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スペクトル漏れ（英: Spectral leakage）とは、信号をスペクトル分析したとき、本来の信号には含まれていないはずの周波数成分でわずかなエネルギーが観測される現象。本来の信号スペクトルから周囲の周波数に漏れ出すようにエネルギーが観測されることから、このように言う。
, 스펙트럼 누설(Spectral leakage)이라는 것은 신호를 했을 때, 원래의 신호에는 포함되어 있지 않은 주파수 성분이 관측되는 현상을 말한다. 원래의 신호 스펙트럼 주위의 주파수에 누설이 된 것과 같은 에너지가 관측되어 이와 같이 부른다.
, Der Leck-Effekt, Fenster-Effekt oder Leaka … Der Leck-Effekt, Fenster-Effekt oder Leakage-Effekt ist ein Phänomen der Signalanalyse. Der Begriff beschreibt die Tatsache, dass sich, bedingt durch den nur endlich langen Beobachtungszeitraum eines Signals, im Rahmen von Spektralanalysen wie der Fourieranalyse in dem berechneten Frequenzspektrum auch Frequenzanteile finden, die bei einem nur theoretisch möglichen unendlich langen Beobachtungszeitraum nicht vorkämen.angen Beobachtungszeitraum nicht vorkämen.
, The Fourier transform of a function of tim … The Fourier transform of a function of time, s(t), is a complex-valued function of frequency, S(f), often referred to as a frequency spectrum. Any linear time-invariant operation on s(t) produces a new spectrum of the form H(f)•S(f), which changes the relative magnitudes and/or angles (phase) of the non-zero values of S(f). Any other type of operation creates new frequency components that may be referred to as spectral leakage in the broadest sense. Sampling, for instance, produces leakage, which we call aliases of the original spectral component. For Fourier transform purposes, sampling is modeled as a product between s(t) and a Dirac comb function. The spectrum of a product is the convolution between S(f) and another function, which inevitably creates the new frequency components. But the term 'leakage' usually refers to the effect of windowing, which is the product of s(t) with a different kind of function, the window function. Window functions happen to have finite duration, but that is not necessary to create leakage. Multiplication by a time-variant function is sufficient. by a time-variant function is sufficient.
, Cuando se calcula la transformada discreta … Cuando se calcula la transformada discreta de Fourier (DFT) de una señal (por ejemplo, para obtener la densidad espectral de potencia), el manchado espectral o leakage ocurrirá si alguna de las componentes frecuenciales cae entre frecuencias de referencia. Esto resulta en la difuminación de estas frecuencias. El leakage también tiene lugar cuando se calcula la DFT de una señal que contiene el resto de un ciclo. Por ejemplo, si una onda senoidal de 3 Hz se muestrea durante 0.9 segundos, se produce una discontinuidad, la cual causa un manchado espectral. Visto desde otro punto de vista, y relacionado con el análisis frecuencial, el leakage es un efecto que se produce en señales de longitud finita o segmentos finitos extraídos de señales infinitas donde parece como si parte de la energía se hubiese "filtrado" desde el espectro original de la señal hacia otras frecuencias. Típicamente el leakage muestra una serie de lóbulos.
* Datos: Q1431214a una serie de lóbulos.
* Datos: Q1431214
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스펙트럼 누설(Spectral leakage)이라는 것은 신호를 했을 때, 원래의 신호에는 포함되어 있지 않은 주파수 성분이 관측되는 현상을 말한다. 원래의 신호 스펙트럼 주위의 주파수에 누설이 된 것과 같은 에너지가 관측되어 이와 같이 부른다.
, Der Leck-Effekt, Fenster-Effekt oder Leaka … Der Leck-Effekt, Fenster-Effekt oder Leakage-Effekt ist ein Phänomen der Signalanalyse. Der Begriff beschreibt die Tatsache, dass sich, bedingt durch den nur endlich langen Beobachtungszeitraum eines Signals, im Rahmen von Spektralanalysen wie der Fourieranalyse in dem berechneten Frequenzspektrum auch Frequenzanteile finden, die bei einem nur theoretisch möglichen unendlich langen Beobachtungszeitraum nicht vorkämen.angen Beobachtungszeitraum nicht vorkämen.
, スペクトル漏れ（英: Spectral leakage）とは、信号をスペクトル分析したとき、本来の信号には含まれていないはずの周波数成分でわずかなエネルギーが観測される現象。本来の信号スペクトルから周囲の周波数に漏れ出すようにエネルギーが観測されることから、このように言う。
, Cuando se calcula la transformada discreta … Cuando se calcula la transformada discreta de Fourier (DFT) de una señal (por ejemplo, para obtener la densidad espectral de potencia), el manchado espectral o leakage ocurrirá si alguna de las componentes frecuenciales cae entre frecuencias de referencia. Esto resulta en la difuminación de estas frecuencias. El leakage también tiene lugar cuando se calcula la DFT de una señal que contiene el resto de un ciclo. Por ejemplo, si una onda senoidal de 3 Hz se muestrea durante 0.9 segundos, se produce una discontinuidad, la cual causa un manchado espectral.
* Datos: Q1431214 un manchado espectral.
* Datos: Q1431214
, The Fourier transform of a function of tim … The Fourier transform of a function of time, s(t), is a complex-valued function of frequency, S(f), often referred to as a frequency spectrum. Any linear time-invariant operation on s(t) produces a new spectrum of the form H(f)•S(f), which changes the relative magnitudes and/or angles (phase) of the non-zero values of S(f). Any other type of operation creates new frequency components that may be referred to as spectral leakage in the broadest sense. Sampling, for instance, produces leakage, which we call aliases of the original spectral component. For Fourier transform purposes, sampling is modeled as a product between s(t) and a Dirac comb function. The spectrum of a product is the convolution between S(f) and another function, which inevitably creates the new frequency components. But theates the new frequency components. But th
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| rdfs:label |
스펙트럼 누설
, Leck-Effekt
, Manchado espectral
, Spectral leakage
, スペクトル漏れ
|
