抽头动态更新频域LMS算法研究  

Research of DSFB frequency domain LMS algorithm

作　　者：罗侃[1] 王华[2] 张敏[3] 

机构地区：[1]成都工业学院,成都610031 [2]四川交通职业技术学院,成都611130 [3]四川大学,成都610041

出　　处：《计算机应用研究》2013年第12期3589-3592,共4页Application Research of Computers

基　　金：四川省教育厅自然科学基金资助项目(12ZB272)

摘　　要：提出一种抽头动态更新频域LMS算法(DSFB-FD-LMS)。DSFB-FD-LMS算法通过比较输出误差信号功率谱密度和噪声功率谱密度的大小,选择是否对此频柜进行权值更新,如果误差信号功率谱密度大于噪声信号功率谱密度,则对此频柜进行权值更新;如果误差信号功率谱密度小于噪声信号功率谱密度,说明对此频柜更新无意义,可停止对此频柜更新。此算法与传统的FD-LMS算法相比,选择适当的频柜进行更新,抑制了部分噪声,减小了均方偏差,降低了计算复杂度。This paper proposed an frequency domain LMS algorithm of dynamically innovation the parameters. The DSFB-FD-LMS algorithm compared the PSD of output err signal and the noise PSD. If the PSD of the err signal was bigger than the PSD of noise,it innovated the frequency bin, on the contrary, it stoped to innovate the frequency bin. The advantages of the proposed algorithm include two aspects：compared to the traditional FD-LMS,the proposed algorithm chose to innovate the frequency bin, so it suppressed the noise ,and diminished the deviation ,the second aspect is that the proposed algorithm reduced the complexity of computation.

关 键 词：FD-LMS 动态更新 频柜 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]