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q |
The square window smooth the true
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spectrum.
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q |
The degree of the smoothing is
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determined by the window length (L).
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q |
The shorter the window length, the
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stronger the smoothing will be.
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q |
In addition to the smoothing effect,
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data window also cause “spectral
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leakage”.
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q |
This leakage will introduce spurious
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oscillations at higher and lower
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frequencies and are out of phase with
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the true oscillation.
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