自适应算法在干扰抵消器应用中的比较研究  

Comparison of Adaptive Filtering Algorithms Used in Interference Cancellation System

作　　者：任晓亚[1] 宋爱民[1] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077

出　　处：《通信技术》2007年第12期48-50,共3页Communications Technology

摘　　要：文中介绍了自适应滤波算法的原理和干扰抵消器工作原理,并将LMS算法、NLMS算法和变步长LMS算法分别应用在了干扰抵消器中进行了仿真。仿真的结果表明,三种自适应算法运用到了干扰抵消器中,都可以很好地滤除干扰,提取有用信号。其中运用了变步长LMS算法的干扰抵消器无论在收敛速度和滤波性能上,都要强于其他两种算法。In this paper, the theory of Adaptive Filtering Algorithms and the interference cancellation system is introduced, and the comparisons on applications of LMS algorithms, NLMS algorithms and variable step-size LMS algorithms in the interference cancellation system are described. The simulation results show that all of these adaptive algorithms can cancel interference and obtain the desired singnal. The interference cancellation system using the variable step-size LMS algorithms is faster in convergence speed and much better in the performance of fitering.

关 键 词：自适应干扰抵消 干扰抵消器 自适应滤波算法 仿真 

分 类 号：TN911.71[电子电信—通信与信息系统]