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)
João Coelho Silva Filho
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
http://libdigi.unicamp.br/document/?code=000442931Documentos Relacionados
- Codigos treliça baseados em partições de reticulados : propriedades estruturais e determinação de codigos otimos
- Reticulados e codigos
- From binary codes to lattices and spherical codes
- SIMULATION TRELLIS CODES WITH MULTI-DIMENSIONAL MODULATION FOR THE TELEPHONE CHANNEL
- Goppa geometry codes via elementary methods