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Spherical Codes on Torus Layers

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Autor(es):
Torezzan, Cristiano ; Costa, Sueli I. R. ; Vaishampayan, Vinay A. ; IEEE
Número total de Autores: 4
Tipo de documento: Artigo Científico
Fonte: 2009 IEEE INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY, VOLS 1- 4; v. N/A, p. 2-pg., 2009-01-01.
Resumo

A new class of spherical codes is constructed by selecting a finite subset of flat tori that foliate the unit sphere S2L-1 subset of R-2L and constructing a structured codebook on each torus in the finite subset. The codebook on each torus is the image of a lattice restricted to a specific hyperbox in R-L. Group structure and homogeneity, useful for efficient decoding, are inherited from the underlying lattice codebook. Upper and lower bounds on performance are derived and a systematic search algorithm is presented for constructing optimal codebooks. The torus layer spherical codes presented here exhibit good performance when compared to the well known apple-peeling, wrapped and laminated codes. (AU)

Processo FAPESP: 02/07473-7 - Códigos geometricamente uniformes em espaços homogêneos
Beneficiário:Sueli Irene Rodrigues Costa
Modalidade de apoio: Auxílio à Pesquisa - Temático
Processo FAPESP: 05/58102-7 - Códigos corretores de erros gerados por grupos de simetrias
Beneficiário:Cristiano Torezzan
Modalidade de apoio: Bolsas no Brasil - Doutorado Direto