MODELING OF POWER AMPLIFIER NONLINEARITIES USING VOLTERRA SERIES
MODELING OF POWER AMPLIFIER NONLINEARITIES USING VOLTERRA SERIES
复制标题
使用 VOLTERRA 系列对功率放大器非线性进行建模
DOI：
10.3182/20050703-6-cz-1902.00132
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
R. Harrison
中科院分区：
文献类型：
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作者：
Yufeng Wan;T. Dodd;R. Harrison
摘要射频功率放大器（RF power amplifier, pa）是无线电通信设备中最重要的器件之一，用于放大输入信号的功率。同时，由于线性度与效率之间的矛盾，它们逐渐成为现代通信系统的瓶颈，导致其较高的能耗。Volterra核由于其卷积结构，自然是典型功率器件中主要的互调和谐波畸变的良好表征。已经做了一些工作，通过使用Volterra系列来模拟扭曲。然而，由于计算的复杂性，Volterra级数展开式通常被严重截断，因此它们不能给出原始系统的准确表示。它的最终目的是在射频功率放大器的建模中应用时不变的离散时间Volterra级数方法来评估失真水平，以消除或减少它们。由于我们的计算设备有限，本初步工作中的实验PA仅在100Hz至1kHz的中等频率范围内激发。IFAC
Abstract Radio Frequency (RF) power amplifiers (PAs) are one of the most important elements in radio telecommunication facilities, which are used to amplify the power of input signals. At the same time, they gradually become the bottleneck for modern telecommunication systems due to the confliction between the linearity and the efficiency, resulting in their relatively high level energy consumption. Volterra kernels are naturally good representations of intermodulation and harmonic distortions, the main distortions in typical power devices, because of their convolutional structures. Some work has been done to model the distortions by using Volterra series. However, Volterra series expansions are usually truncated severely, due to complexity of computation, so that they do not give accurate representations of the original system. It is intended ultimately to apply a time-invariant, discrete-time Volterra series method in the modelling of RF power amplifiers to assess distortion levels to eliminate or reduce them. Owing to our limited computational facilities, the experimental PA in this preliminary work is only excited in a moderate frequency range, 100Hz to 1kHz. IFAC