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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

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Showing 1 to 3 of 3 (0.032 seconds)

Spelling suggestions: "subject:"group core""

1

THE SEARCHING METHOD OF QUASI-OPTIMUM GROUP SYNC CODES ON THE SUBSET OF PN SEQUENCES

Jie, Cao, Qiu-cheng, Xie 11 1900 (has links)
International Telemetering Conference Proceedings / October 29-November 02, 1990 / Riviera Hotel and Convention Center, Las Vegas, Nevada / As the code length is increasing, the search of optimum group sync codes will be more and more difficult, even impossible. This paper gives the searching method of quasi-optimum group sync codes on the small subset of PN sequences -- CVT-TAIL SEARCHING METHOD and PREFIX-SUFFIX SEARCHING METHOD. We have searched out quasi-optimum group sync codes for their lengths N=32-63 by this method and compared them with corresponding optimum group sync codes for their lengths N=32-54. They are very approximative. The total searching time is only several seconds. This method may solves the problems among error sync probability, code length and searching time. So, it is a good and practicable searching method for long code.
OPTIMUM GROUP SYNC CODES
CODE
SYNCHRONIZATION
QUASI-OPTIMUM GROUP CODE
2

Convolutional Codes with Additional Structure and Block Codes over Galois Rings

Szabo, Steve January 2009 (has links)
No description available.
Mathematics
convolutional code
cyclic code
semisimple
Galois ring
skew cyclic
group code
3

Ideais em anéis de matrizes finitos e aplicações à Teoria de Códigos / Ideals in finite matrix rings and applications to Coding Theory

Taufer, Edite 19 January 2018 (has links)
Neste trabalho damos uma descrição completa dos ideais à esquerda em anéis de matrizes sobre corpos finitos. Aplicamos estes resultados ao estudo de álgebras de grupo de uma família particular de grupos indecomponíveis e mostramos como construir códigos corretores de erros como ideais destas álgebras. Em particular, exibimos exemplos de códigos tais que, para um dado comprimento e uma dada dimensão, têm o melhor peso possível. / In this work we give a complete description of the left ideals in the full ring of matrices over a finite field. We apply these results to the study of group algebras of a given family of indecomposable groups and show how to construct error correcting codes as ideals of these algebras. In particular, we exhibit examples of codes such that, for a given length and a given dimension, have the best possible weight.
Álgebra de grupo
Anel de matrizes
Best code
Código de grupo
Códigos corretores de erros
Corpo finito
Error correcting codes
Finite field
Group algebra
Group code
Matrix ring
Melhor código

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