一种改进的LMS/F组合算法及其在同址干扰抵消中的应用  

A modified combined LMS/F algorithm and its application in adaptive cosite interference cancellation

作　　者：袁小刚[1] 黄国策[1] 许彬[2] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077 [2]中兴通讯股份有限公司,陕西西安710065

出　　处：《电子技术应用》2009年第2期121-124,共4页Application of Electronic Technique

基　　金：国防科技重点实验室基金(51473020105JB3203);陕西省自然科学基金(2006F22)

摘　　要：在研究最小均方算法LMS(Least Mean Squre)、最小四阶算法LMF(Least Mean Fourth)和LMS/F组合算法的基础上,引入修正因子γ对LMS/F组合算法进行改进。改进的LMS/F组合算法在保持LMS/F组合算法优良的收敛精度和稳定性的基础上,进一步提高了收敛速度和对时变系统的跟踪特性。改进的算法参数调整简单、高效且运算量小,仿真结果与理论分析相一致,证实了该算法的优异性能。Based on the discussing the adapting filtering algorithms of LMS algorithm, LMF algorithm and the combined LMS/F algorithm, this paper introduced a positive number γ as the modifying factor to modify the combined LMS/F algorithm. The modified combined LMS/F algorithm improved the convergence speed and the tracking characteristic of the time-variable system, while it kept the characteristic of a small steady state error and its stability. The adjusting of the modifying factorγ was simple and effective, and the modified algorithm had low computational complexity. Computer simulation results confirmed the theoretical analysis and show the excellent performance of the modified combined LMS/F algorithm.

关 键 词：自适应滤波 LMS/F组合算法 修正因子γ 干扰抵消 

分 类 号：TN911.7[电子电信—通信与信息系统] O221.2[电子电信—信息与通信工程]