Power amplifiers (PAs) used in modern radio frequency transmitters for communications display significant nonlinear dynamic effects under typical operating regimes. Accurate and efficient implementations of behavioral models describing these effects are required in order to enable system‐level simulation, or for guiding the design of effective linearization predistorters. This work proposes an efficient implementation of the widely adopted modified‐Volterra model, resulting from a global rational functions approximation of the model nonlinear convolution kernels. The proposed implementation, tested by gallium nitride PA simulations, reproduces the model behavior with high‐accuracy and features an extremely compact structure, comparing favorably with alternative descriptions.

中文翻译：

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通过全局有理函数逼近有效实现改进的Volterra射频功率放大器非线性动力学模型

现代射频发射机中用于通信的功率放大器（PA）在典型的工作条件下显示出明显的非线性动态影响。为了实现系统级仿真或指导有效线性化预失真器的设计，需要准确有效地描述这些影响的行为模型。这项工作提出了一种广泛采用的修改后的Volterra模型的有效实现方法，该模型是模型非线性卷积核的全局有理函数逼近产生的。通过氮化镓PA模拟测试所提出的实现方案，以高精度再现了模型行为，并且具有极其紧凑的结构，与替代说明相比具有优势。