Programa de Pós-graduação em Engenharia Elétrica e da Computação

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Navegando Programa de Pós-graduação em Engenharia Elétrica e da Computação por Assunto "1. Antenas ajustáveis Processamento de sinais 2. Ondas eletro- magnéticas 3. Processamento de sinais Técnicas digitais 4. Com- plexidade computacional"

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    Redução da complexidade computacional do método de estimação de ângulos de incidência através da diferença entre os valores singulares da matriz de covariância espacial
    (Universidade Federal de Goiás, 2009-03-13) SILVA, Hugo Vinícius Leão e; LEMOS, Rodrigo Pinto; http://lattes.cnpq.br/3333000136853156
    This work is concerned with the estimation of Direction-Of-Arrival (DOA) angles of plane waves impinging on a sensor array. Among all methods of estimation found in litera-ture, MODEX (MODE with eXtra roots) outstands for its performance and computational complexity. However, recently, a method called SEAD (SEArch of Direction by differential spectrum) was proposed. It has shown better estimation performance against noise than MODEX has. However, its computational complexity is prohibitive for real-time applications. In order to reduce it s computational complexity, a new estimate selection procedure on SEAD is proposed, that yields to significantly less candidate angles than before. Additionally, the introduction of iterative refinements on estimates has allowed improving resolution as well as complexity reduction