventional min-sum (MS) decoding of irregular low density parity check codes. An iterative procedure based on parallel differential optimization is presented to obtain the optimal 2-D factors. Both density evolution analysis and simulation show that the proposed method provides a comparable performance as belief propagation (BP) decoding while requiring less complexity. Interestingly, the new method exhibits a lower error floor than that of BP decoding. With respect to conventional MS and 1-D normalized MS decodings, the 2-D normalized MS offers a better performance. The 2-D offset MS decoding exhibits a similar behavior. | |||
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