In this paper a successive approximation approach for MIMO linear parameter varying (LPV) systems with affine parameter dependence is proposed. This new approach is based on an algorithm previously introduced by the authors, which elaborates on a convergent sequence of linear deterministicstochastic state-space approximations. In the previous algorithm the bilinear term between the time varying parameter vector and the state vector is allowed to behave as a white noise process when the scheduling parameter is a white noise sequence. However, this is a strong limitation in practice since, most often than not, the scheduling parameter is imposed by the process itself and it is typically a non white noise signal. In this paper, the bilinear term is analysed for non white noise scheduling sequences. It is concluded that its behaviour depends on the input sequence itself and it ranges from acting as an independent colored noise source, mostly removed by the identification algorithm, down to a highly input correlated signal that may be incorrectly assumed as being part of the system subspace. Based on the premise that the algorithm performance can be improved by the noise energy reduction, the bilinear term is expressed as a function of past inputs, scheduling parameters, outputs, and states, and the linear terms are included in a new extended input.
Resumo-Neste artigo estudamos alocação de recursos de rádio para redes cooperativas com presença de múltiplos repetidores e múltiplos usuários. A alocação de recursos em nosso cenário consiste na seleção de repetidores, pareamento e assinalamento de subportadoras e alocação de potência de transmissão. Em especial, motivados pela demanda por maior eficiência no uso dos recursos energéticos em redes móveis, realizamos a otimização da eficiência energética em um cenário cooperativo sujeito a restrições de qualidade de serviço. Apesar do problema formulado ser inteiro e não linear, aplicamos um método iterativo que retorna a soluçãoótima. Através de simulações computacionais, apresentamos a eficiência do método apresentado, bem como o impacto de otimizar eficiência energética em redes cooperativas.Palavras-Chave-alocação de recursos, redes cooperativas, eficiência energética, qualidade de serviço.
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