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Keywords
(9)
Adaptive Filter
Additive Noise
Antenna Array
Automatic Detection
Electrocardiogra...
Gaussian Noise
Signal To Noise Ratio
Adaptive Noise Canceller
Linear Time Invariant
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Spatiotemporal QRST cancellation techniques for analysis of atrial fibrillation
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Adaptive noise cancelling: Principles and applications
Adaptive noise cancelling: Principles and applications,10.1109/PROC.1975.10036,Proceedings of The IEEE,B. Widrow,J. M. McCool,J. Kaunitz,C. S. William
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Adaptive noise cancelling: Principles and applications
(
Citations: 1244
)
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B. Widrow
,
J. M. McCool
,
J. Kaunitz
,
C. S. Williams
,
R. H. Hearn
,
J. R. Zeidler
,
Jr. Eugene Dong
,
R. C. Goodlin
This paper describes the concept of adaptive noise cancelling, an alternative method of estimating signals corrupted by
additive noise
or interference. The method uses a "primary" input containing the corrupted signal and a "reference" input containing noise correlated in some unknown way with the primary noise. The reference input is adaptively filtered and subtracted from the primary input to obtain the signal estimate. Adaptive filtering before subtraction allows the treatment of inputs that are deterministic or stochastic, stationary or time variable. Wiener solutions are developed to describe asymptotic adaptive performance and output signaltonoise ratio for stationary stochastic inputs, including single and multiple reference inputs. These solutions show that when the reference input is free of signal and certain other conditions are met noise in the primary input can be essentiany eliminated without signal distortion. It is further shown that in treating periodic interference the
adaptive noise canceller
acts as a notch filter with narrow bandwidth, infinite null, and the capability of tracking the exact frequency of the interference; in this case the canceller behaves as a linear, timeinvariant system, with the
adaptive filter
converging on a dynamic rather than a static solution. Experimental results are presented that illustrate the usefulness of the adaptive noise cancelling technique in a variety of practical applications. These applications include the cancelling of various forms of periodic interference in electrocardiography, the cancelling of periodic interference in speech signals, and the cancelling of broadband interference in the sidelobes of an antenna array. In further experiments it is shown that a sine wave and
Gaussian noise
can be separated by using a reference input that is a delayed version of the primary input. Suggested applications include the elimination of tape hum or turntable rumble during the playback of recorded broadband signals and the
automatic detection
of verylowlevel periodic signals masked by broadband noise.
Journal:
Proceedings of The IEEE  PIEEE
, vol. 63, no. 12, pp. 16921716, 1975
DOI:
10.1109/PROC.1975.10036
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Citation Context
(483)
...Although several researchers have studied the use of the adaptive filtering technique for removing heart sound noise from BS recorded, or for electrocardiogram (ECG) analysis and arrhythmia detection [
13
]...
ChinFu Tsai
,
et al.
Labview based bowelsounds monitoring system in realtime
...ANC is a technique for estimating or recovering a desired signal in the presence of additive noise [
8
]...
...Then, energy of e[k] may be considered as a cost function for adjusting filter W as [
8
]:...
...That, L is the filter length and η represents a learning factor [
8
]...
Behnaz Papari
,
et al.
A wideband timeinterleaved A/D converter for cognitive radio applica...
...The system output can be used as feedback to adjust the filter and minimize the error [1], [
2
]...
...Adaptive noise cancellation techniques have been successfully applied in many applications ranging from electrocardiography, audio signal processing, and receivers collocated with highpower transmitters [
2
], [3]...
Ann Trippe
,
et al.
An adaptive broadband BiCMOS active spur canceller
...Adaptive noise cancellers (ANCs), originally proposed by Widrow et al. [
1
], have been successfully applied to speech enhancement in lowSNR (signaltonoise) conditions [2]...
Akihiko Sugiyama
,
et al.
An adaptive noise canceller with adaptive delay compensation for a dis...
...The adaptive notch filter with a sinusoidal reference signal has advantages of bandwidth control and tracking the frequency of narrowband interference [
8
]...
HyeonJin Jeon
,
et al.
A Narrowband Active Noise Control System With Frequency Corrector
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Peter E. Clark
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, vol. 185, no. 1, pp. 9096, 2011
Unsupervised kernel least mean square algorithm for solving ordinary differential equations
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Infantile Hypertrophic Pyloric Stenosis: Epidemiology, Genetics, and Clinical Update
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Labview based bowelsounds monitoring system in realtime
ChinFu Tsai
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TsungJu Wu
,
YenMiao Chao
Published in 2011.