Design of variable comb filter using FIR variable fractional delay element

详细信息	查看全文 | 推荐本文 |

• 作者：Soo-Chang Pei^a ; ^{pei@cc.ee.ntu.edu.tw} ; Yun-Da Huang^a ; ^{d97942016@ntu.edu.tw} ; Shih-Hsin Lin^a ; ^{r96942113@ntu.edu.tw} ; Jong-Jy Shyu^b ; ^{jshyu@nuk.edu.tw}
• 关键词：Comb filter ; Variable digital filter ; Variable fractional-delay filter ; Weighted least-squares approach ; Variable comb filter
• 刊名：Signal Processing
• 出版年：2012
• 期刊代码：162_01651684
• 类别：et
• 出版时间：October, 2012
• 卷：92
• 期：10
• 页码：2409-2421
• 文件大小：1664 K

摘要

In this paper, a new approach is proposed for the design of infinite-impulse-response (IIR) comb filter. The problem of the comb filter design is transformed into that of fractional delay filter design. Using the proposed method, the multiplier inside the proposed structure can be fixed regardless the value of fundamental frequency of harmonic interferences. This improvement makes the proposed structure be possible for the design of variable cases. To realize variable comb (VC) filter, the variable fractional-delay (VFD) filter is designed in weighted least-squares (WLS) sense first. Then, by embedding the designed VFD filter with a switch, the variable comb filter could be implemented in a proposed structure. Several experimental results and examples are presented to demonstrate the effectiveness of the proposed method.