Design of IIR multiple notch filters based on all-pass filters

Joshi, Yashwant; Roy, S.

doi:10.1109/82.752914

Cited by 36 publications

(20 citation statements)

References 5 publications

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“…In practice, zero bandwidths can not be realized [22]. Hence, the frequency response of an actual notch filter is the approximation to that of the ideal one.…”

Section: Improved Multiple Notch Filter Designmentioning

confidence: 99%

“…They have been widely applied in a variety of disciplines ranging from audio signal processing to biomedical engineering [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Recently, there has been interest in designing multiple-frequency notch filters that aim to suppress two or more frequencies of an input signal [20][21][22][23][24][25]. Two types, finite-impulse response (FIR) and infinite-impulse response (IIR), exist.…”

Section: Introductionmentioning

confidence: 99%

“…Several approaches exist to design IIR multiple notch filters [1][2][3][21][22][23][35][36][37][38][39][40]. The cascading method is a popular direct design technique that realizes a multiple notch filter by cascading several well-designed secondorder IIR single-notch filters [36].…”

Section: Introductionmentioning

confidence: 99%

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A generalized design framework for IIR digital multiple notch filters

Wang

Kundur

2015

EURASIP J. Adv. Signal Process.

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Digital multiple notch filters are used in a variety of applications to remove or suppress multiple sinusoidal or narrow-band interference in digital signals. In this paper, we propose an all-pass filter-based design framework for infinite impulse response (IIR) multiple notch filters. Our approach aims to overcome the limitations of former techniques through greater design capacity and performance. The proposed framework has versatility and enables the tailored use of design constraints thus providing a family of possible multiple notch filter design methods. The design performance and practicality of the proposed framework are verified empirically by a series of experimental results and different applications.

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“…In practice, zero bandwidths can not be realized [22]. Hence, the frequency response of an actual notch filter is the approximation to that of the ideal one.…”

Section: Improved Multiple Notch Filter Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A generalized design framework for IIR digital multiple notch filters

Wang

Kundur

2015

EURASIP J. Adv. Signal Process.

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“…In general, multiple notch filters are designed to have not-too-narrow bandwidths for stability reasons. There are two techniques for solving the overlapping problem, which are the optimal pole position technique 5 , and the all-pass filter of order 2N technique 8 . The optimal pole position technique 5 is simple and practical, since it does not require any complicated calculation.…”

Section: Introductionmentioning

confidence: 99%

“…They can also be designed in several ways, such as transforming analogue notch filter [1][2][3] , the pole-reposition technique [4][5][6] , and implementation based on all-pass filters [7][8][9] which is considered in this paper.…”

Section: Introductionmentioning

confidence: 99%

A novel design of IIR multiple notch filter based on an all-pass filter by using a pole-reposition technique

Thamrongmas¹,

Charoenlarpnopparut

Prempree³

2014

ScienceAsia

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In this paper, a novel and simple method based on an all-pass filter is presented by using the benefits of a pole re-position technique. The gains at frequencies of π of each single notch filter are adjusted by adding N − 1 tuning variables. The proposed method ensures that the passband gains are uniformly flat, the notch frequencies exactly meet the specifications, and the realized 3 dB bandwidths are approximately the same as those specified. This technique is very useful for designers because there are only N − 1 tuning variables required to adjust, and it does not need a complicated mathematical calculation. Although this technique is simple and easy to implement, it requires many iterations to find a suitable parameter for making the passband gain between two notch frequencies uniformly flat. Hence in this paper, three searching algorithms have been applied to reduce the number of iterations. We obtain a faster search and a closer frequency response to the ideal one.

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