In this study, the authors propose a new numerically stable digital predistorter for the linearisation of RF Power amplifiers. The proposed predistorter is based on the parameterised Gegenbauer polynomials that can be optimised for maximum predistorter efficiency and stability under different input signal distributions. The robustness and the efficiency of the proposed predistorter are experimentally demonstrated and compared to the ones of previously published polynomial model-based predistorters. The obtained results revealed exceptional numerical stability regardless of the input signal statistics, making the proposed predistorter suitable for the linearisation of multimode and broadband non-linear wireless transmitters.

中文翻译：

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用于RF功率放大器线性化的稳健数字预失真器

在这项研究中，作者提出了一种用于RF功率放大器线性化的新型数值稳定数字预失真器。所提出的预失真器基于参数化的Gegenbauer多项式，可以针对不同输入信号分布下的最大预失真器效率和稳定性进行优化。实验证明了所提出的预失真器的鲁棒性和效率，并将其与先前基于多项式模型的预失真器进行了比较。无论输入信号统计如何，所获得的结果均显示出出众的数值稳定性，从而使所提出的预失真器适合于多模和宽带非线性无线发射机的线性化。