摘要
针对基于LMS算法的功率放大器自适应数字预失真技术收敛速度较慢的问题,文章提出了一种基于归一化LMS算法(NLMS)的数字预失真算法,用变步长方法来缩短其自适应收敛过程,能够有效地提高预失真收敛速度,加快表格更新速度。仿真结果表明NLMS算法相较于传统的LMS算法预失真效果更加理想。
A digital pre-distortion algorithm based on normalized LMS （NLMS） algorithm is presented. This algorithm addresses the problem of slow convergence. Variable step method is used to shorten the convergence process, increase the convergence speed and expedite the updating of look-up-table （LUT） ef- fectively. The simulation results show that the pre-distortion effect of NLMS algorithm is more ideal than that of the traditional LMS algorithm.
出处
《真空电子技术》
2015年第4期72-75,共4页
Vacuum Electronics
