A Band-Limited Canonical Piecewise-Linear Function-Based Behavioral Model for Wideband Power Amplifiers
A Band-Limited Canonical Piecewise-Linear Function-Based Behavioral Model for Wideband Power Amplifiers
复制标题
宽带功率放大器的基于带限规范分段线性函数的行为模型
DOI：
10.1109/lmwc.2017.2750092
复制
发表时间：
2017
影响因子：
3
通讯作者：
Hong Wei
中科院分区：
文献类型：
--
作者：
Zhai Jianfeng;Li Yang;Yu Chao;Zhang Lei;Zhou Jianyi;Hong Wei
提出了一种基于带限正则分段线性函数(CPWL)的宽带功率放大器模型。该模型具有与带限动态偏差减小(DDR)Volterra级数模型相似的结构，但没有高阶项和长有限冲激响应滤波器，由CPWL代替。该模型比带限DDR Volterra级数模型具有更低的复杂度和更大的灵活性，模型参数可以用最小二乘法进行估计。实验结果表明，当宽带功率放大器受到带宽为100 MHz的5载波长期演进超前信号激励时，该模型的归一化均方误差和数字预失真性能与带限Volterra级数基本相同。
A band-limited canonical piecewise-linear function (CPWL)-based model is proposed for wideband power amplifiers (PAs). The model has a similar structure of the band-limited dynamic deviation reduction (DDR) Volterra series model but without high-order terms and long finite impulse response filters, which are replaced by CPWL. The model has lower complexity and more flexibility than the band-limited DDR Volterra series model and the model parameters can be estimated by the least-square method. Experimental results show that the proposed model nearly gives the same normalized mean square error and digital predistortion performance as the band-limited Volterra series when a wideband PA is excited by a 5-carrier long-term evolution advanced signal of 100-MHz bandwidth.