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Type: Artigo de periódico
Title: Constructive Spherical Codes on Layers of Flat Tori
Author: Torezzan, C
Costa, SIR
Vaishampayan, VA
Abstract: A new class of spherical codes is constructed by selecting a finite subset of flat tori from a foliation of the unit sphere S2L-1 subset of R-2L and designing a structured codebook on each torus layer. The resulting spherical code can be the image of a lattice restricted to a specific box in R-L in each layer. Group structure and homogeneity, useful for efficient storage and decoding, are inherited from the underlying lattice codebook. A systematic method for constructing such codes are presented as well some examples of constructions. Upper and lower bounds on the performance, the asymptotic packing density and a method for decoding are derived.
Subject: Flat torus
Gaussian channel
group codes
spherical codes
Country: EUA
Editor: Ieee-inst Electrical Electronics Engineers Inc
Rights: fechado
Identifier DOI: 10.1109/TIT.2013.2272931
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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