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- W2113161886 abstract "In this paper a new nonlinear digital baseband predistorter design is introduced based on direct learning, together with a new Wiener system modeling approach for the high power amplifiers (HPA) based on the B-spline neural network. The contribution is twofold. Firstly, by assuming that the nonlinearity in the HPA is mainly dependent on the input signal amplitude the complex valued nonlinear static function is represented by two real valued B-spline neural networks, one for the amplitude distortion and another for the phase shift. The Gauss-Newton algorithm is applied for the parameter estimation, in which the De Boor recursion is employed to calculate both the B-spline curve and the first order derivatives. Secondly, we derive the predistorter algorithm calculating the inverse of the complex valued nonlinear static function according to B-spline neural network based Wiener models. The inverse of the amplitude and phase shift distortion are then computed and compensated using the identified phase shift model. Numerical examples have been employed to demonstrate the efficacy of the proposed approaches." @default.
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- W2113161886 date "2011-07-01" @default.
- W2113161886 modified "2023-09-26" @default.
- W2113161886 title "B-spline neural network based digital baseband predistorter solution using the inverse of De Boor algorithm" @default.
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- W2113161886 doi "https://doi.org/10.1109/ijcnn.2011.6033196" @default.
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