Orientadores: Dalton Soares Arantes, Júlio César Rodrigues Fernandes de Oliveira / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação / Made available in DSpace on 2018-08-27T18:41:53Z (GMT). No. of bitstreams: 1 Salvador_ArleyHenrique_M.pdf: 3542397 bytes, checksum: 0847a4269c07c0969394ba0b40491987 (MD5) Previous issue date: 2015 / Resumo: Este trabalho apresenta a implementação de uma arquitetura paralela de um código corretor de erros para aplicações em redes ópticas que utilizam a técnica Foward Error Correction (FEC). O algoritmo FEC especificamente tratado neste trabalho é o Reed-Solomon, que é destinado principalmente a sistemas que sofrem influência causada por erros em rajadas somados ao sinal durante a transmissão, o que o torna adequado para transmissões ópticas. São expostas estruturas seriais de codificador e decodificador FEC e as etapas para convertê-las para uma estrutura paralela. Após descrever as etapas de conversão de uma estrutura serial para paralela é apresentada a estrutura do codificador/decodficador FEC Reed-Solomon RS(255,239) com estrutura paralela para operar em redes ópticas a uma taxa de 100 Gbit/s. Esta descrição exemplificativa é o objetivo principal deste trabalho. A implementação paralela do FEC oferece como vantagem a capacidade de processar os dados de forma rápida, permitindo o emprego desta solução em sistemas com altas taxas de dados. Foi elaborado um ambiente de testes com uma aplicação em redes de transporte óptico, ou Optical Transport Network (OTN). Esta funcionalidade consiste de um Transponder, que tem a função de mapear um cliente de 100 Gigabits Ethernet dentro de uma estrutura de quadro destinado a transmissão de dados em redes ópticas. Deste modo, pôde-se comprovar os resultados e o desempenho da estrutura proposta / Abstract: This paper presents the implementation of a parallel architecture error-correcting code for optical applications that uses the Forward Error Correction (FEC) technique. The FEC algorithm specifically addressed in this work is applied to the Reed-Solomon, which is mainly intended for systems that are harmed by burst errors, which makes it suitable for optical transmissions. A serial FEC encoder/decoder structure and the steps to convert it to a parallel approach are addressed in this work. An example of method that generates an encoder/decoder for a RS(255,239) Reed-Solomon code with parallel structure, able to operate at 100 Gbit/s data rate in optical networks, is also presented. The parallel implementation offers higher FEC processing speeds to handle higher throughputs. A test environment was designed with an application in optical transport networks (OTN). This feature consists a transponder which maps a 100 Gigabit Ethernet client inside an OTN frame structure. With this setup the expected results for the proposed FEC circuitry could be experimentally verified / Mestrado / Telecomunicações e Telemática / Mestre em Engenharia Elétrica

This thesis deals with Matlab application developed for simulation of the DVB-T channel coder and decoder. The first part of this thesis includes description of terrestrial digital video broadcasting system and comparison with analogue television. Channel coding and OFDM modulation, used in the DVB-T standard, is described in detail. Application developed in the Matlab environment is described in the second part. The application simulates data transfer of the DVB-T system. Results of the simulated transmission, using developed application are presented in the last part. Namely dependence of the BER on the S/N ratio, using various coder settings, was examined. Maximal possible data rate was determined for these various setting. All obtained values are graphically represented.

The work deals with the encoding and decoding of Reed-Solomon codes. There is generally described algebraic decoding of Reed-Solomon codes, and then described four methods of decoding, namely Massey-Berlekamp algorithm, Euclidean algoritus, Peterson-Gorenstein-Zierler algorithm and the direct method. These methods are then compared, and some of them are implemented in Matlab.

The thesis is focused on the sludge management at root sewage treatment plants with focus on volum eis highest – sludge manahement. Sludge dewatering using sludge dryiing bed is still condemned designers mainly due to their lack of experience, while at the same time enforcing technologically complex solutions. Therefore, the thesis focuses on the break down balance hydrological equation sludge drying bed, which includes all parameters affecting water balance system. The result is a proposal not only design, but in particular a description of input data and the governing equations in software Reed-Bed, which is calibrated own operational results obtainde for the two sewage treatment plants (village Dražovice and Kotenčice). Reed-Bed software will perform sevetal functions: setting the ground area of sludge bed, investment costs required for the implementation of sludge bed, return on investment, the determination of moisture contene of sludge in the sludge bed and maximum lenght of the dewatering period with regard to wetland vegetation. The second largest item within sludge system creates biomass wetland plants, so work deals with possibilities biomass processing plant at the end of the growing season. Technological processing of biomass was tested on common reed, final product pellets for heating.

<p>Predmet istraživanja doktorske disertacije je faktorizacija polinoma dve promenljive sa celobrojnim koeficijentima pomoću njima pridruženih Newton-ovih poligona. Formalizacija potrebnog i dovoljnog uslova za postojanje netrivijalne faktorizacije polinoma dve promenljive sa celobrojnim koeficijentima omogućava konstrukciju efektivnog algoritma za faktorizaciju. Konačno, dobijeni teorijski rezultati su primenjeni na dekodiranje jedne klase Reed &ndash; Solomon kodova, miksa dve kodne reči.</p> / <p>The research subject of the thesis is factorization of bivariate polynomials with integer coefficients via associated Newton polygons. Formalization of the necessary and sufficient condition for the existence of a non &ndash; trivial factorization of an arbitrary bivariate polynomial with integer coefficients obtains theoretical basis for construction of an effective factorization algorithm. Finally, these theoretical results are applied in decoding special class of Reed &ndash; Solomon codewords, mixture of two codewords.</p>

In this thesis the relationship between Gröbner bases and algebraic coding theory is investigated, and especially applications towards linear codes, with Reed-Müller codes as an illustrative example. We prove that each linear code can be described as a binomial ideal of a polynomial ring, and that a systematic encoding algorithm for such codes is given by the remainder of the information word computed with respect to the reduced Gröbner basis. Finally we show how to apply the representation of a code by its corresponding polynomial ring ideal to construct a class of codes containing the so called primitive Reed-Müller codes, with a few examples of this result.

No description available.

En 1965, Andy Warhol, déjà célèbre pour ses tableaux, décide de s’aventurer dans le domaine de la musique pop. Il devient alors gérant du Velvet Underground, un groupe rock newyorkais. Ce mémoire vise à rendre compte de l’influence de Warhol sur l’évolution musicale de cette formation entre 1965 et 1967. Dans un premier temps, une description du contexte socio-historique de l’époque et du milieu étudié est présentée, ainsi qu’un résumé des réalisations respectives de l’artiste et du groupe. Deux chansons du Velvet Underground sont ensuite analysées, soit « I’m Waiting for the Man » et « Ail Tomorrow’s Parties », toutes deux enregistrées à deux reprises soit avant et après la collaboration du groupe avec Warhol. Les éléments nouveaux ou transformés apparus dans les secondes versions sont alors répertoriés et comparés aux procédés utilisés par Warhol, ce qui permet d’évaluer l’influence de ce dernier sur l’évolution musicale du groupe. / Québec Université Laval, Bibliothèque 2019

International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California / This paper describes the new Telemetry Processor Hardware (TPH) that Avtec Systems has developed for the Deep Space Network (DSN) Telemetry Processor (TLP) system. Avtec is providing the Telemetry Processor Hardware to RTLogic! for integration into the Telemetry Processor system. The Deep Space Network (DSN) is an international network of antennas that supports interplanetary spacecraft missions for exploration of the solar system and the universe. The Jet Propulsion Laboratory manages the DSN for NASA. The TLP system provides the capability to acquire, process, decode and distribute deep space probe and Earth orbiter telemetry data. The new TLP systems will be deployed at each of the three deep-space communications facilities placed approximately 120 degrees apart around the world: at Goldstone, California; near Madrid, Spain; and near Canberra, Australia. The Telemetry Processor Hardware (TPH) supports both CCSDS and TDM telemetry data formats. The TPH performs the following processing steps: soft-symbol input selection and measurement; convolutional decoding; routing to external decoders; time tagging; frame synchronization; derandomization; and Reed-Solomon decoding. The TPH consists of a VME Viterbi Decoder/MCD III Interface board (VM-7001) and a PCI-mezzanine Frame Synchronizer/Reed-Solomon Decoder (PMC- 6130-J) board. The new Telemetry Processor Hardware is implemented using the latest Field Programmable Gate Array (FPGA) technology to provide the density and speed to meet the current requirements as well as the flexibility to accommodate processing enhancements in the future.

Beginning with an analysis of Northrop Frye’s concept of modal progression (i.e., the cycle from myth to irony—and back again) and an application of modal theory to an analysis of postmodern narrative forms, the need to revise Frye’s concept of modal progression becomes apparent. Rather than following the cyclical pattern Frye proposes, the course of modal progression appears to be fixed to an axis of experience: a certain normative threshold which describes the narrator’s and/or the narrative protagonist’s power of action relative to an assumed neutral audience. How the narrative depiction of the narrator and/or the fictional protagonist relates to this threshold determines the characteristics of the literary mode. As argued in this dissertation, the increase in the hero’s power of action (typical of late modern and postmodern literature) does not necessarily indicate an abrupt return to the mythic mode (as predicted by Frye). Instead, what is seen to emerge is a decidedly advanced species of narrative irony, or, “high irony” that, while maintaining its distinctly ironic qualities, displays a remarkable tendency to disassemble/reassemble precedent narrative forms (e.g., myth, nonfiction, realistic fiction) into a self-reflexive, highly metafictional form of parody. As the absurd, parodic chaos of the high ironic mode shares several significant traits with both myth and nonfiction, these overlapping, parodic relationships are of great literary importance and theoretical interest. These modal connections and disconnections are what this dissertation attempts to explore and clarify. To that end, this dissertation charts the various ways that myth and nonfictional forms have been put to parodic use in the high ironic metafictions of Donald Barthelme, Robert Coover and Ishmael Reed, three writers whose seminal mid-20th century works did much to shape and direct the course of contemporary American literature. Of special emphasis in this study is the American postmodern preoccupation with revision and the politics of literary subversion that attends this revisionary impulse. The final hypothesis reached by this dissertation is that the literary repercussions of these mid-20th century excursions into ironic, metafictional abstraction have not led to a return to myth, but rather to a discernable tendency among 21st century American writers to return to previously eschewed forms of nonironic narrative. This trajectory thus marks a movement away from forms of narrative irony (as well as away from the mode of myth) and an emerging tendency towards more referential, less fantastic forms of narrative fiction.