以下为句子列表：
英文: A digital base band adaptive predistortion method to compensate nonlinear distortions introduced by a high-power amplifier (HPA) in orthogonal frequency division multiplexing (OFDM) system is proposed.
中文: 摘要提出了一种用于正交频分复用(OFDM)系统中补偿由大功率放大器引起的非线性失真的基带自适应预失真方法。
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英文: In the linearity of amplifier, the predistortion and the feedforward are the most popular techniques which possess different characteristics.
中文: 在功率放大器的线性化方法中，预失真和前债是最常用的手段。
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英文: The adaptive predistorter given can achieve the predistortion compensation based on piecewise estimating HPA nonlinear characteristic curve and training HPA estimator nonlinear parameters via performing inverse transform with curve fitting section by sect
中文: 自适应预失真器是基于对大功率放大器的非线性特性进行分段估计，由曲线拟合逐段取逆变换来训练大功率放大器的预失真器的非线性参数，以达到预失真补偿的目的。
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