Identificação de Modulação Digital Cega em Sistemas de Antenas Múltiplas
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Identificação de Modulação Digital Cega em Sistemas de Antenas Múltiplas

Identificação de Modulação Digital Cega em Sistemas de Antenas Múltiplas


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About the Book

Este livro resume a investigação que sugere um novo método que melhora significativamente os algoritmos estatísticos de ordem superior para identificação cega de modulação digital (DMI) (HOS). A fim de efetuar uma compensação nos momentos de ordem superior (HOM) e obter uma estimativa de HOM livre de ruído, o método sugerido faz uso da estimativa da potência do ruído. O método sugerido irá superar os algoritmos DMI anteriores que se baseiam apenas em cumulantes ou que não têm em conta a redução do ruído HOM quando testados para sistemas de múltiplas antenas, mesmo para um recetor com deficiências. A melhoria será efectuada mantendo o mesmo nível de complexidade do DMI baseado em HOS na mesma situação. A identificação da modulação é o passo que sucede à deteção de energia e precede a desmodulação do sinal. Quando tanto os sinais de origem como os parâmetros do canal são desconhecidos, estamos num contexto cego que requer naturalmente um processo cego de reconhecimento da modulação. Apesar da sua elevada precisão de identificação, as técnicas baseadas na máxima verosimilhança para a identificação da modulação sofrem frequentemente de uma complexidade substancialmente elevada. Os algoritmos de identificação de modulação baseados em características são uma alternativa que proporciona um bom desempenho.


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Product Details
  • ISBN-13: 9786206122111
  • Publisher: KS Omniscriptum Publishing
  • Binding: Paperback
  • Language: Portuguese
  • Returnable: N
  • Weight: 154 gr
  • ISBN-10: 6206122115
  • Publisher Date: 23 Jun 2023
  • Height: 229 mm
  • No of Pages: 64
  • Spine Width: 4 mm
  • Width: 152 mm


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