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Signal Recovery by Signal Averaging

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Automatisierte Medienanalyse

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Erkannte Entitäten
Sprachtranskript
Signal Recovery by Signal Averaging Modern measurement techniques cover many kinds of signals, for instance a voltage as the function of time. Often the record of the signal contains superimposed noise. Sometimes the signal is no longer discernible in the waveform. Retrieval of signals by
repetitive detection Signals can be retrieved from noise if they can be repeated relative to a known trigger signal. Electronic
equipment utilizing this procedure is known under the name of signal averager. One forms the
average of many repeated wave forms. This keeps the signal part constant, while the noise
part is reduced. More obvious for n = 100. After
a sufficient number of repetitions the signal can be retrieved with any prescribed accuracy. Here, it becomes visible as the line connecting the set of measured points. Plot in the
frequency domain The theory of the averaging effect is best
discussed in the frequency domain. Our signal consisted of three sine waves. As a function
of frequency the noise amplitude
is in general approximately a constant. Here, the signal amplitude is no more than 13. The averaging process reduces the noise amplitude. Eventually a signal to noise ratio of 13 has been reached. S/R as a function of N Plotting the signal to noise ratio as a function of the number N of repetitions results in a root function. Result: By N times repetition the signal to noise ratio increases proportional to the square root of N.
Tonbandgerät
Messung
Elektrisches Signal
Spannungsänderung
Computeranimation
Kaltumformen
Elektrisches Signal
Sensor
Rauschsignal
Elektronik
Schmitt-Trigger
Computeranimation
Elektrisches Signal
Ersatzteil
Rauschsignal
Computeranimation
Domäne <Kristallographie>
Elektrisches Signal
Tonfrequenz
Vorlesung/Konferenz
Direkte Messung
Satz <Drucktechnik>
Klangeffekt
Leitungstheorie
Computeranimation
Elektrisches Signal
Domäne <Kristallographie>
Mikrowelle
Tonfrequenz
Rauschsignal
Amplitude
Elektrisches Signal
Computeranimation
FIR
Elektrisches Signal
Prozessleittechnik
Querstromventilator
Rauschsignal
Amplitude
Rootsgebläse
Computeranimation

Metadaten

Formale Metadaten

Titel Signal Recovery by Signal Averaging
Alternativer Titel Signalextraktion durch Mittelwertbildung
Autor Schlier, Christoph
Benz, Alois
Lizenz Keine Open-Access-Lizenz:
Es gilt deutsches Urheberrecht. Der Film darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
DOI 10.3203/IWF/C-1285eng
IWF-Signatur C 1285
Herausgeber IWF (Göttingen)
Erscheinungsjahr 1978
Sprache Englisch
Produzent IWF
Produktionsjahr 1977

Technische Metadaten

IWF-Filmdaten Film, 16 mm, LT, 35 m ; SW, 3 1/2 min

Inhaltliche Metadaten

Fachgebiet Physik
Abstract Signal recognition, noise amplitude, signal to noise ration, signal averager, noise supression.
Schlagwörter signal averaging
noise supression
signal recovery
signal-to-noise ratio
signal recognition

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