用于功放线性化的自适应预失真可变索引方法研究及实现

Research and Implementation of a Variable Indexing Method of Adaptive Pre-distortion LUT （lookup table） Used for Power Amplifiers Linearization

该文提出了一种用于功放线性化的预失真查找表（LUT）的可变索引方法及其实现。在这种方法中，查找表项的密度与功率放大器非线性程度成比例，与传统LUT地址寻址方法相比，这种方法具有简单、灵活、自适应、易于实现等特点，并在FPGA中成功实现。实现结果表明，这种方法是切实可行的。

A variable indexing method and its implementation of pre-distortion lookup table （LUT） used for power amplifiers linearization is presented in this paper. The density of the table entries is proportional to the amplifier nonlinearity in this method. Compared with the conventional LUT addressing method the above method is simple, flexible, self-adaptive and easy to implement. This method has been successfully implemented in FPGA. The result proves the feasibility of the method.