Adaptive Predistortion Compensation for Nonlinearity of High Power Amplifiers

Adaptive Predistortion Compensation for Nonlinearity of High Power Amplifiers
复制标题

高功率放大器非线性的自适应预失真补偿

DOI：
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发表时间：
2003
期刊：
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影响因子：
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通讯作者：
A. Sano
A. Sano
中科院分区：
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文献类型：
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作者：
Yuanming Ding;H. Ohmori;A. Sano

文献摘要

被引文献

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本文提出了一种自适应预失真方案来补偿OFDM系统中高功率放大器（HPA）引起的非线性失真。采用复Wiener-Hammerstein模型（WHM）描述HPA系统的线性动态投入产出关系。预失真器直接由具有记忆的复幂级数模型艾德，该模型是由WHM表示的HPA的近似逆。通过对64 QAM-OFDM系统的数值仿真，验证了所提出的自适应补偿方案的有效性。
: In this paper, an adaptive predistortion scheme is proposed to compensate nonlinear distortions caused by high power amplifiers (HPA) in OFDM systems. A complex Wiener-Hammerstein model (WHM) is used to describe input-output relationship of HPA with linear dynamics. The predistorter is directly identified by complex power series model with memory, which is an approximate inverse of the HPA expressed by the WHM. The effectiveness of the proposed adaptive compensation scheme is validated by numerical simulation for 64QAM–OFDM systems.