A transform domain LMS adaptive filter with variable step-size

被引：35
|
作者：
Bilcu, RC [1 ]
Kuosmanen, P [1 ]
Egiazarian, K [1 ]
机构：
[1] Tampere Univ Technol, Signal Proc Lab, FIN-33101 Tampere, Finland
来源：
IEEE SIGNAL PROCESSING LETTERS | 2002年 / 9卷 / 02期
关键词：
adaptive algorithms; discrete cosine transform (DCT); transform domain LMS; variable step-size;
D O I：
10.1109/97.991136
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this letter, we introduce a new transform domain (least mean square) LMS algorithm with variable step. The existing approaches use different time-variable step-sizes for each filter tap. The step-sizes are time-variable due to the power estimates of each transform coefficient. In our new approach, for each step-size we define a local component that is given by the power normalization, and a global component that is the same for each filter coefficient. We will show here that if the global component is also made time-variable, depending on the output error, the speed of convergence can be significantly improved.
引用
收藏
页码：51 / 53
页数：3
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