Contributions to the search methods of optimum trellis codes on new lattices partitioning / Contribuições aos metodos de procura dos codigos de treliça otimos sobre novas partições de reticulados

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

This thesis presents some contributions to the coded modulation schemes for the trellis codes based on lattices partitioning. One of the main contributions is the construction of the trellis codes based on novel lattices partitioning and also on chains partitioning. In order to optimize the search for the optimum trellis codes, a search algorithm was proposed. An equivalence class is proposed to exclude the generator matrix of equivalent codes. This equivalence class, when applied to the search algorithm for optimum trellis codes, reduces quite strongly the number of generator matrices to be investigated. Several examples of trellis codes on lattices quotient are shown in bi-dimensional, three-dimensional and tetra-dimensional spaces with satisfactory coding gain and lower average energy of the signal constellations

ASSUNTO(S)

sistemas decimais de codigo binario theory encoded trellis code teoria dos reticulados teoria da codificação teoria dos erros lattices partitioning codigos de controle de erros (teoria da informação) error-correcting code and lattices

ACESSO AO ARTIGO

Documentos Relacionados