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In the context of digital pre-distortion, a typical requirement is to identify the power amplifier with stringently low computational complexity. Accordingly, we consider a simple gradient method which is used to adaptively fit a simplified Wiener model, i.e., a cascade of a linear filter followed by a memoryless nonlinearity, to a dispersive and saturating reference system which represents the power...
A new robust linear controller design method is considered. The robust controller consists of two parts: (1) A conventional model matching feedback which assures that the reference signal to output signal transfer function is identical to that of a given reference model. (2) A conceptually new linear "modeling error compensator which exploits a modeling error signal (based on the plant input...
The certainty equivalence principle is used to combine a robust adaptive law with a control structure derived from the linear quadratic (LQ) control problem. The resulting adaptive control scheme is applicable to minimum and non-minimum phase continuous-time plants and is robust with respect to unmodeled dynamics and bounded disturbances. The computational complexity of the continuous-time adaptive...
In this paper we consider the Model Reference Control and Model Reference Adaptive Control problem of a class of linear time-varying plants with bounded, piecewise smooth parameters. We first introduce a new controller structure that solves the Model Reference Control problem, with zero tracking error, in the case of smooth slowly time-varying plant parameters. When the plant parameters are unknown...
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