Trellis Coded Modulation
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Enumeração de espectro de distâncias de esquemas de modulação codificada em treliça empregando codificação turbo
In this work, a performance analysis of transmission schemes employing turbo trellis coded modulation. In general, the performance analysis of such schemes is guided by evaluating the error probability of these schemes. The exact evaluation of this probability is very complex and inefficient from the computational point of view, a widely used alternative is
Publicado em: 2010
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2. 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
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 propose
Publicado em: 2008
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3. Utilização conjunta de equalização adaptativa e codigos corretores de erro em processamento espacial e temporal
This work deals with the joint use of adaptive equalization and forward error correction codes. Firstly, we show some representative techniques of joint adaptive equalization and error correction codes. Secondly, we analyze through simulations and error surfaces the blind convergence of a linear transversal filter adapted by the least mean square (LMS) algor
Publicado em: 2001
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4. Codigos treliça baseados em partições de reticulados : propriedades estruturais e determinação de codigos otimos
Inserted in the mathematical theory of the error correcting codes and, in particular, for coded modulation schemes using trellis codes based on lattices partitions, this thesis introduces the new concepts of special subsets and the norm-matrix GN, with the objective of proposing an efficient algorithm for the exhaustive search, and determination, of new opti
Publicado em: 1999
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5. Uma contribuição aos codigos de treliça periodicamente variante no tempo
Thls research reports studies on Superlinear Periodically Time Varying Trellis Coded Modulation resulting from an interleavlng approach of Time Invarlant Trellis Coded Modulation. The performance of some of these schemes under the asymtoptlc coding gain as well as comparisons with the previous time invarlant ones are presented. The codlng and decodlng proces
Publicado em: 1988