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Communication Dans Un Congrès Année : 2009

Conflict Resolution by Matrix Reordering for DVB-T2 LDPC Decoders

Résumé

Layered decoding is known to provide efficient and high-throughput implementation of LDPC decoders. However, the implementation of the layered architecture is not always straightforward because of the memory access conflicts in the a-posteriori information memory. In this paper, we focus our attention on a particular type of conflict introduced by the existence of multiple diagonal matrices in the DVB-T2 parity check matrix structure. We illustrate how the reordering of the matrix reduces the number of conflicts, at the cost of limiting the level of parallelism. We then propose a parity extending process to solve the remaining conflicts. Fixed point simulation results show coherent performance without modifying the layered architecture.

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Electronique
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Dates et versions

hal-00479636 , version 1 (01-05-2010)

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  • HAL Id : hal-00479636 , version 1

Citer

Cédric Marchand, Jean-Baptiste Doré, Laura Conde-Canencia, Emmanuel Boutillon. Conflict Resolution by Matrix Reordering for DVB-T2 LDPC Decoders. IEEE GLOBECOM'2009, Nov 2009, United States. pp.1-6. ⟨hal-00479636⟩
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