Um m?todo emp?rico para estima??o do n?mero de fontes de sinais incidentes em um arranjo de sensores

• Ano de defesa: 2014
• Autor(a) principal: Soares, Patr?cia Maria
• Orientador(a): Guimar?es, Dayan Adionel
• Banca de defesa: Guimar?es, Dayan Adionel , Souza, Rausley Adriano Amaral de , Ferreira, Lu?s Henrique de Carvalho , Ynoguti, Carlos Alberto
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Instituto Nacional de Telecomunica??es
• Programa de Pós-Graduação: Mestrado em Engenharia de Telecomunica??es
• Departamento: Instituto Nacional de Telecomunica??es
• País: Brasil
• Palavras-chave em Português: Estima??o do n?mero de fontes; teoria de matrizes aleat?rias; crit?rio de informa??o de Akaike (AIC); crit?rio de informa??o Bayesiana (BIC); m?todo do comprimento de m?nima descri??o (MDL)
• Área do conhecimento CNPq: Engenharia - Telecomunica??es
• Link de acesso: http://tede.inatel.br:8080/tede/handle/tede/28

This dissertation proposes an empirical method for estimating the number of sources of signals impinging on multiple sensors. The method is based on the analysis of the norms of vectors whose elements are the normalized eigenvalues of the received signal covariance matrix and the corresponding normalized indexes. It is shown that such norms can be used to classify the eigenvalues in two groups: the largest and the remaining ones, thus allowing for the estimation of the number of sources without the knowledge of any additional parameter. The norm-based method, as it is called here, produces consistent estimates as the number of samples increases, and in some situations has a higher probability of correct estimation when compared to a new and effective method based on the random matrix theory. Is also addressed in this study methods based on information theory which is the Akaike information criterion (AIC), the method of minimum description length (MDL) and the Bayesian information criterion (BIC). Some fundamental concepts are also provided, in order to facilitate the understanding of the above methods.