卫星通信双循环下Volterra滤波预失真算法  

Dual loop Volterra filter predistortion in satellite communication

作　　者：唐成凯[1] 廉保旺[1] 张玲玲[2] 

机构地区：[1]西北工业大学电子信息学院,陕西西安710072 [2]西北工业大学航海学院,陕西西安710072

出　　处：《西安电子科技大学学报》2015年第3期109-114,共6页Journal of Xidian University

基　　金：国家自然科学基金资助项目(61071216;61071125)

摘　　要：针对卫星功率放大器输出信号非线性化的问题,提出了一种简化预失真算法.该算法通过两个一阶截断Volterra滤波模型构建前馈循环和反馈循环,并结合两重循环调整预失真器系数来实现卫星通信发射信号线性化处理.在载波频率的提高或传输速度增大时,该算法仍可通过提高预失真器系数更新速度和精确度,从而保证卫星发射信号具有较好的线性特性,具有很好的使用价值和可操作性.Aimed at the non-linear output signal of the satellite carryon amplifier, a simplified predistortion algorithm is proposed. The algorithm is implemented by two one-order truncated Volterra filter models to construct the forward and feedback loop, and we adjust the predistortion coefficients with this dual loop to linear the output of the satellite transmitted signal. With this simplied predistortion algorithm, the predistortion coefficients updating speed and accuracy could be increased, and the linear characteristic for the signal transmitted by the satellite is well guaranteed.

关 键 词：卫星通信 预失真 Volterra滤波 双循环反馈 

分 类 号：TP722[自动化与计算机技术—检测技术与自动化装置]