An LMS-Based Close-Loop Digital Predistorter for RF Power Amplifiers Using NARMA Structure

摘要：

This paper presents a design of close-loop digital predistorter (DPD) for Power Amplifier (PA), which can be fully performed in a Field Programmable Gate Array(FPGA) without the need of additional Digital Signal Processor(DSP) or Personal Computer(PC) to run the procedure of adaptation. The adaptation of lookup table of the Nonlinear Auto Regressive Moving Average (NARMA) model is realized by Least Mean Square (LMS) algorithm and the mapping relationship in the structure. Specific details of the LMS algorithm and the mapping relationship are provided. Finally, the results of an FPGA implementation demonstrate the performance (adjacent channel power ratio and error vector magnitude) of PA can be improved by our method.

关键词： Digital predistorter Power Amplifier FPGA NARMA LMS

作者: Ning Liu Xiaowei Kong Wei Xia Zishu He

作者单位: Department of Electronic Engineering University of Electronic Science and Technology of China Chengdu, China

会议类型: 国际会议

会议名称: 2010 2nd International Conference on Signal Processing System(2010年信号处理系统国际会议 ICSPS 2010)

会议地点: 大连

会议语种:英文

页码: 2286-2289

在线出版日期: 2010-07-05（万方平台首次上网日期，不代表论文的发表时间）