Bias Error of Cascade Connected Second Order IIR Adaptive Notch Filter Using Adaptive Line Enhancer

2019 ◽  
Vol 139 (9) ◽  
pp. 1102-1103
Author(s):  
Masaki Kobayashi
Keyword(s):  
Notch Filter ◽  
Second Order ◽  
Bias Error ◽  
Adaptive Notch Filter ◽  
Adaptive Line Enhancer

Arctangent Gradient Based Adaptive Algorithm for a Second-Order Adaptive IIR Notch Filter

2015 ◽  
Vol 781 ◽  
pp. 535-538
Author(s):  
Rachu Punchalard
Keyword(s):  
Adaptive Algorithm ◽  
Unbiased Estimator ◽  
Frequency Estimation ◽  
Notch Filter ◽  
Second Order ◽  
Filter Parameter ◽  
Adaptive Notch Filter ◽  
Slow Adaptation ◽  
Gradient Based

Frequency estimation based on adaptive notch filter is very attractive due to simplicity and economy. This paper presents an arctangent gradient (AG) based adaptive algorithm for a second-order constrained adaptive IIR notch filter (ANF). The motivation is to use an arctangent value of the gradient signal to adjust the filter parameter. It is revealed that for slow adaptation, the AG can be considered as an unbiased estimator. The quantitative simulations have been conducted to support the superior of the proposed AG algorithm.

Effective bass enhancement using second-order adaptive notch filter

2008 ◽  
Vol 54 (2) ◽  
pp. 663-668 ◽  
Author(s):  
Junho Lee ◽  
Eunjung Song ◽  
Youngcheol Park ◽  
Daehee Youn
Keyword(s):  
Notch Filter ◽  
Second Order ◽  
Adaptive Notch Filter
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