作　　者： ; ; ; ;

机构地区： 华南理工大学电子与信息学院

出　　处： 《信号处理》 2006年第4期486-491,共6页

摘　　要： 本文基于自适应逆控制原理提出了一种预失真器结构,即双多项式旁路辨识HPA的幅度和相位特征,然后再离线设计预失真器,最后将设计的已稳定的预失真器复制于发射通路。整个自适应过程高效,稳定,运算量小,能实时运行。补偿后的系统在饱和输入值范围内有近似的理想放大器特征。通过对OFDM信号仿真证明了以上特点。 In this paper, a structure of predistortion is presented based on the method of adaptive inverse control. A pair of polynomials are used to identify the amplitude and phase character of HPA bypass. Then the predistorter is designed off line. Finally the designed and steady predistorter is copied to the transmitted path. The whole process is proved high efficient, steady and low computational complexity. It can be implemented in real-time condition. The compensated system is characterized by the approximately ideal amplifier within the range of saturated input value. The above characters are proved through the simulation in OFDM system.

关 键 词： 自适应预失真 自适应逆控制

领　　域： [电子电信]