Time-domain adaptive compensation for nonlinear distortion of high power amplifiers
Time-domain adaptive compensation for nonlinear distortion of high power amplifiers
复制标题
高功率放大器非线性失真的时域自适应补偿
DOI：
10.1109/acc.2003.1238969
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
A. Sano
中科院分区：
文献类型：
--
作者：
Yuanming Ding;H. Ohmori;A. Sano
提出了一种新的用于补偿高功率放大器非线性的时域自适应预失真方案。采用Hammerstein模型，用复多项式级数逼近HPA的输入输出非线性失真，然后用线性动态失真表示HPA的输入输出非线性失真。根据Hammerstein模型的结构，以实时的方式计算HPA的补偿输入，使得即使HPA的非线性输入-输出关系是不确定的和可变的，也可以实现从预失真器输入到HPA输出的线性化。数值仿真结果验证了所提出的自适应方案的有效性。
This paper is concerned with a new time-domain adaptive predistortion scheme for compensating nonlinearity of high power amplifiers (HPA). A Hammerstein model is adopted to approximate expression of the input-output nonlinear distortion of HPA by using complex polynomial series followed by linear dynamical distortion. According to the Hammerstein model structure, the compensation input to HPA is calculated in a real-time manner so that the linearization from the predistorter input to the HPA output can be attained even if the nonlinear input-output relation of HPA is uncertain and changeable. The effectiveness of the proposed adaptive scheme is validated in numerical simulations.