PURPOSE: A digital pre-distorter based on a canonical piece-wise-linear model for the linearization of a power amplifier and an apparatus including the same are provided to prevent the diffusion of spectrum and the distortion of a signal due to the non-linearity of a high power amplifier. CONSTITUTION: A wireless telecommunications installation device(200) comprises an HPA(High Power Amplifier)(210) and a digital pre-distorter(220). The digital pre-distorter comprises a pre-distortion unit(225), a PWL(Piecewise-Linear) modeling unit(230), an operator(235), and a reverse calculator(240). The PWL modeling unit models the HPA. The operator calculates an error signal by subtracting an output signal of the PWL modeling unit in an output signal of the HPA. The PWL modeling unit updates fixed parameters for property modeling of the HPA. The reverse calculator calculates the reverse of a property which is modeled from the PWL modeling unit.
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