FEC encoding: BCH-LDCP
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Autor/a
Novellón Gironès, Enrique
Otros/as autores/as
Universitat Ramon Llull. La Salle
Fecha de publicación
2010Resumen
At this fully digital age and with the massive transmission of information by
electronic media, the error detection and correction is something inherent to the
electronic transmission of information. This transmission is performed by several
channels: copper cable, optical fiber, electromagnetic waves.... There exist interferences, noise, that affect to these channels and can introduce errors during the
transmission. For this reason it is necessary to know how to detect when these
errors occur and to be able to correct them whenever it is required.
In the theory of information, the Shannon-Hartley theorem is an application
of the theorem of codification for noisy channels. The theorem determines the
Shannon-capacity of the channel, a superior bound that establishes the maximum
quantity of digital data that can be transmitted without error (i.e. information)
by that channel with a specific bandwidth and which is affected by the presence of
noise.
The last few years have witnessed a significant decrease in the gap between
the Shannon channel capacity limit and what is practically achievable. Progress
has resulted from novel extensions of previously known coding techniques involving
interleaved concatenated codes. A considerable body of simulation results is now
available, supported by an important but limited theoretical basis.
This thesis presents a deep analysis about the types of coding used in the ultimate
versions of the DVB standards, such as terrestrial (T2), satellite (S2) and cable (C2).
This codes are Bose and Chaudhuri Hocquenghem (BCH) and Low-Density ParityCheck (LDPC) and they successfully approach the Shannon limit. It is presented,
first of all, an introduction to the world of error-correcting codes so as to get a global
idea. There is also a final comparison between LDPC and Turbo-Codes, another
important type of coding although not used in the standards mentioned before. At
the end, it is presented a brief summary of the main ideas and a list of conclusions
Tipo de documento
Trabajo fin de máster
Lengua
English
Materias (CDU)
004 - Informática
62 - Ingeniería. Tecnología
Palabras clave
Codis correctors d'errors (Teoria de la informació) -- TFM
Páginas
126 p.
Colección
MUEXT; 1799
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