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Esquemas PTS codificados com fonte Implet.Fountain para redução da PAPR em sistemas OFDM

Esquemas PTS codificados com fonte Implet.Fountain para redução da PAPR em sistemas OFDM

Prof. Surajkumar Ghatage

50,61 €
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Editorial:
KS OmniScriptum Publishing
Año de edición:
2025
Materia
Empresa y gestión
ISBN:
9786208646783
50,61 €
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Sobre IBD

A Multiplexagem Ortogonal por Divisão de Frequência (OFDM) surgiu como uma técnica de modulação promissora para a transmissão de dados a alta velocidade nos modernos sistemas de comunicação sem fios. No entanto, a presença de um rácio elevado entre a potência máxima e a potência média (PAPR) continua a ser um desafio significativo nos sistemas OFDM, conduzindo a uma amplificação ineficiente da potência e a uma potencial degradação do sinal. Para resolver este problema, este artigo apresenta uma nova abordagem para reduzir a PAPR em sistemas OFDM usando esquemas de Sequência de Transmissão Parcial (PTS) codificados por Fountain. Os códigos Fountain, bem conhecidos pela sua eficiente resistência ao apagamento e descodificação de baixa complexidade, são incorporados na estrutura PTS para melhorar as capacidades de redução da PAPR. A implementação proposta explora o paralelismo inerente à codificação Fountain para gerar um conjunto diversificado de sequências candidatas de forma eficiente, o que ajuda a atenuar a degradação do desempenho relacionada com a PAPR sem introduzir uma sobrecarga computacional significativa. O relatório efectua uma avaliação exaustiva do desempenho dos esquemas PTS com codificação Fountain através de simulações exaustivas em vários cenários OFDM, incluindo taxas de dados variáveis, condições de canal e tamanhos de constelação.

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