Spectral Estimation Techniques: Correlogram, Blackman–Tukey, Windowed Periodogram, Bartlett, and Welch Methods

1. In the Blackman-Tukey method, how does truncating the autocorrelation function and applying a window affect the spectral estimate?
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2. Which scenario would most likely degrade the reliability of the periodogram in estimating a signal’s PSD?
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3. In the Bartlett method, why is the variance reduced compared to a basic periodogram, and what is the resulting trade-off?
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4. In Welch’s method, how does the use of overlapping segments influence the spectral estimate?
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5. When applying a window in a windowed periodogram, what is the **key effect** on the frequency domain representation?
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6. The correlogram method assumes a key property about the signal to compute the PSD. What is that assumption?
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7. Which of the following best distinguishes the Blackman-Tukey method from the correlogram?
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8. What is a key limitation of the windowed periodogram despite its leakage-reduction capability?
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9. In Welch's method, which configuration would most effectively balance resolution and variance reduction?
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10. Which method is most appropriate when the goal is to estimate PSD from autocorrelation with minimal spectral leakage and controlled resolution?
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