Suppression of multiple narrow-band interference using real-time adaptive notch filters

Soderstrand, M.A.; Johnson, T.G.; Strandberg, R.H.; Loomis, H.H.; Rangarao, Kaluri V.

doi:10.1109/82.558456

Cited by 46 publications

(17 citation statements)

References 7 publications

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“…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%

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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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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%

A generalized design framework for IIR digital multiple notch filters

Wang

Kundur

2015

EURASIP J. Adv. Signal Process.

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“…However, if this frequency varies over time, the notch filter becomes ineffective. The problem of reducing interference on the lines carrying information signals has been dealt with in the past [10], [11], but given the inadequacy of the traditional techniques, it continues to be an active area of research [2][3][4][5][6][7][8][9]. In its generality, the problem can be formulated as the problem of elimination of interferences of nonstationary nature, and finds applications in other areas of communications as well [12], [13].…”

Section: Introductionmentioning

confidence: 99%

“…A frequently occurring problem with the telephone lines is the existence of the interference resulting from induced voltages by ubiquitous power lines and devices [1], which degrades the quality of the voice/data signal [2][3][4][5][6]. Traditional notch filters are inadequate in solving this problem as the frequency of the power grid can potentially vary over time [7], [8].…”

Section: Introductionmentioning

confidence: 99%

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Power Line Interference Elimination on Telephone Loops

McNamara

Majo

Ziarani

2005 IEEE Instrumentationand Measurement Technology Conference Proceedings

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A new method of elimination ofpower line interference of potentially time-varying frequency on telephone loops is presented. The proposed method is based on adaptive estimation, and subsequent elimination, of the fundamental and individual harmonic components of the induced power signal and tracking their variations over time. The structure of the proposed technique is presented and its performance is demonstrated in a scenario where the frequency of the power line interference undergoes variations over time. Superior performance of the proposed method over existing techniques is observed. The proposed algorithm presents a simple and efficient method of elimination of narrowband interferences of potentially nonstationary nature.

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An energy‐efficient anti‐jam cognitive system for wireless OFDM communication

Imran

Loan

Mahmood

2013

Int J Communication

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SUMMARY In this paper, anti‐jamming capabilities are proposed for a generic OFDM‐based wireless communication system. The performance of a wireless system may severely degrade in presence of jamming or intentional interferences. A malicious entity can send strong interference or noisy signals in the same transmit frequency band thus preventing the intended receiver to correctly decode the transmitted data. As a countermeasure, our work proposes algorithms and techniques to restore the system performance in presence of such malicious entities. Proposed anti‐jamming system consists of an adaptive framework that adapts itself to varying jammer behavior and wireless environment, and then, it chooses an optimal strategy to effectively cancel out the effect of jamming and channel fading. Optimization problem is formulated as a multi‐objective criterion for maximization of system throughput and minimization of energy consumption. Simulation results computed in Rayleigh fading channels with different wideband jamming modes and powers show that the proposed system effectively cancels out the jamming and channel fading effects thus maximizing the system performance and minimizing cost of energy consumption. Copyright © 2013 John Wiley & Sons, Ltd.

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Suppression of multiple narrow-band interference using real-time adaptive notch filters

Cited by 46 publications

References 7 publications

A generalized design framework for IIR digital multiple notch filters

A generalized design framework for IIR digital multiple notch filters

Power Line Interference Elimination on Telephone Loops

An energy‐efficient anti‐jam cognitive system for wireless OFDM communication

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